Question

a. 2/7+5/9

B. 2/3 -4/5

C . 3/4 : 2/7

 

Answer 1

\(\dfrac{2}{7}+\dfrac{5}{9}=\dfrac{18+35}{63}=\dfrac{53}{63}\)

\(\dfrac{2}{3}-\dfrac{4}{5}=\dfrac{10-12}{15}=-\dfrac{2}{15}\)

\(\dfrac{3}{4}:\dfrac{2}{7}=\dfrac{3}{4}\times\dfrac{7}{2}=\dfrac{21}{8}\)

Answer 2

a, \(\dfrac{2}{7}+\dfrac{5}{9}=\dfrac{18}{63}+\dfrac{35}{63}=\dfrac{53}{63}\)

b, \(\dfrac{2}{3}-\dfrac{4}{5}=\dfrac{10}{15}-\dfrac{12}{15}=\dfrac{-2}{15}\)

c, \(\dfrac{3}{4}:\dfrac{2}{7}=\dfrac{3}{4}\times\dfrac{7}{2}=\dfrac{21}{8}\)