8/11 + -6/11 x 4/13 - 4/11 x 7/13

Đáp án: $\frac{8}{11}$ +$\frac{-6}{11}$ x$\frac{4}{13}$ x$\frac{7}{13}$ 

=$\text{$\frac{8}{11}$ +$\frac{-24}{143}$ -$\frac{28}{143}$ }$

=$\text{$\frac{8}{11}$ +($\frac{-24}{143}$ -$\frac{28}{143}$ }$

=$\text{$\frac{8}{11}$ +$\frac{-4}{11}$ }$

=$\text{$\frac{4}{11}$ }$

$\text{Học Tốt!!!}$

 #lekhanhhoa