当前位置:首页 > 六年级 > 数学试卷

【321245】六年级数学上册典型例题系列之第三单元分数除法应用题基础部分(解析版)

时间:2025-01-08 19:38:43 作者: 字数:11666字
简介:

www.ishijuan.cn 爱试卷为中小学老师学生提供免费的试卷下载

六年级数学上册典型例题系列之Shape1

第三单元分数除法应用题基础部分(解析版)Shape2

Shape3 Shape4

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape5

【考点一】把一个数平均分成几份,平均每份是多少?每份占这个数的几分之几?Shape6

【方法点拨】 Shape7

该类题型注意区分单位“1”和分量,求平均每份是多少,即总数÷份数=每份数量;求每份占几分之几,即把总数看作单位“1”,用1÷份数=几分之几Shape8

【典型例题1Shape9

把一根 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 米长的绳子平均分成4段,每段长多少米?每段占全长的几分之几?Shape10

解析:第一个问题是求每段数量的多少,用总数量÷总份数即可得到;第二个问题是求每段占全长的几分之几,即求每份是总份数的几分之几Shape11

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape12

1÷4= <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape13

答:略。Shape14

【对应练习1Shape15

一段4米长的钢筋平均锯成5段,每一段长多少米?每一段占全长的几分之几?Shape16

解析:4÷5= <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> (米)Shape17

1÷5= <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape18

【对应练习2Shape19

把一根长 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 米长的绳子平均分成4段,每段长多少米?每段占全长的几分之几?Shape20

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape21

1÷4= <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape22

答:略。Shape23

【对应练习3Shape24

把一根 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 米长的绳子平均分成4段,每段长多少米?每段占全长的几分之几?Shape25

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape26

1÷4= <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape27

答:略。Shape28

【对应练习4Shape29

食堂有2吨大米,如果每天吃它的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> ,可以吃多少天?如果每天吃 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 吨,可以吃多少天?Shape30

解析:1÷ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =10(天)Shape31

2÷ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =20(天)Shape32

答:略。Shape33

【考点二】分数除法中的归一问题Shape34

【方法点拨】Shape35

该类题型注意根据题目的要求分清总量和份数各是什么,用总量÷份数=单位量Shape36

【典型例题】Shape37

一辆汽车行9千米耗油 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 千克.照这样计算,每行驶1千米,需要汽油多少千克?1千克汽油可行驶多少千米?Shape38

解析:第一个问题是需要汽油多少千克?把汽油看作总量,把行驶路程看作份数,用汽油总量÷路程总量即可;第二个问题是1升汽油可行驶多少千米?把路程看作总量,把汽油重量看作份数,用路程数÷汽油数即可。Shape39

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape40

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape41

答:略。Shape42

【对应练习1Shape43

一辆自行车 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape44 小时行驶 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 千米,这辆自行车每小时行驶多少千米?每千米需要多少小时?

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape45

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape46

答:略。Shape47

【对应练习2Shape48

一种汽车行 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape49 千米用汽油 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 升,这种汽车行1千米用汽油   升,这种汽车用1升汽油可行   千米

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape50

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape51

【对应练习3Shape52

一种柴油 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape53 升重 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 千克.1升这样的柴油重  千克?1千克这样的柴油  升?

解析:① <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape54

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape55

Shape56

Shape57

Shape58

Shape59

Shape60

【考点三】求一个数是(占)另一个数的几分之几?Shape61

【方法点拨】Shape62

一个数÷另一个数(单位“1”=分率Shape63

【典型例题1Shape64

三年级一班一共有42名同学,其中参加游泳比赛的有18名,参加游泳比赛的占全班人数的几分之几?Shape65

解析:本题求参加游泳比赛的占全班人数的几分之几?“占”“是”相当于“÷,直接用游泳比赛人数÷全班人数即可。Shape66

18÷42= <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape67

答:略。Shape68

【对应练习1Shape69

学校的果园里有梨树15棵,苹果树20棵。梨树的棵数是苹果树的几分之几?Shape70

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape71

答:略。Shape72

【对应练习2Shape73

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape74 千克是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 千克的几分之几?

