Question

quy đồng  

1/2 ,1/5 và 1/3

Answer 1

Mẫu số chung : \(30\)

\(\dfrac{1}{2}=\dfrac{1\times15}{2\times15}=\dfrac{15}{30}\\ \dfrac{1}{5}=\dfrac{1\times6}{5\times6}=\dfrac{6}{30}\\ \dfrac{1}{3}=\dfrac{1\times10}{3\times10}=\dfrac{10}{30}\)

Answer 2

1/2=15/30

1/5=6/30

1/3=10/30

Answer 3

\(\dfrac{1}{2}=\dfrac{1}{5}=\dfrac{1}{3}=\dfrac{15}{30}=\dfrac{6}{30}=\dfrac{10}{30}\)

Answer 4

Ta có : `1/2 = (1 xx 3 xx 5)/(2 xx 3 xx 5)= 15/30`

`1/3 = (1 xx 2 xx 5)/(3 xx 2 xx 5) = 10/30`

`2/5 = (2 xx 2 xx 3)/(5 xx 2 xx 3) = 12/30.`

Answer 5

\(\dfrac{1}{2},\dfrac{1}{5},\dfrac{1}{3}\)

=\(\dfrac{15}{30},\dfrac{6}{30},\dfrac{10}{30}\)