A1. Вычислите:

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