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape75

Shape76

【对应练习3Shape77

3米是5米的几分之几?Shape78

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape79

Shape80

Shape81

Shape82

Shape83

Shape84

【考点四】已知两个数,求一个数比另一个数多或少几分之几?Shape85

【方法点拨】口诀:“作差除比后”Shape86

【典型例题1Shape87

学校的果园里有梨树15棵,苹果树20棵。苹果树的棵数比梨树多几分之几?Shape88

解析:利用作差除比后的口诀即可直接列式。Shape89

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape90

Shape91

【对应练习1Shape92

图书馆有科技书560本,连环画有640,连环画的数量比科技书多几分之几? Shape93

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape94

Shape95

【对应练习2Shape96

王师傅计划生产810个零件,实际生产了900,实际比计划多生产几分之几?Shape97

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape98

Shape99

【对应练习3Shape100

去年产粮50万吨,今年产粮60万吨,求:Shape101

(1)去年产粮是今年的几分之几?Shape102

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape103

Shape104

2)今年是去年的多少倍?Shape105

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape106

Shape107

3)今年比去年多几分之几?Shape108

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape109

Shape110

  1. 去年比今年少几分之几?Shape111

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape112

Shape113

【典型例题2Shape114

学校的果园里有梨树15棵,苹果树20棵。梨树的棵数比苹果树少几分之几?Shape115

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape116

Shape117

【对应练习1Shape118

电子厂男职工有320人,女职工有200人,女职工比男职工少几分之几? Shape119

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape120

Shape121

【对应练习2Shape122

六年级同学向灾区捐款600元,五年级同学向灾区捐款360,五年级同学比六年级少捐几分之几?Shape123

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape124

Shape125

【对应练习3Shape126

六一班男生18人,女生27人。Shape127

1)男生是女生的几分之几?Shape128

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape129

Shape130

2)女生是男生的几倍?Shape131

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape132

Shape133

3)男生比女生少几分之几?Shape134

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape135

Shape136

4)女生比男生多几分之几?Shape137

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape138

【考点五】已知一个数的几分之几是多少,求这个数?Shape139

【方法点拨】Shape140

单位“1”未知,用除法,即分量÷分率=单位“1”Shape141

该类题型主要有两种方法解决:Shape142

1.列方程法:Shape143

找准单位“1”的量,设为x;Shape144

找出题目中的等量关系;Shape145

列出方程求解;Shape146

检验作答。Shape147

2.算术法:即量率对应法Shape148

找出单位“1”Shape149

找出已知量和已知量占单位“1”的几分之几(分率);Shape150

列出除法算式,即 已知量÷已知量占单位“1”的几分之几=单位“1”的量。Shape151

【典型例题】Shape152

埃及最大的金字塔由于受风雨侵蚀,现在的高度大约有140m,相当于刚建成时高度的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 。这座金字塔刚建成时的高度大约是多少米?Shape153

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape154

答:略。Shape155

Shape156

【对应练习1Shape157

一个儿童体内所含水分有28千克,占体重的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 。这个儿童的体重有多少千克?Shape158

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape159

答:略。Shape160

Shape161

Shape162

Shape163

【对应练习2Shape164

一条裤子的价格是75元,是一件上衣的。一件上衣多少元?Shape165

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape166

答:略。Shape167

Shape168

【对应练习3Shape169

甲是乙的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> ,甲是15,求乙是多少?Shape170

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape171

Shape172

【对应练习4Shape173

一个数的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 9,求这个数是多少?Shape174

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape175

Shape176

【对应练习5Shape177

多少吨的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 3吨。Shape178

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape179

Shape180

Shape181

【对应练习6Shape182

一堆沙,运走了它的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> ,正好是24吨,这堆沙有多少吨?Shape183

