\(a:\dfrac{1}{6}=\dfrac{1}{3}-\dfrac{1}{5}\\ a:\dfrac{1}{6}=\dfrac{2}{15}\\ a=\dfrac{1}{45}\)
`a:(1)/(6)=(1)/(3)-(1)/(5)=(1xx5-1xx3)/(15)=(2)/(15)`
`a=(2)/(15)xx(1)/(6)=(2)/(15xx2xx3)=(1)/(15xx3)=(1)/(45)`
a:1/6=1/3-1/5
<=>a:1/6=2/15
<=>a=2/15x1/6
<=>a=1/45
\(a:\dfrac{1}{6}=\dfrac{1}{3}-\dfrac{1}{5}\)
\(a:\dfrac{1}{6}=\dfrac{2}{15}\)
\(a=\dfrac{2}{15}\cdot\dfrac{1}{6}=\dfrac{1}{45}\)
a:\(\dfrac{1}{6}=\dfrac{2}{15}\)
a=\(\dfrac{2}{15}x\dfrac{1}{6}\)
a=\(\dfrac{1}{45}\)

4 và 5