这两题怎么写?

2025-05-13 21:01:23
推荐回答(1个)
回答1:

(1)=(-14-6)+(3.2+3.5+0.3)
=-20+7
=-13
(2)=(1/2-1/4)-(1/3+2/3)
=(2/4-1/4)-1
=1/4-1
=-3/4