a) \(\sqrt {81} = 9\)
b) \(\sqrt {8100} = 90\)
c) \(\sqrt {64} = 8\)
d) \(\sqrt {0,64} = 0,8\)
e) \({\rm{}}\sqrt {1000000} = 1000\)
g) \(\sqrt {0,01} = 0,1\)
h) \(\displaystyle \sqrt {{{49} \over {100}}} = {7 \over {10}}\)
i) \(\displaystyle \sqrt {{4 \over {25}}} = {2 \over 5}\)
k) \(\displaystyle \sqrt {{{0,09} \over {121}}} = {{0,3} \over {11}} = {3 \over {110}}\)