24.5+15.5乘1.2的简便计算

分类: 作业答案 • 2022-01-02 16:21:53

问题描述：

24.5+15.5乘1.2的简便计算

答

24.5+15.5乘1.2
=24.5+15.5x1.2
=24.5+14.5x(1+0.2)
=24.5+15.5+2.9
=42.9

答

(24.5+15.5)x1.2
=(20+10)x1.2
=20x1.2+20x1.2
=48

答

24.5+15.5乘1.2
=24.5+15.5x1.2
=24.5+15.5x(1+0.2)
=24.5+15.5+3.1
=43.1