“54.9×0.38=”用简便计算怎么算?

2025-03-11 06:55:25
推荐回答(2个)
回答1:

54.9*0.38
=(50+5-0.1)*0.38
=50*0.38+5*0.38-0.1*0.38
=19+1.9-0.038
=20.862

回答2:

哦,还好。!