\(\sqrt{1}=1\)

\(\sqrt{16}=4\)

\(\sqrt{81}=9\)

\(\sqrt{64}-\sqrt{49}=8-7=1\)

\(5\sqrt{121}+12\sqrt{81}=5⋅11+12⋅9=163\)

\(\sqrt{81}⋅\sqrt{36}=9⋅6=54\)

\(\sqrt{6^2+108}=\sqrt{36+108}=\sqrt{144}=12\)

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

\(\sqrt{-81}\) kan niet.

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

\(\sqrt{(-8)^2}=\sqrt{64}=8\)

\(4⋅\sqrt{9}=4⋅3=12\)

\({5\sqrt{3} \over 3}=1\frac{2}{3}\sqrt{3}\text{.}\)

\(8\sqrt{3}+6\sqrt{3}=14\sqrt{3}\)

\(10\sqrt{7}-6\sqrt{3}\) kan niet korter.

\(5\sqrt{20}⋅2\sqrt{5}=10⋅\sqrt{100}=10⋅10=100\)

\(6\sqrt{2}⋅2\sqrt{23}=12\sqrt{46}\)

\({\sqrt{30} \over \sqrt{6}}=\sqrt{5}\)

\({5\sqrt{100} \over \sqrt{10}}=5⋅{\sqrt{100} \over \sqrt{10}}=5\sqrt{10}\)

\({12\sqrt{45} \over 6\sqrt{5}}={12 \over 6}⋅{\sqrt{45} \over \sqrt{5}}=2⋅\sqrt{9}=2⋅3=6\)

\((-6\sqrt{2})^2=(-6)^2⋅\sqrt{2}^2=36⋅2=72\text{.}\)

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

\(-3(\sqrt{10})^2=-3⋅10=-30\text{.}\)

\((2\sqrt{5})^2-7(\sqrt{8})^2=2^2⋅(\sqrt{5})^2-7⋅(\sqrt{8})^2=4⋅5-7⋅8=-36\text{.}\)