Question

15/7+5/6+2/7+7/6

Answer 1

tính bằng cách thuận tiện nhất nhé các bạn

 

Answer 2

\(\dfrac{15}{7}+\dfrac{5}{6}+\dfrac{2}{7}+\dfrac{7}{6}=\left(\dfrac{15}{7}+\dfrac{2}{7}\right)+\left(\dfrac{5}{6}+\dfrac{7}{6}\right)=\dfrac{17}{7}+2=\dfrac{17+14}{7}=\dfrac{31}{7}\)