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape184

Shape185

Shape186

Shape187

Shape188

【考点六】已知一个数的连续几分之几是多少,求这个数?Shape189

【方法点拨】Shape190

单位“1”未知,用除法,即分量÷分率=单位“1”Shape191

注意:该类题型不同点在于题目种会有两个及以上单位“1”,且都未知,要求我们找准不同分量对应的分率,进而求得最终结果。Shape192

【典型例题】Shape193

铺草坪,王师傅铺了 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape194 m2,王师傅铺的是李师傅的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> ,李师傅铺的是徐师傅的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a>

徐师傅铺了多少平方米草坪?Shape195

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape196

答:略。Shape197

Shape198

Shape199

【对应练习1Shape200

光明小学航模小组是生物小组的,生物小组的人数是美术小组的。航模小Shape201

组有8人,美术小组有多少人?Shape202

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape203

答:略。Shape204

Shape205

Shape206

【对应练习2Shape207

学校体育室有篮球21个,蓝球个数是排球的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape208 ,排球是足球的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> ,足球有多少个?

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape209

答:略。Shape210

Shape211

Shape212

【对应练习3Shape213

在一周内甲做数学题36道,等于乙做的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape214 ,乙做的题数等于丙做的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> ,丙做了多少道题?

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape215

答:略。Shape216

Shape217

【考点七】已知比一个数多几分之几的数是多少,求这个数?Shape218

【方法点拨】Shape219

分量÷1+分率)=单位“1”Shape220

【典型例题】Shape221

学校有20个足球,足球比篮球多,篮球有多少个?Shape222

解析: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape223

Shape224

【对应练习1看图列式计算Shape225

Shape226  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a>

Shape227

Shape228

Shape229

解析:120÷1+ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =100(千克)Shape230

Shape231

【对应练习2Shape232

水结成冰后体积增加 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> ,一块体积是143dm3的冰化成水后,体积是多少立方分米?Shape233

解析:143÷1+ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =130(立方分米)Shape234

答:略。Shape235

Shape236

【对应练习3Shape237

学校今年实际用电1500度,实际比计划多用 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> ,今年计划用电多少度?Shape238

解析:1500÷1+ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =1200(度)Shape239

答:略。Shape240

Shape241

【考点八】已知比一个数少几分之几的数是多少,求这个数?Shape242

【方法点拨】Shape243

分量÷1-分率)=单位“1”Shape244

【典型例题】Shape245

王师傅的月工资为2000元,比李师傅少,李师傅每月工资收入是多少元?Shape246

解析:2000÷1- <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =2500(元)Shape247

答:略。Shape248

Shape249

【对应练习1看图列式计算Shape250

Shape251  <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a>

Shape252

Shape253

Shape254

解析:100÷1- <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =140(本)Shape255

答:略。Shape256

Shape257

【对应练习2Shape258

今年产鲜鱼20万吨,比去年减产 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> ,去年产了多少万吨鱼?Shape259

解析:20÷1- <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =25(万吨)Shape260

答:略。Shape261

Shape262

【对应练习3Shape263

某工人九月份加工完成360个零件,比八月份多加工 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> ,八月份加工多少个零件?Shape264

解析:360÷1+ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape265 = <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> (个)

答:略。Shape266

Shape267

【对应练习4Shape268

修一条路,已修4天,平均每天修35米,已修的比剩下的少 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> ,这条路全长多少米?Shape269

解析:4×35=140(米)Shape270

140÷1- <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =200(米)Shape271

140+200=340(米)Shape272

答:略。Shape273

Shape274

【考点九】分数乘除法简单混合运算应用题Shape275

【方法点拨】Shape276

该类题型的关键是找出单位“1”,分清单位“1”是否已知,如果单位“1”已知,用分数乘法计算,如果单位“1”未知,用分数除法计算。Shape277

【典型例题】Shape278

一辆汽车从甲地开往乙地行驶了560千米,正好是全程的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape279 ;如果另一辆货车从乙地开往甲地,正好行驶了全程的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 。这辆货车行驶了多少千米?

