Đáp án:
$\dfrac{60}{72}=\dfrac56, \dfrac{70}{95}=\dfrac{14}{19}, \dfrac{150}{360}=\dfrac{5}{12}$
Giải thích các bước giải:
Ta có: $60=2^2.3.5, 72=2^3.3^2$
$\to UCLN(60, 72)=2^2.3=12$
$\to \dfrac{60}{72}=\dfrac{60:12}{72:12}=\dfrac56$
Ta có: $70=2.5.7, 95=5.19$
$\to UCLN(70,95)=5$
$\to \dfrac{70}{95}=\dfrac{70:5}{95:5}=\dfrac{14}{19}$
Ta có:
$150=2.3.5^2, 360=2^3.3^2.5$
$\to UCLN(150, 360)=2.3.5=30$
$\to \dfrac{150}{360}=\dfrac{150:30}{360:30}=\dfrac{5}{12}$
