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【319903】三年级下册数学单元测试-第五单元 面积(基础卷) 人教版(含答案)

时间:2025-01-07 23:45:11 作者: 字数:8590字
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 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> 三年级下册数学单元测试-第五单元 面积(基础卷)

(完成时间:60分钟,总分:100分)

一.选择题(满分16分,每小题2分)

1.比一比下面两个图形的面积.结果是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>    <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

A <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> B <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> C <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

2.课桌桌面约 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>    <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

A.平方米 B.平方厘米 C.平方分米 D.米

3.一个正方形的面积是64平方厘米,那么它的边长是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>    <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

A16厘米 B8厘米 C8平方厘米

4.正方形的边长扩大到原来的2倍,则它的面积 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>    <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

A.扩大到原来的2 B.扩大到原来的3

C.扩大到原来的4

5.一块面积是90平方米的长方形草地,如果长扩大到原来的2倍,宽扩大到原来的3倍,扩大后的草地面积是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>    <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> 平方米.

A540 B450 C270 D180

6.正方形的面积是64平方分米,边长一定是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>    <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

A8平方分米 B8分米 C16分米 D4分米

7.下面是三块铁皮的面积,哪块铁皮的面积最接近1平方米? <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>    <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

A9平方分米 B90平方分米 C900平方分米

820平方米是 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>    <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> 计算的结果.

A.长度 B.面积 C.质量

二.填空题(满分16分,每小题2分)

9.如图中阴影部分的面积大约是  平方厘米.(每小格边长1厘米)

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

10.物体的    的大小,就是它们的面积.

11.教室面积大约是60  

12.一个长方形,如果宽增加4厘米,面积就增加36平方厘米,这时恰好变成一个正方形,原来长方形的长是   厘米。

13.如图, <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> ,一个长65米,宽45米的长方形鱼塘,如果把它扩建成正方形鱼塘,面积至少增加   平方米。

14.一个长方形面积是24平方分米,长6分米,宽  分米,周长是  

155000平方分米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>   平方米;600平方厘米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>   平方分米。

16.从一个长18厘米,宽15厘米的长方形纸上剪下一个最大的正方形,这个正方形的面积是   ,剩下图形的面积是   

三.判断题(满分8分,每小题2分)

17.小明家客厅地面长6米,宽3米.用边长3分米的方砖铺满地面,一共需要200块方砖.   

18.边长是25厘米的正方形,它是面积是100厘米.   

19.边长相等的正方形,面积和周长都相等.   

20.一个正方形的边长扩大2倍,面积就扩大4倍.   

四.计算题(满分12分,每小题12分)

21.(12分)计算下面图形的面积。

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

五.操作题(满分12分,每小题12分)

22.(12分)下面每个□代表1平方厘米.请在下面方格纸上,画出3个面积是12平方厘米的长方形.算出它们的周长,填入表中.

图形

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

面积 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

周长 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

1

12

1

12

26

2

   

   

   

   

3

   

   

   

   

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

六.解答题(满分36分,每小题6分)

23.(6分)下面这块长方形菜地的宽增加到36米,长不变,扩大后的面积是多少? <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

24.(6分)有一条宽2米的道路占地面积480平方米.为了方便人们行走,道路的宽度要增加到6米,长不变.拓宽后这条道路的面积是多少平方米?

25.(6分)一个长为12厘米的长方形的面积比边长是12厘米的正方形面积少36平方厘米.这个长方形的宽是多少厘米?

26.(6分)一块长方形的麦田,宽是25米,长是宽的4倍,这块长方形地的面积是多少平方米?

27.(6分)有一个长方形鱼池的长是52米,为了扩大水面,现在又把长增加了8米,面积就增加了360平方米.这个鱼池原来的面积是多少平方米?

28.(6分)花园里有一个正方形的荷花池.它的周长是64米,面积是多少平方米?



