Question

 

Quy đồng mẫu số các phân số sau :

a, 2/3, 1/4 và 3/5
b, 1/6, 2/5 và 3/11

Answer 1

a)\(\frac{2}{3}=\frac{2\times20}{3\times20}=\frac{40}{60}\)

\(\frac{1}{4}=\frac{1\times15}{4\times15}=\frac{15}{60}\)

\(\frac{3}{5}=\frac{3\times12}{5\times12}=\frac{36}{60}\)

Answer 2

b)\(\frac{1}{6}=\frac{1\times55}{6\times55}=\frac{55}{330}\)

\(\frac{2}{5}=\frac{2\times66}{5\times66}=\frac{132}{330}\)

\(\frac{3}{11}=\frac{3\times30}{11\times30}=\frac{90}{330}\)

Answer 3

\(\frac{2}{3}=\frac{2\times20}{3\times20}=\frac{40}{60}\)

\(\frac{1}{4}=\frac{1\times15}{3\times12}=\frac{15}{60}\)

\(\frac{3}{5}=\frac{3\times12}{5\times12}=\frac{36}{60}\)

b)

\(\frac{1}{6}=\frac{1\times55}{6\times55}=\frac{55}{330}\)

\(\frac{2}{5}=\frac{2\times66}{5\times66}=\frac{132}{330}\)

\(\frac{3}{11}=\frac{3\times30}{11\times30}=\frac{90}{330}\)