\(\sqrt{1}=1\)

\(\sqrt{16}=4\)

\(\sqrt{225}=15\)

\(\sqrt{9}+\sqrt{36}=3+6=9\)

\(2\sqrt{49}+11\sqrt{9}=2⋅7+11⋅3=47\)

\(\sqrt{81}⋅\sqrt{36}=9⋅6=54\)

\(\sqrt{7^2+51}=\sqrt{49+51}=\sqrt{100}=10\)

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

\(\sqrt{-16}\) kan niet.

\(\sqrt{11^2}=11\)

\(\sqrt{(-12)^2}=\sqrt{144}=12\)

\(7⋅\sqrt{64}=7⋅8=56\)

\({5\sqrt{3} \over 7}=\frac{5}{7}\sqrt{3}\text{.}\)

\(10\sqrt{3}-3\sqrt{3}=7\sqrt{3}\)

\(6\sqrt{5}+10\sqrt{7}\) kan niet korter.

\(3\sqrt{2}⋅2\sqrt{2}=6⋅\sqrt{4}=6⋅2=12\)

\(2\sqrt{17}⋅3\sqrt{2}=6\sqrt{34}\)

\({\sqrt{20} \over \sqrt{10}}=\sqrt{2}\)

\({40\sqrt{30} \over 8\sqrt{5}}={40 \over 8}⋅{\sqrt{30} \over \sqrt{5}}=5\sqrt{6}\)

\({56\sqrt{12} \over 8\sqrt{3}}={56 \over 8}⋅{\sqrt{12} \over \sqrt{3}}=7⋅\sqrt{4}=7⋅2=14\)

\((-9\sqrt{5})^2=(-9)^2⋅\sqrt{5}^2=81⋅5=405\text{.}\)

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

\(-8(\sqrt{10})^2=-8⋅10=-80\text{.}\)

\((-3\sqrt{7})^2-8(\sqrt{2})^2=(-3)^2⋅(\sqrt{7})^2-8⋅(\sqrt{2})^2=9⋅7-8⋅2=47\text{.}\)