1.1乘66+78乘3.3用简便算法怎么做

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1.1乘66+78乘3.3用简便算法怎么做
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1.1乘66+78乘3.3用简便算法怎么做
1.1乘66+78乘3.3用简便算法怎么做

1.1乘66+78乘3.3用简便算法怎么做
1.1*66+78*3.3
=1.1*3*22+78*3.3
=3.3*(22+78)
=3.3*100
=330

=3.3*22+78*3.3
=3.3*(22+78)=330

66=3*22
so:1.1*66=1.1*3*22=3.3*22
so:1.1*66+78*3.3=3.3*(22+78)=3.3*100=330

=3.3×22+78×3.3
=3.3×(22+78)
=330