50.3*2.9-2.8有简便算法么?

2025-04-13 02:03:59
推荐回答(1个)
回答1:

50.3*2.9-2.8
=50.3*(3-0.1)-2.8
=50.3*3-50.3*0.1-2.8
=15.09-5.03-2.8
=10.06-2.8
=7.26