2.5×(0.4+0.8)×12.5怎样简便计算

2025-03-11 09:30:01
推荐回答(1个)
回答1:

原式
=2.5x0.4x12.5+2.5x0.8x12.5
=1x12.5+2.5x10
=12.5+25
=37.5