参考答案

一.选择题(满分16分,每小题2分)

1解:图4个小方格,图4个小方格,

所以图 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

答案: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

2解:由分析可知:课桌桌面约50平方分米;

答案: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

3解:因为8的平方是64,所以正方形的边长是8厘米.

答:它的边长是8厘米.

答案: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

4解:设原来的边长为 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

原正方形的面积: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

扩大后正方形的面积: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

答:面积扩大到原来的4倍.

答案: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

5解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方米)

答:扩大后的草地面积是540平方米.

答案: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

6解:正方形的面积是64平方分米,

根据乘法口诀可知, <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

所以正方形的边长是8分米.

答案: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

7解:9平方分米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> 平方米,与1平方米相差 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方米)

90平方分米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> 平方米,与1平方米相差 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方米)

900平方分米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> 平方米,与1平方米相差 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方米)

0.1平方米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> 平方米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> 平方米

因此,90平方分米更接近1平方米.

答案: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

8解:20平方米是面积的计算结果.

答案: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

二.填空题(满分16分,每小题2分)

9解:正中间两行阴影部分的面积大约是12平方厘米,

最上面和最下面阴影部分的面积大约相当于4个方格的面积,即4平方厘米,

因为 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方厘米),

所以图中阴影部分的面积大约是16平方厘米.

答:图中阴影部分的面积大约是16平方厘米.

答案:16

10解:物体的(表面)或(封闭图形)的大小,就是它们的面积.

答案:表面,封闭图形.

11解:教室面积大约是60平方米.

答案:平方米.

12解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (厘米)

答:原来长方形的长是9厘米。

答案:9

13解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方米)

答:面积至少增加1300平方米。

答案:1300

14解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (分米)

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (分米)

答:宽是4分米,周长是20分米。

答案:420分米。

15解:5000平方分米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> 平方米;

600平方厘米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> 平方分米。

答案:506

16解:根据题意画图如下:

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

正方形的面积:

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方厘米)

剩下部分的面积:

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方厘米)

答:这个正方形的面积是225平方厘米,剩下图形的面积是45平方厘米.

答案:225平方厘米,45平方厘米.

三.判断题(满分8分,每小题2分)

17解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方米)

18平方米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> 平方分米

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方分米)

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (块 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

答:一共需要200块方砖.

所以题干的说法是错误的.

答案: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

18解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方厘米)

答:它的面积是625平方厘米.

答案: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

19解:据分析可知:

边长相等的正方形,面积和周长都相等,翻译题干的说法是正确的;

答案: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

20解:设原正方形的边长为 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> ,则扩大后的边长为 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

原正方形的面积 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

边长扩大后的正方形的面积 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

面积扩大: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

答:一个正方形的边长扩大2倍,面积就扩大4倍.

答案: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

四.计算题(满分12分,每小题12分)

21解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方米)

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方分米)

答:正方形的面积是49平方米,长方形的面积是33平方分米。

五.操作题(满分12分,每小题12分)

22解:因为 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> ,所以长方形的长和宽可以分别为12厘米、6厘米、4厘米和1厘米、2厘米、3厘米,

所以它们的周长分别为:

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (厘米)

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (厘米)

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (厘米)

答案:

图形

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

面积 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

周长 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

1

12

1

12

26

2

6

2

12

16

3

4

3

12

14

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

六.解答题(满分36分,每小题6分)

23解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方米)

答:扩大后的菜地面积是1512平方米.

24解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方米)

答:扩宽后这条人行道的面积是1440平方米.

25解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (厘米),

答:这个长方形的宽是9厘米.

26解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方米),

答:这块长方形地的面积是2500平方米.

27解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方米)

答:这个鱼池原来的面积是2340平方米.

28解: <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (米 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a>

 <a href="/tags/1/" title="单元" class="c1" target="_blank">单元</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/105/" title="面积" class="c1" target="_blank">面积</a> <a href="/tags/197/" title="基础" class="c1" target="_blank">基础</a> (平方米)

答:这个荷花池的面积是256平方米.

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