解:
(1)√⅓ (2)√½+√27-√18 (3) √6÷(√3-√2)
=√3/3 =√2/2+3√3-3√2 = √6(√3+√2)/[(√3+√2)(√3-√2)]
≈1.732/3 ≈1.414/2+3*1.732-3*1.414 =(√18+√12)/(3-2)
≈0.58 =1.661 =3√2+2√3
≈1.66 ≈3*1.414+2*1.732
=7.706
≈7.71
精确到0.01,楼上对全是错误答案
(1)√⅓=√3/3≈1.732/3≈0.577
(2)√½+√27-√18 ≈ 1.414/2+3*1.732-3*1.414 ≈1.661
(3)√6÷(√3-√2)≈√3*√2÷(√3-√2)≈7.706
√6÷(√3-√2)=√6(√3+√2)=3√2+2√3≈7.706