Question

8/9-1/3-5/18=...

Answer 1

\(=\dfrac{16}{18}-\left(\dfrac{6}{18}+\dfrac{5}{18}\right)=\dfrac{16}{18}-\dfrac{11}{18}=\dfrac{5}{18}\)

Answer 2

Mẫu số chung : 18 

\(\dfrac{8}{9}=\dfrac{8\times2}{9\times2}=\dfrac{16}{18}\)

\(\dfrac{1}{3}=\dfrac{1\times6}{3\times6}=\dfrac{6}{18}\)

\(\dfrac{5}{18}\)

\(=\dfrac{16}{18}-\dfrac{6}{18}-\dfrac{5}{18}\)

\(=\dfrac{5}{18}\)