Đáp án:
`(\sqrt{1/3}-\sqrt{4/3}+\sqrt{3}):\sqrt{3}`
`=((1)/(\sqrt{3})-(2)/(\sqrt{3})+\sqrt{3}):\sqrt{3}`
`=((1)/(\sqrt{3})-(2)/(\sqrt{3})+(3)/(\sqrt{3})):\sqrt{3}`
`=(1-2+3)/(\sqrt{3}):\sqrt{3}`
`=(2)/(\sqrt{3}):\sqrt{3}`
`=(2)/(\sqrt{3}).(1)/(\sqrt{3})`
`=(2)/(3)`