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一年级下册的计算题进位退位怎么做
更新时间: 2021-03-24 21:53:55  

1、列竖式计算进位加法时要注意:(1)相同数位要对齐;(2)从个位加起,(3)个位相加满十,要向十位进一。

2、列竖式计算退位减法时要注意:(1)相同数位要对齐;(2)从个位减起;(3)个位不够减,要向十位借一。

关键词: 年级 下册 计算 退位 怎么

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