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四年级下册数学练习三怎么做
更新时间: 2021-04-07 09:20:10  

第一种算法:先算每个小组里有多少人。

(4+2)×25

= 6×25

= 150(人)

第二种算法:先分别算出负责挖坑、种树的人数和负责抬水、浇树的人数。

4×25+2×25

= 100+50

= 150(人)

关键词: 年级 下册 数学 练习 怎么

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