负三点七五加上2.85加负一又四分之一加负二分之一加三点一五加﷿

2025-06-29 04:09:41
推荐回答(1个)
回答1:

-3.75+2.85+(-1又1/4)+(-1/2)+3.15
=(-3.75-1又1/4)+(2.85+3.15)+(-1/2)
=-5+6-1/2
=1/2