Решение:

1)

a) $$√16 = 4$$

б) $$√100 = 10$$

в) $$√49 = 7$$

г) $$√81 = 9$$

2)

a) $$√3600 = 60$$

б) $$√400 = 20$$

в) $$√490 000 = 700$$

г) $$√4 000 000 = 2000$$

3)

a) $$√0,09 = 0,3$$

б) $$√0,25 = 0,5$$

в) $$√0,0081 = 0,09$$

г) $$√0,0009 = 0,03$$

4)

a) $$√{\frac{1}{64}} = \frac{1}{8}$$

б) $$√{5\frac{4}{9}} = √{\frac{49}{9}} = \frac{7}{3} = 2\frac{1}{3}$$

в) $$√{3\frac{6}{25}} = √{\frac{81}{25}} = \frac{9}{5} = 1\frac{4}{5}$$

г) $$√{1\frac{9}{16}} = √{\frac{25}{16}} = \frac{5}{4} = 1\frac{1}{4}$$