-4/155

B=522+313−12413−211+32

 Đặt \(S=\frac{5}{22}+\frac{3}{13}-\frac{1}{2}\)

=> S= \(\frac{-6}{143}\)

Đặt \(H=\frac{4}{13}-\frac{2}{11}+\frac{3}{2}\)

=> H = \(\frac{465}{286}\)

Khi đó B = \(\frac{\frac{-6}{143}}{\frac{465}{286}}\)=\(\frac{-4}{155}\)

\(\frac{\frac{5}{22}+\frac{3}{13}-\frac{11}{22}}{\frac{4}{13}-\frac{4}{22}+\frac{33}{22}}=\frac{\left(\frac{5}{22}-\frac{11}{12}\right)+\frac{3}{13}}{\frac{4}{13}-\left(\frac{4}{22}-\frac{33}{22}\right)}=\frac{\frac{-6}{22}+\frac{3}{13}}{\frac{4}{13}+\frac{29}{22}}=\frac{\frac{-6}{143}}{\frac{465}{286}}=\frac{-4}{155}\)

Bạn bấm máy tính cũng được mà!

\(\frac{\left(\frac{5}{22}+\frac{3}{13}-\frac{1}{2}\right)\cdot22\cdot13\cdot11}{\left(\frac{\text{4}}{13}-\frac{2}{11}+\frac{3}{2}\right)\cdot22\cdot13\cdot11}=\frac{715+726-1573}{968-572+4719}=\frac{-132}{5115}=\frac{-4}{155}\)

k mk đi làm ơn 

mk đang bị âm điểm

\(\frac{\frac{5}{22}+\frac{3}{13}-\frac{1}{2}}{\frac{4}{13}-\frac{2}{11}+\frac{3}{2}}=\frac{2.11.13\left(\frac{5}{22}+\frac{3}{13}-\frac{1}{2}\right)}{2.11.13\left(\frac{4}{13}-\frac{2}{11}+\frac{3}{2}\right)}=\frac{65+66-143}{88-52+429}=\frac{-12}{465}=\frac{-4}{155}\)