Question

thay tỉ số sau đây bằng tỉ số giữa các số nguyên 

a) \(\dfrac{10}{16}\) : \(\dfrac{4}{21}\) 

b) 1,3 : 2,75

c) \(\dfrac{-2}{5}\) : 0,25

Answer 1

`a)10/16 : 4/21`

`=105/32`

`=105:32`

`b)1,3:2,75`

`=26/55`

`=26:55`

`c)[-2]/5:0,25`

`=[-8]/5`

`=-8:5`

Answer 2

`a,` \(\dfrac{10}{16}\div\dfrac{4}{21}=\dfrac{5}{8}\div\dfrac{4}{21}=\dfrac{105}{32}=105\div32\)

`b,` \(1,3\div2,75=\dfrac{13}{10}\div\dfrac{11}{4}=\dfrac{26}{55}=26\div55\)

`c,` \(-\dfrac{2}{5}\div0,25=-\dfrac{2}{5}\div\dfrac{1}{4}=-\dfrac{8}{5}=-8\div5\)