1.28乘0.9加0.128怎样用简便方法计算?

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1.28乘0.9加0.128怎样用简便方法计算?1.28乘0.9加0.128怎样用简便方法计算?1.28乘0.9加0.128怎样用简便方法计算?1.28*0.9+0.128=1.28*0.9+1.28

1.28乘0.9加0.128怎样用简便方法计算?
1.28乘0.9加0.128怎样用简便方法计算?

1.28乘0.9加0.128怎样用简便方法计算?
1.28*0.9+0.128=1.28*0.9+1.28*0.1=1.28*(0.9+0.1)=1.28