Ответ:

Перемножаем подкоренные числа и упрощаем корень: \(\sqrt m\cdot\sqrt n=\sqrt{mn}\).

×\(\sqrt1\)\(\sqrt2\)\(\sqrt3\)\(\sqrt4\)\(\sqrt5\)\(\sqrt6\)
\(\sqrt1\)1\(\sqrt2\)\(\sqrt3\)2\(\sqrt5\)\(\sqrt6\)
\(\sqrt2\)\(\sqrt2\)2\(\sqrt6\)\(2\sqrt2\)\(\sqrt{10}\)\(2\sqrt3\)
\(\sqrt3\)\(\sqrt3\)\(\sqrt6\)3\(2\sqrt3\)\(\sqrt{15}\)\(3\sqrt2\)
\(\sqrt4\)2\(2\sqrt2\)\(2\sqrt3\)4\(2\sqrt5\)\(2\sqrt6\)