Question

Answer 1

8/7 x 8/3 = 64/21

15/9 - 10/27 + 1/6= 79/54

7/15 + 1/3 = 4/5

nếu sai cho xin lỗi do đề hơi mờ

Answer 2

\(\dfrac{4\text{×}2}{7\text{×}7}=\dfrac{8}{49}:\dfrac{3}{8}=\dfrac{8\text{×}8}{49\text{×}3}=\dfrac{64}{147}\)

\(\left(\dfrac{15-4}{9}\right)\text{×}\left(\dfrac{5+1}{6}\right)=\dfrac{11\text{×}6}{9\text{×}1}=\dfrac{66}{9}\)

chụp lại nhé mờ quá:")