Question

tìm phân số a/b

Answer 1

\(\dfrac{3}{4}\times\dfrac{a}{b}=\dfrac{1}{2}\)

\(\dfrac{a}{b}=\dfrac{1}{2}:\dfrac{3}{4}\)

\(\dfrac{a}{b}=\dfrac{2}{3}\)

Vậy a = 2 và b = 3

Answer 2

`3/4xx a/b=1/2`

`a/b=1/2:3/4`

`a/b=1/2xx4/3`

`a/b=2/3`

Answer 3

\(\dfrac{3}{4}\times\dfrac{a}{b}=\dfrac{1}{2}\)
\(\dfrac{a}{b}=\dfrac{1}{2}:\dfrac{3}{4}\)
\(\dfrac{a}{b}=\dfrac{1\times4}{2\times3}\)
\(\dfrac{a}{b}=\dfrac{1\times2\times2}{2\times3}\)
\(\dfrac{a}{b}=\dfrac{2}{3}\)

Answer 4

3/4xa/b=1/2

a/b=1/2:3/4

a/b=1/2x4/3

a/b=4/6➝2/3