Ответ:

  1. √5·√80 = √400 = 20.
  2. √0,3·√120 = √36 = 6.
  3. √6·√8·√3 = √144 = 12.
  4. √3,5·√(32/63) = √(7/2·32/63) = √(16/9) = 4/3.
  5. √(6³·5)·√(5³·6³) = √(6⁶·5⁴) = 6³·5² = 5400.
  6. √(11·2³)·√(11·2⁵) = √(11²·2⁸) = 11·16 = 176.
  7. √294/√6 = √49 = 7.
  8. √7/√112 = √(7/112) = √(1/16) = 1/4.
  9. (√5·√10)/√2 = √25 = 5.
  10. (√14·√24)/√21 = √(336/21) = √16 = 4.

Ответ: 20; 6; 12; 4/3; 5400; 176; 7; 1/4; 5; 4.