0.54乘0.54+0.54乘0.46 15.7乘9.9+1.57 简便计算

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0.54乘0.54+0.54乘0.4615.7乘9.9+1.57简便计算0.54乘0.54+0.54乘0.4615.7乘9.9+1.57简便计算0.54乘0.54+0.54乘0.4615.7乘9.9+

0.54乘0.54+0.54乘0.46 15.7乘9.9+1.57 简便计算
0.54乘0.54+0.54乘0.46 15.7乘9.9+1.57 简便计算

0.54乘0.54+0.54乘0.46 15.7乘9.9+1.57 简便计算
gaofei494 ,
0.54×0.54+0.54×0.46
=0.54×(0.54+0.46)
=0.54×1
=0.54
15.7×9.9+1.57
=1.57×99+1.57
=1.57×(99+1)
=1.57×100
=157

=0.54x(0.54+0.46)
=0.54x1
=0.54


=1.57x99+1.57
=1.57x(99+1)
=1.57x100
=157

希望能帮你忙,不懂请追问,懂了请采纳,谢谢

0.54X(0.54+0.46)=0.54X1=0.54, 1.57X(99+1)=157