蘑菇的话语，你好！√（4/27）=√[（2/3）^2×1/3]=2/3√(1/3)=2/3√(3/9)=4/9√3≈4/9×1.732≈0.77
2/根号27＝2倍根号27/27
27分之2倍根号27
10/4
