6.3乘99用简便方法计算,怎么算?

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6.3乘99用简便方法计算,怎么算?6.3乘99用简便方法计算,怎么算?6.3乘99用简便方法计算,怎么算?6.3x99=6.3x(100-1)=6.3x100-1x6.3=630-6.3=623.7

6.3乘99用简便方法计算,怎么算?
6.3乘99用简便方法计算,怎么算?

6.3乘99用简便方法计算,怎么算?
6.3x99
=6.3x(100-1)
=6.3x100-1x6.3
=630-6.3
=623.7
5.6*101
=5.6(100+1)
=560+5.6
=565.6