4.3×1.3+5.65×13用简便算法怎么算?
1个回答
2019-12-30
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4.3×1.3+5.65×1.3简便计算?
解:原式=4.3×1.3+5.65×10×1.3
=1.3×(4.3+56.5)
=1.3×60.8
=1.3×(60+0.8)
=1.3×60+1.3×0.8
=78+1.04
=79.04
乘法结合律计算
解:原式=4.3×1.3+5.65×10×1.3
=1.3×(4.3+56.5)
=1.3×60.8
=1.3×(60+0.8)
=1.3×60+1.3×0.8
=78+1.04
=79.04
乘法结合律计算
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