3.25×4.7-7.8的简便计算方法

2025-03-29 12:26:12
推荐回答(1个)
回答1:

3.25×4.7-7.8
=3.25×4.7-13.25×2.4
=3.25×(4.7-2.4)
=3.25×2.3
=3.25×2+3.25×0.3
=6.5+0.975
=7.475