Question

Bài 3 : Rút gọn các phân số .

18/30

48/96

64/720

42/98 

Answer 1

\(\dfrac{18}{30}=\dfrac{3}{5};\dfrac{48}{96}=\dfrac{1}{2};\dfrac{64}{720}=\dfrac{4}{45};\dfrac{42}{98}=\dfrac{3}{7}\)

Answer 2

\(\dfrac{18}{30}=\dfrac{9}{15}\)

\(\dfrac{48}{96}=\dfrac{1}{2}\)

\(\dfrac{64}{720}=\dfrac{8}{15}\)

\(\dfrac{42}{98}=\dfrac{3}{7}\)

Answer 3

\(\dfrac{18}{30}=\dfrac{18:6}{30:6}=\dfrac{3}{5}\\ \dfrac{48}{96}=\dfrac{48:48}{96:48}=\dfrac{1}{2}\\ \dfrac{64}{720}=\dfrac{64:16}{720:16}=\dfrac{4}{45}\\ \dfrac{42}{98}=\dfrac{42:14}{98:14}=\dfrac{3}{7}\)

Answer 4

18/30 = 3/5 ; 48/96 = 1/2; 64/720 = 4/45; 42/98 = 3/7