新人求解答

2025-12-17 08:18:51
推荐回答(1个)
回答1:

=5/9-6/9+1/4=﹣1/9+1/4=﹣4/36+9/36=5/36

=(3.2+6.8)+(2/5+3/5)=10+1=11

=1-1/2+1/3+1/2=1+1/3=4/3