Question

Quy đồng mẫu số các phân số sau :
a) 1/3 ; 1/4 và 1/24

b) 5/12; 7/6 và 5/24

Answer 1

a: \(MSC:24\\ \dfrac{1}{3}=\dfrac{1\times8}{3\times8}=\dfrac{8}{24};\dfrac{1}{4}=\dfrac{1\times6}{4\times6}=\dfrac{6}{24}\)

b: \(MSC:24\\ \dfrac{5}{12}=\dfrac{5\times2}{12\times2}=\dfrac{10}{24};\dfrac{7}{6}=\dfrac{7\times4}{6\times4}=\dfrac{28}{24}\)

Answer 2

Đây nè:

Answer 3

\(a,\dfrac{1}{3};\dfrac{1}{4}và\dfrac{1}{24}\)

\(\dfrac{1}{3}=\dfrac{1\times8}{3\times8}=\dfrac{8}{24};\dfrac{1}{4}=\dfrac{1\times6}{4\times6}=\dfrac{6}{24};\dfrac{1}{24}\)

\(b,\dfrac{5}{12};\dfrac{7}{6}và\dfrac{5}{24}\)

\(\dfrac{5}{12}=\dfrac{5\times2}{12\times2}=\dfrac{10}{24};\dfrac{7}{6}=\dfrac{7\times4}{6\times4}=\dfrac{28}{24};\dfrac{5}{24}\)

Answer 4

a)\(\dfrac{1}{3}=\dfrac{1.8}{3.8}=\dfrac{8}{24}\)

\(\dfrac{1}{4}=\dfrac{1.6}{4.6}=\dfrac{6}{24}\)

cái kia không cần nữa

b)\(\dfrac{5}{12}=\dfrac{5.2}{12.2}=\dfrac{10}{24}\)

\(\dfrac{7}{6}=\dfrac{7.4}{6.4}=\dfrac{28}{24}\)

cái kia không cần nữa

P/s:dấu chấm là dấu nhân

Answer 5

a) MSC : 24

\(\dfrac{1}{3}=\dfrac{1\times8}{3\times8}=\dfrac{8}{24}\)

\(\dfrac{1}{4}=\dfrac{1\times6}{4\times6}=\dfrac{6}{24}\)

\(\dfrac{1}{24}\)

b) MSC : 24

\(\dfrac{5}{12}=\dfrac{5\times2}{12\times2}=\dfrac{10}{24}\)

\(\dfrac{7}{6}=\dfrac{7\times4}{6\times4}=\dfrac{28}{24}\)

\(\dfrac{5}{24}\)

Answer 6

Câu a: \(\dfrac{6}{24}\) 

Câu b: \(\dfrac{28}{24}\)