Question

Quy đồng mẫu số hai phân số

a, 5/6 và 17/18

b,3/8 và 7/12

Answer 1

a)

MSC: 18

Có:

\(\dfrac{5}{6}=\dfrac{5\times3}{6\times3}=\dfrac{15}{18}\)

b)

MSC: 24

Có:

\(\dfrac{3}{8}=\dfrac{3\times3}{8\times3}=\dfrac{9}{24}\)

\(\dfrac{7}{12}=\dfrac{7\times2}{12\times2}=\dfrac{14}{24}\)

Answer 2

a: \(\dfrac{5}{6}=\dfrac{5\cdot3}{6\cdot3}=\dfrac{15}{18}\)

17/18=17/18

b: \(\dfrac{3}{8}=\dfrac{3\cdot3}{8\cdot3}=\dfrac{9}{24}\)

\(\dfrac{7}{12}=\dfrac{7\cdot2}{12\cdot2}=\dfrac{14}{24}\)

Answer 3

a) \(\dfrac{5}{6}=\dfrac{5\times3}{6\times3}=\dfrac{15}{18}\)          ;           \(\dfrac{17}{18}\) giữ nguyên phân số

b) \(\dfrac{3}{8}=\dfrac{3\times3}{8\times3}=\dfrac{9}{24}\)          ;            \(\dfrac{7}{12}=\dfrac{7\times2}{12\times2}=\dfrac{14}{24}\)

\(#Wendy.Dang\)