简便计算:4.02乘以35= 48乘以0.25乘以1.25= 8.9乘以9+8.9=

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简便计算:4.02乘以35= 48乘以0.25乘以1.25= 8.9乘以9+8.9=
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简便计算:4.02乘以35= 48乘以0.25乘以1.25= 8.9乘以9+8.9=
简便计算:4.02乘以35= 48乘以0.25乘以1.25= 8.9乘以9+8.9=

简便计算:4.02乘以35= 48乘以0.25乘以1.25= 8.9乘以9+8.9=
4.02*35=(4+0.02)*35=4*35+0.02*35=140+0.7=140.7
48*0.25=40*0.25*8*0.25=10+2=12
8.9*9+8.9=8.9*(9+1)=89

4.02乘以35= 4.02*5*7=20.1*7=140.7
48乘以0.25乘以1.25= (48/4)*1.25=12*5/4=15
8.9乘以9+8.9= 8.9*(9+1)=8.9*10=89

4.02×35=4.02×5×7=20.1×7=140.7
48×0.25×1.25=(40+8)×0.25×1.25=40×0.25×1.25+8×1.25×0.25=10×1.25+10×0.25=10×(1.25+0.25)=10×1.5=15
8.9×9+8.9=8.9×(9+1)=8.9×10=89