1.58*9.9+0.158怎样简算
1个回答
2014-10-01
展开全部
1.58*9.9+0.158
=1.58*(10-0.1)+0.158
=1.58*10-1.58*0.1+0.158
=15.8-0.158+0.158
=15.8
=1.58*(10-0.1)+0.158
=1.58*10-1.58*0.1+0.158
=15.8-0.158+0.158
=15.8
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