1.25乘以(2又5分之二减2分之一)+10分之11除以二

2025-12-18 05:17:01
推荐回答(1个)
回答1:

5/4 x (12/5-1/2)+11/10 x 1/2
=3-5/8+11/20
=3-25/40+22/40
=3-3/40
=117/40