Question

Bài 1. Rút gọn các phân số:

28/14 ; 36/28 ; 88/77 ; 45/50 ; 120/150         

Answer 1

28/14=2

36/28=9/7

88/77=8/7

45/50=9/10

120/150=4/5

Answer 2

\(\dfrac{28}{14}=2\)
\(\dfrac{36}{28}=\dfrac{36:4}{28:4}=\dfrac{9}{7}\)
\(\dfrac{88}{77}=\dfrac{88:11}{77:11}=\dfrac{8}{7}\)
\(\dfrac{45}{50}=\dfrac{45:5}{50:5}=\dfrac{9}{10}\)
\(\dfrac{120}{150}=\dfrac{120:30}{150:30}=\dfrac{4}{5}\)