Question

Tính bằng cách thuận tiện nhât:

7/5 x 11/24 x 5/7 x 24/55

Answer 1

\(\dfrac{7}{5}\times\dfrac{11}{24}\times\dfrac{5}{7}\times\dfrac{24}{55}\\ =\left(\dfrac{7}{5}\times\dfrac{5}{7}\right)\times\left(\dfrac{11}{24}\times\dfrac{24}{55}\right)\\ =1\times\dfrac{1}{5}\\ =\dfrac{1}{5}\)

Answer 2

\(\dfrac{7x11x5x24}{5x24x7x55}\)=\(\dfrac{11}{55}\)=\(\dfrac{1}{5}\)

Answer 3

= (7/5 x 5/7) x (11/24 x 24/55)

= 1 x 1/5

= 1/5