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51问答网 > 700减189竖式计算七后面两个零怎样借位

700减189竖式计算七后面两个零怎样借位

2025-04-01 08:02:19

推荐回答（2个）

回答1：

竖式计算减法时，相同数位要对齐，从个位减起，被减数的个位不够减时，往前一位借位，相当于给这位数加上10，再进行计算。

700减189，个位的0减9不够减，向十位借1，十位上是0，向百位退1做10，再从退下的10中退1到个位作10，十位只剩下9。个位：10－9＝1；十位：9－8＝1；百位：6－1＝5。

回答2：

700
- 189
----------
511
最后一个0向前面一个0借位，倒数第二的0向7借位，即7变成6，倒数第二个0变成9，最后的0变成10

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