解析:560÷ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape280 × <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =245(千米)

答:略。Shape281

Shape282

Shape283

Shape284

Shape285

【对应练习1Shape286

王芳和李明是集邮爱好者,王芳发现自己邮票的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape287 正好是80枚.她准备把邮票的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 拿出来和李明交换.王芳准备交换多少枚邮票?

解析:80÷ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape288 × <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =60(枚)

答:略。Shape289

Shape290

【对应练习2Shape291

妈妈今年40岁,妈妈的年龄是爸爸年龄的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape292 ,小君的年龄是爸爸年龄的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> .小君今年多少岁?

解析:40÷ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape293 × <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =9(岁)

答:略。Shape294

Shape295

【对应练习3Shape296

甲数的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape297 是乙数的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> ,乙数是40,甲数是多少?

解析:40× <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> Shape298 ÷ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =36

Shape299

【考点十】已知比一个数的几分之几多或少多少是多少,求这个数。Shape300

【方法点拨】Shape301

该类题型的关键是找出单位“1”,分清单位“1”是否已知,如果单位“1”已知,用分数乘法计算,如果单位“1”未知,用分数除法计算。Shape302

【典型例题】Shape303

六年级学生参加植树劳动,女生植了161棵,女生植的树比男生的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 5棵。男生植树多少棵?Shape304

解析:(161-5÷ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =208(棵)Shape305

答:略。Shape306

【对应练习1Shape307

修一条公路,已修了460米,比全长的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 20米,这条路一共有多少米?Shape308

解析:(460+20÷ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =640(米)Shape309

答:略。Shape310

Shape311

【对应练习2Shape312

一堆煤,烧了8吨,比这堆煤的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 16吨,这堆煤有多少吨?Shape313

解析:(8+16÷ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =40(吨)Shape314

答:略。Shape315

Shape316

【对应练习3Shape317

加工一批零件,已经做好了456个,比计划的 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> 3,这批零件共有多少个?Shape318

解析:(456-3÷ <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/96/" title="典型" class="c1" target="_blank">典型</a> <a href="/tags/97/" title="系列" class="c1" target="_blank">系列</a> <a href="/tags/98/" title="例题" class="c1" target="_blank">例题</a> <a href="/tags/144/" title="分数" class="c1" target="_blank">分数</a> =755(个)Shape319

答:略。Shape320

Shape321

Shape322

Shape323

Shape324

Shape325

Shape326

Shape327

Shape328

关注”试卷家“微信公众号免费下载试卷

《【321245】六年级数学上册典型例题系列之第三单元分数除法应用题基础部分(解析版).doc》
将本文的Word文档下载到电脑,方便收藏和打印
推荐度:
点击下载文档
最新推荐
猜你喜欢
一键复制下载文档联系客服
直接下载
单次下载
0.5元/次
微信支付
免费下载
公众号:试卷家复制
复制微信公众,搜索即可关注!
关注微信公众号获取验证码
欢迎使用微信支付
扫一扫支付
金额:
常见问题

请登录之后再下载!

下载中心

您的账号注册成功!密码为:123456,当前为默认信息,请及时修改

下载文件立即修改

帮助中心

如何获取自己的订单号?

打开微信,找到微信支付,找到自己的订单,就能看到自己的交易订单号了。

阅读并接受《用户协议》
注:各登录账户无关联!请仅用一种方式登录。


用户注册协议

一、 本网站运用开源的网站程序平台,通过国际互联网络等手段为会员或游客提供程序代码或者文章信息等服务。本网站有权在必要时修改服务条款,服务条款一旦发生变动,将会在重要页面上提示修改内容或通过其他形式告知会员。如果会员不同意所改动的内容,可以主动取消获得的网络服务。如果会员继续享用网络服务,则视为接受服务条款的变动。网站保留随时修改或中断服务而不需知照会员的权利。本站行使修改或中断服务的权利,不需对会员或第三方负责。

关闭