40.7减2.6以9.3简便算法怎么算

2025-04-12 22:49:38
推荐回答(1个)
回答1:

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