trong các phân số 18/24 15/35 52/76 350/280 75/100 45/36 1313/1919 những phân số nào bằng nhanh

$\dfrac{18}{24}$ = $\dfrac{18 ÷ 6}{24 ÷ 6}$ = $\dfrac{3}{4}$

$\dfrac{15}{35}$ = $\dfrac{15 ÷ 5}{35 ÷ 5}$ = $\dfrac{3}{7}$

$\dfrac{52}{76}$ = $\dfrac{52 ÷ 4}{76 ÷ 4}$ = $\dfrac{13}{19}$

$\dfrac{350}{280}$ = $\dfrac{350 ÷ 70}{280 ÷ 70}$ = $\dfrac{5}{4}$

$\dfrac{75}{100}$ = $\dfrac{75 ÷ 25}{100 ÷ 25}$ = $\dfrac{3}{4}$

$\dfrac{45}{36}$ = $\dfrac{45 ÷ 9}{36 ÷ 9}$ = $\dfrac{5}{4}$

$\dfrac{1313}{1919}$ = $\dfrac{1313 ÷ 101}{1919 ÷ 101}$ = $\dfrac{13}{19}$

⇒ $\dfrac{18}{24}$ = $\dfrac{75}{100}$

⇒ $\dfrac{52}{76}$ = $\dfrac{1313}{1919}$

⇒ $\dfrac{350}{280}$ = $\dfrac{45}{36}$