3⼀13×4⼀5+3⼀13×0.8-4⼀5怎样笔算?

2025-03-11 00:31:42
推荐回答(1个)
回答1:

3/13×4/5+3/13×0.8-4/5
=3/13×4/5+3/13×4/5-4/5
=(3/13+3/13-1)x4/5
=-7/13x4/5
=-28/65