Question

Quy đồng các phân số sau:

a]17/60 và 4/5

b]5/6 và 9/8

c]1/2;2/3 và 3/4

d]1/2;2/3 và 7/12

Answer 1

a.\(\dfrac{17}{60}=\dfrac{17}{60}\)
\(\dfrac{4}{5}=\dfrac{4\times12}{5\times12}=\dfrac{48}{60}\)
b.\(\dfrac{5}{6}=\dfrac{5\times4}{6\times4}=\dfrac{20}{24}\)
\(\dfrac{9}{8}=\dfrac{9\times3}{8\times3}=\dfrac{27}{24}\)
c.\(\dfrac{1}{2}=\dfrac{1\times6}{2\times6}=\dfrac{6}{12}\)
\(\dfrac{2}{3}=\dfrac{2\times4}{3\times4}=\dfrac{8}{12}\)
\(\dfrac{3}{4}=\dfrac{3\times3}{4\times3}=\dfrac{9}{12}\)
d.\(\dfrac{1}{2}=\dfrac{1\times6}{2\times6}=\dfrac{6}{12}\)
\(\dfrac{2}{3}=\dfrac{2\times4}{3\times4}=\dfrac{8}{12}\)
\(\dfrac{7}{12}=\dfrac{7}{12}\)