Question

2\(\dfrac{2}{3}\) x 5\(\dfrac{1}{4}\)                      3\(\dfrac{1}{2}\) : 2\(\dfrac{1}{4}\)

chắc khum ai on h này đâu

Answer 1

a: \(=\dfrac{8}{3}\cdot\dfrac{21}{4}=\dfrac{21}{3}\cdot\dfrac{8}{4}=7\cdot2=14\)

b: \(=\dfrac{7}{2}:\dfrac{9}{4}=\dfrac{7}{2}\cdot\dfrac{4}{9}=\dfrac{28}{18}=\dfrac{14}{9}\)

Answer 2

`2 2/3 xx 5 1/4 = 8/3 xx 21/4 = (8xx21)/(3xx4)= 168/12=14`

`3 1/2 : 2 1/4 = 7/2 : 9/4 = 7/2 xx 4/9 = (7xx4)/(2xx9) = 28/18=14/9`