Вычислить: 1) √49; 3) √0,09; 5) √(4/16); 7) √64 - √81; 9) (√4)² – 1,5; 2) √121; 4) √400; 6) √(3 6/25); 8) √64 – 6 × √0,25; 10) √(4 × 5² – 6²);

1. $$ sqrt{49} = 7 $$
2. $$ \sqrt{121} = 11 $$
3. $$ \sqrt{0.09} = 0.3 $$
4. $$ \sqrt{400} = 20 $$
5. $$ \sqrt{\frac{4}{16}} = \sqrt{\frac{1}{4}} = \frac{1}{2} = 0.5 $$
6. $$ \sqrt{3\frac{6}{25}} = \sqrt{\frac{3 \times 25 + 6}{25}} = \sqrt{\frac{75+6}{25}} = \sqrt{\frac{81}{25}} = \frac{9}{5} = 1.8 $$
7. $$ \sqrt{64} - \sqrt{81} = 8 - 9 = -1 $$
8. $$ \sqrt{64} - 6 \times \sqrt{0.25} = 8 - 6 \times 0.5 = 8 - 3 = 5 $$
9. $$ (\sqrt{4})^2 - 1.5 = 4 - 1.5 = 2.5 $$
10. $$ \sqrt{4 \times 5^2 - 6^2} = \sqrt{4 \times 25 - 36} = \sqrt{100 - 36} = \sqrt{64} = 8 $$

Ответ:

1. 7
2. 11
3. 0.3
4. 20
5. 0.5
6. 1.8
7. -1
8. 5
9. 2.5
10. 8