72×209-1.8×73.6的简便计算

分类: 作业答案 • 2021-12-20 01:20:10

问题描述：

答

勇于改变的味道
回答的非常到位了。

答

72*2.09-1.8*73.6
=1.8*40*2.09-1.8*73.6
=1.8*(40*2.09-73.6)
=1.8*(83.6-73.6)
=1.8*10
=18

答

72*2.09-1.8*73.6
=1.8*40*2.09-1.8*73.6
=1.8*(40*2.09-73.6)
=1.8*(83.6-73.6)
=1.8*10
=18
投我一票