6.58*99.9+0.658用简便计算怎么做 - 知识问答

6.58*99.9+0.658用简便计算怎么做

4个回答

6.58*99.9+0.658
=6.58*99.9+0.658*1
=6.58*99.9+6.58*0.1
=6.58*(99.9+0.1)
=6.58*100
=658

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