Thực hiện phép tính: 7/36 - (-8/9) + (-2/3) = 7/36 + 8/9 + (-2)*12/3*12

* Hướng dẫn giải

$\frac{7}{36}-\frac{8}{-9}+\frac{-2}{3}$

$=\frac{7}{36}-\frac{-8}{9}+\frac{-2}{3}$

$=\frac{7}{36}+\frac{8}{9}+\frac{-2}{3}$

$=\frac{7}{36}+\frac{8.4}{9.4}+\frac{(-2).12}{3.12}$

$=\frac{7}{36}+\frac{32}{36}+\frac{-24}{36}$

$=\frac{7+32+(-24)}{36}$

$=\frac{15}{36}$

$=\frac{3.5}{3.12}$

$=\frac{5}{12};$