\(\dfrac{3}{5}=\dfrac{3x2}{5x2}=\dfrac{6}{10};\dfrac{7}{10}=\dfrac{7}{10}\)
Mẫu số chung: 10
\(\dfrac{7}{10}=\dfrac{7}{10}\)
\(\dfrac{3}{5}=\dfrac{6}{10}\)
Mẫu số chung là 10 nên:
\(\dfrac{7}{10}\) giữ nguyên
\(\dfrac{3}{5}=\dfrac{3x2}{5x2}=\dfrac{6}{10}\)