A1. Вычислите:

• a) $$ \sqrt{169} \times \sqrt{9} = 13 \times 3 = 39 $$
• б) $$ \sqrt{289} \times 25 = 17 \times 5 = 85 $$
• в) $$ \sqrt{361} \times 16 \times 49 = 19 \times 4 \times 7 = 532 $$
• г) $$ \sqrt{\frac{81 \times 36}{625}} = \sqrt{\frac{81}{625}} \times \sqrt{36} = \frac{9}{25} \times 6 = \frac{54}{25} = 2,16 $$
• д) $$ \sqrt{\frac{324}{25}} \times \sqrt{\frac{225}{144}} = \frac{18}{5} \times \frac{15}{12} = \frac{18}{5} \times \frac{5}{4} = \frac{18}{4} = 4,5 $$
• е) $$ \sqrt{(24,6)^2} = 24,6 $$
• ж) $$ 0,5 \sqrt{(-4)^2} = 0,5 \times 4 = 2 $$