2.5×6.7 3.3×25怎么简便计算

2025-04-02 22:31:00
推荐回答(1个)
回答1:

2.5×6.7+3.3×25
=2.5×6.7+33×2.5
=2.5×(6.7+33)
=2.5×39.7
=2.5×(40-0.3)
=2.5×40-2.5×0.3
=100-0.75
=99.25