(1.5+5⼀3)÷2.5-0.5求答案

2025-01-20 22:01:01
推荐回答(1个)
回答1:

(1.5+5/3)÷2.5-0.5
=1.5/2.5+5/2.5/3-0.5
=3/5+2/3-1/2
=9/15+10/15-1/2
=19/15-1/2
=28/30-15/30
=13/30