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五年级数学下册9总复习补充习题（2）新人教版.doc

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1第 9 单元 总复习用 3 个长 5cm,宽 4cm,高 3cm 的长方体木块，拼成一个表面积最小的长方体。这个长方体的表面积是多少平方厘米？答：这个长方体的表面积是（ ）平方厘米。答案提示：545（33）4（33）2（204536）2202（cm）答：这个长方体的表面积是 202 平方厘米。解题思路：先想：怎样才能拼成一个表面积最小的长方体？答案如下：23

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