2) √8+√50= 3) √18+√200= 4) √300−√75= 5) √45+√500= 11) √8+√2+√32= 12) √48+√3−√27= 13) √20+√500+√5= 14) √24−√6−√54= 15) √160+√10−√90=

Номера 2–5 и 11–15:

\[ \begin{aligned} 2)\quad &\sqrt{8}+\sqrt{50}=2\sqrt{2}+5\sqrt{2}=7\sqrt{2},\\ 3)\quad &\sqrt{18}+\sqrt{200}=3\sqrt{2}+10\sqrt{2}=13\sqrt{2},\\ 4)\quad &\sqrt{300}-\sqrt{75}=10\sqrt{3}-5\sqrt{3}=5\sqrt{3},\\ 5)\quad &\sqrt{45}+\sqrt{500}=3\sqrt{5}+10\sqrt{5}=13\sqrt{5},\\ 11)\quad &\sqrt{8}+\sqrt{2}+\sqrt{32}=2\sqrt{2}+\sqrt{2}+4\sqrt{2}=7\sqrt{2},\\ 12)\quad &\sqrt{48}+\sqrt{3}-\sqrt{27}=4\sqrt{3}+\sqrt{3}-3\sqrt{3}=2\sqrt{3},\\ 13)\quad &\sqrt{20}+\sqrt{500}+\sqrt{5}=2\sqrt{5}+10\sqrt{5}+\sqrt{5}=13\sqrt{5},\\ 14)\quad &\sqrt{24}-\sqrt{6}-\sqrt{54}=2\sqrt{6}-\sqrt{6}-3\sqrt{6}=-2\sqrt{6},\\ 15)\quad &\sqrt{160}+\sqrt{10}-\sqrt{90}=4\sqrt{10}+\sqrt{10}-3\sqrt{10}=2\sqrt{10}. \end{aligned} \]