解
|1-根号2|+|根号2-根号3|+|2-根号3
=√2-1+√3-√2+2-√3
=2-1
=1
|根号3-2|+三次根号负8+（2-根号3）*根号3
=2-√3+(-2)+2√3-3
=√3-3