40.7减2.6以9.3简便算法怎么算

分类: 作业答案 • 2021-12-18 22:46:31

问题描述：

40.7减2.6以9.3简便算法怎么算

答

40.7减2.6以9.3
=40.7-2.6×（10-0.7）
=40.7-2.6×10+2.6×0.7
=40.7-26+1.82
=14.7+1.82
=16.52