\(\sqrt{1}=1\)

\(\sqrt{25}=5\)

\(\sqrt{81}=9\)

\(\sqrt{64}+\sqrt{25}=8+5=13\)

\(8\sqrt{16}+10\sqrt{49}=8⋅4+10⋅7=102\)

\(\sqrt{9}⋅\sqrt{49}=3⋅7=21\)

\((4\sqrt{2})^2=4^2⋅\sqrt{2}^2=16⋅2=32\text{.}\)

\({9\sqrt{5} \over 2}=4\frac{1}{2}\sqrt{5}\text{.}\)

\(9\sqrt{11}-6\sqrt{11}=3\sqrt{11}\)

\(9\sqrt{3}-8\sqrt{7}\) kan niet korter.

\(4\sqrt{2}⋅3\sqrt{8}=12⋅\sqrt{16}=12⋅4=48\)

\(2\sqrt{17}⋅5\sqrt{2}=10\sqrt{34}\)

\({\sqrt{10} \over \sqrt{2}}=\sqrt{5}\)

\({42\sqrt{42} \over 7\sqrt{6}}={42 \over 7}⋅{\sqrt{42} \over \sqrt{6}}=6\sqrt{7}\)

\({6\sqrt{24} \over 2\sqrt{6}}={6 \over 2}⋅{\sqrt{24} \over \sqrt{6}}=3⋅\sqrt{4}=3⋅2=6\)

\(-\sqrt{16}=-4\)

\(\sqrt{10^2}=10\)

\(\sqrt{(-5)^2}=\sqrt{25}=5\)

\((\sqrt{5})^2=5\text{.}\)

\(8(\sqrt{10})^2=8⋅10=80\text{.}\)

\((-5\sqrt{3})^2-9(\sqrt{2})^2=(-5)^2⋅(\sqrt{3})^2-9⋅(\sqrt{2})^2=25⋅3-9⋅2=57\text{.}\)