三又3⼀4×8-3又3⼀4 3×3.75用简便方法?

2025-05-19 17:20:29
推荐回答(1个)
回答(1):

三又3/4×8-3又3/4 +3×3.75
=3.75x8-3.75+3.75x3
=3.75x(8-1+3)
=3.75x10
=37.5