12.5乘以0.25加1.25乘7.5用简便计算怎么算?简便计算

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12.5乘以0.25加1.25乘7.5用简便计算怎么算?简便计算

12.5乘以0.25加1.25乘7.5用简便计算怎么算?简便计算
12.5乘以0.25加1.25乘7.5用简便计算怎么算?
简便计算

12.5乘以0.25加1.25乘7.5用简便计算怎么算?简便计算
12.5×0.25+1.25×7.5
=1.25×2.5+1.25×7.5
=1.25×(2.5+7.5)
=1.25×10
=12.5

原式=1.25*2.5+1.25*7.5=1.25*(2.5+7.5)=12.5

12.5*0.25+1.25*7.5
=1.25*2.5+1.25*7.5
=1.25*(2.5+7.5)
=1.25*10
=12.5

12.5*0.25+1.25*7.5
=12.5*0.25+12.5*0.75
=12.5*(0.25+0.75)
=12.5*1
=12.5

12.5×0.25+12.5×0.75
=12。5×(0.25+0.75)
=12.5×1
=12.5