Question

Giúp tiếp các bạn 6/18 + -14/21

Answer 1

\(\dfrac{6}{18}+\left(-\dfrac{14}{21}\right)=\dfrac{42}{126}+\left(-\dfrac{84}{126}\right)=-\dfrac{42}{126}=-\dfrac{1}{3}\)

Answer 2

\(\dfrac{6}{18}+\dfrac{-14}{21}=\dfrac{1}{3}+\dfrac{-2}{3}=\dfrac{1+\left(-2\right)}{3}=\dfrac{-1}{3}\)