Question

Quy đồng mẫu số

Answer 1

\(a)8/12; 3/12\)

\(b)63/72; 64/72\)

\(c)32/48; 42/48\) nhé

Answer 2

\(a.\dfrac{2}{3}=\dfrac{4}{12};\dfrac{1}{4}=\dfrac{3}{12}\\ b.\dfrac{7}{8}=\dfrac{63}{72};\dfrac{8}{9}=\dfrac{64}{72}\\ c.\dfrac{4}{6}=\dfrac{32}{48};\dfrac{7}{8}=\dfrac{42}{48}\)

Answer 3

\(a,\dfrac{2}{3}và\dfrac{1}{4}=\dfrac{2.4}{3.4}=\dfrac{8}{12};\dfrac{1}{4}=\dfrac{1.3}{4.3}=\dfrac{3}{12}\)

\(b,\dfrac{7}{8}và\dfrac{8}{9}=\dfrac{7}{8}=\dfrac{7.9}{8.9}=\dfrac{63}{72};\dfrac{8}{9}=\dfrac{8.8}{9.8}=\dfrac{64}{72}\)

\(c,\dfrac{4}{6}và\dfrac{7}{8}=\dfrac{4}{6}=\dfrac{4.4}{6.4}=\dfrac{16}{24};\dfrac{7}{8}=\dfrac{7.3}{8.3}=\dfrac{21}{24}\)

Answer 4

\(a,\dfrac{2\times4}{3\times4}=\dfrac{8}{12};\dfrac{1\times3}{4\times3}=\dfrac{3}{12}\\ b,\dfrac{7\times9}{8\times9}=\dfrac{63}{72};\dfrac{8\times8}{9\times8}=\dfrac{64}{72}\\ c,\dfrac{4\times8}{6\times8}=\dfrac{32}{48};\dfrac{7\times6}{8\times6}=\dfrac{42}{48}\)

Answer 5

$a)\dfrac{2}{3}$ và $\dfrac{1}{4}$

$\dfrac{2}{3}=\dfrac{2\times4}{12}=\dfrac{8}{12}$