2.5乘1.2加75乘0.125简便计算 - 知识问答

2.5乘1.2加75乘0.125简便计算

2个回答

2.5×1.2+75×0.125
=1.25×2.4+75×0.125
=0.125×24+75×0.125
=（24+75）×0.125
=99×0.125
=100×0.125-0.125
=12.5-0.125
=12.375

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