\(A.\dfrac{5}{10}và\dfrac{25}{75}\)
\(\dfrac{5}{10}=\dfrac{1}{2};\dfrac{25}{75}=\dfrac{1}{3}\)
\(\dfrac{1}{2}=\dfrac{3}{6};\dfrac{1}{3}=\dfrac{2}{6}\)
\(B.\dfrac{2}{4};\dfrac{5}{15}và\dfrac{7}{28}\)
\(\dfrac{2}{4}=\dfrac{1}{2};\dfrac{5}{15}=\dfrac{1}{3};\dfrac{7}{28}=\dfrac{1}{4}\)
\(\dfrac{1}{2}=\dfrac{6}{12};\dfrac{1}{3}=\dfrac{4}{12};\dfrac{1}{4}=\dfrac{3}{12}\)
\(C.\dfrac{3}{4};\dfrac{6}{16}và\dfrac{10}{20}\)
\(\dfrac{3}{4}=\dfrac{3}{4};\dfrac{6}{16}=\dfrac{3}{8};\dfrac{10}{20}=\dfrac{1}{2}\)
\(\dfrac{3}{4}=\dfrac{6}{8};\dfrac{3}{8}=\dfrac{3}{8};\dfrac{1}{2}=\dfrac{4}{8}\)
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