a.
\(-\frac{3}{5}+\left(\frac{-2}{5}+2\right)=-\frac{3}{5}-\frac{2}{5}+2=-\frac{5}{5}+2=-1+2=1\)
b.
\(-\frac{5}{11}+\left(\frac{-6}{11}+1\right)=-\frac{5}{11}-\frac{6}{11}+1=-\frac{11}{11}+1=-1+1=0\)Chúc bạn học tốt ^^
A) -3/5+(-2/5+2)
= -3/5+8/5
= 1
B) -5/11+(-6/11+1)
= -5/11+5/11
= 10/11