Question

[VIP] Вычислить несложный пример

Answer 1

$0,1*sqrt{20}:sqrt{45}-2frac{17}{30}= \\ =frac{1}{10}*frac{sqrt{20}}{sqrt{45}}-2frac{17}{30}= \\ =frac{1}{10}*sqrt{frac{20}{45}}-2frac{17}{30}= \\ =frac{1}{10}*sqrt{frac{4}{9}}-2frac{17}{30}= \\ =frac{1}{10}*frac{2}{3}-2frac{17}{30}= \\ =frac{1}{15}-frac{77}{30}= \\ =frac{2}{30}-frac{77}{30}= \\ =-frac{75}{30}= \\ =-frac{5}{2}= \\ =-2frac{1}{2}=-2,5$