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35减2和35减20有什么不同

更新时间: 2019-04-09 00:00:00     

结果不同。35-2在计算时只需要对个位进行加减:结果为33。35-20时需要对个位十位分别进行计算:结果为15。

35-2和35-20计算时有什么不同

35-2

=30+5-2

=30+3

=33

35-20

=5+30-20

=5+10

=15

关键词: 什么 不同

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