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【321218】六年级数学上册第三单元分数除法简便计算典型例题(学生版)

时间:2025-01-08 19:35:47 作者: 字数:2156字

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六年级数学上册第三单元分数除法简便计算Shape1

典型例题Shape2

整数、小数、分数的简便计算运算定律、运算性质:Shape3

运算定律

运算性质

加法交换律:a+b=b+a

减法运算性质:

a-b-c=a-(b+c)

a-(b-c)=a-b+c

加法结合律:a+b+c=a+(b+c)

乘法交换律:a×b=b×a

除法运算性质:

a÷b÷c=a÷(b×c)

a÷(b÷c)=a÷b×c

(a+b)÷c=a÷c+b÷c

(a-b)÷c=a÷c-b÷c

乘法结合律:a×b×c=a×(b×c)

乘法分配律:

(a+b)×c=a×c+b×c

(a-b)×c=a×c-b×c

1.简便计算类型一:“分数除法化成分数乘法,再简便计算”。Shape4

【例题1÷ ÷ Shape5

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【对应练习】Shape16

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【例题2 Shape23

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【对应练习】Shape29

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【例题3 Shape39

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【对应练习】Shape45

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2. 简便计算类型二:“带分数化成假分数,再简便计算”。Shape53

【例题】2020÷2020 Shape54

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【对应练习】Shape61

22÷ Shape62

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2021÷2021 Shape73

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3. 简便计算类型三:“带分数化加式,再简便计算”。Shape79

【例题】2020 ÷2020Shape80

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【对应练习】Shape85

32÷32 16 Shape86 ÷8 ÷3

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4. 简便计算类型四:“提取分数单位,再整体约分”。Shape92

【例题】 ÷ Shape93

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【对应练习】Shape98

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5. 简便计算类型五:“带分数化加式,再凑分数约分”。Shape114

【例题】60 ÷29Shape115

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【对应练习】Shape120

84 Shape121 ÷41 2010

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