12.7*4.36-12.7*3.3用简便方法计算

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12.7*4.36-12.7*3.3用简便方法计算
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12.7*4.36-12.7*3.3用简便方法计算
12.7*4.36-12.7*3.3用简便方法计算

12.7*4.36-12.7*3.3用简便方法计算
12.7*4.36-12.7*3.3
=12.7*(4.36-3.3)
=12.7*(1.06)
=12.7*(1+0.05+0.01)
=12.7+12.7/20+0.127
=12.827+0.635
=13.462