Question

quy đồng mẫu các phân số sau 1/2,1/3,-1/12

Answer 1

\(\dfrac{1}{2}=\dfrac{1\cdot6}{2\cdot6}=\dfrac{6}{12}\)

\(\dfrac{1}{3}=\dfrac{1\cdot4}{3\cdot4}=\dfrac{4}{12}\)

\(\dfrac{-1}{12}=\dfrac{-1\cdot1}{12\cdot1}=\dfrac{-1}{12}\)

Answer 2

Mẫu chung = 12

\(\dfrac{1}{2}=\dfrac{1.6}{2.6}=\dfrac{6}{12}\)

\(\dfrac{1}{3}=\dfrac{1.4}{3.4}=\dfrac{4}{12}\)

Ta có : \(\dfrac{6}{12},\dfrac{4}{12},\dfrac{-1}{12}\)