0.6327+1.9（4.3-2.2）的简便算法

分类: 作业答案 • 2022-02-21 22:16:15

问题描述：

0.63*27+1.9*（4.3-2.2）的简便算法

答

0.63*27+1.9*（4.3-2.2）
=0.63*27+1.9*2.1
=6.3x2.7+1.9x2.1
=2.1x3x2.7+1.9x2.1
=2.1x(8.1+1.9)
=2.1x10
=21

答

0.63*27+1.9*（4.3-2.2）
=0.63*27+1.9*2.1
=2.1*8.1+1.9*2.1
=2.1*（8.1+1.9）
=2.1*10
=21

0.63*27+1.9*（4.3-2.2）的简便算法