1) √2×2√2= 2√2×2=2×2=4
2) √27/√3 = √27÷3=√9=3
3)√128/√2=√128÷2=√64=8
4)3√4/9=3×2/3=2
5)√20×√5=√20×5=√100=10
6)√10×√3,6=√10×3,6=√36=6
7)5/14√28×√63=5/14×√28×63=5/14×√1764=5/14×42=15
8)√7×18×√42=√7×18×42=√5292=42√3
9)√42×119/√17×6=√4998/√102=√49=7
10)(√20-√5)×√5=√15×√5=√75=√20-5