3.9+0.1减3.9+0.1怎么巧算
发布网友
共2个回答
热心网友
3.9+0.1-3.9+0.1
=（3.9-3.9）+（0.1+0.1）
=0+0.2
=0.2
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热心网友
3.9+0.1-3.9+0.1
=(3.9-3.9)+0.1+0.1
=0.2
