简便:四分之五乘五又九分之二加1.25乘三又九分之七减五除以四

2024-11-15 15:02:04
推荐回答(2个)
回答(1):


答案为10

回答(2):

5/4x5又2/9+1.25x3又7/9-5/4
=5/4x5又2/9+5/4x3又7/9-5/4
=5/4x(5又2/9+3又7/9-1)
=5/4x8
=10