2.8×12.5的简便计算

2025-04-06 08:42:10
推荐回答(2个)
回答1:

2.8x12.5
=2x12.5+0.8x12.5
=25+10
=35

回答2:

2.8×12.5=0.7×4×12.5=0.7×50=35