387. Найдите значение выражения:
a) $$\sqrt{10} \cdot \sqrt{40} = \sqrt{10 \cdot 40} = \sqrt{400} = 20$$
б) $$\sqrt{12} \cdot \sqrt{3} = \sqrt{12 \cdot 3} = \sqrt{36} = 6$$
в) $$\sqrt{162} \cdot \sqrt{2} = \sqrt{162 \cdot 2} = \sqrt{324} = 18$$
г) $$\sqrt{\frac{2}{3}} \cdot \sqrt{\frac{3}{8}} = \sqrt{\frac{2}{3} \cdot \frac{3}{8}} = \sqrt{\frac{1}{4}} = \frac{1}{2}$$
д) $$\sqrt{110} \cdot \sqrt{4,4} = \sqrt{110 \cdot 4,4} = \sqrt{484} = 22$$
e) $$\sqrt{1\frac{4}{5}} \cdot \sqrt{0,2} = \sqrt{\frac{9}{5}} \cdot \sqrt{\frac{1}{5}} = \sqrt{\frac{9}{25}} = \frac{3}{5}$$
ж) $$\sqrt{\frac{999}{111}} = \sqrt{9} = 3$$
з) $$\sqrt{\frac{15}{735}} = \sqrt{\frac{1}{49}} = \frac{1}{7}$$
Ответ: a) 20; б) 6; в) 18; г) 1/2; д) 22; e) 3/5; ж) 3; з) 1/7