Ответ:

Вариант В1

  1. \(\sqrt{16}\cdot\sqrt{225}-3\sqrt{81}=4\cdot15-3\cdot9=60-27=33\).

  2. \(1\frac{4}{7}\cdot\sqrt{4900}=\frac{11}{7}\cdot70=110\).

  3. \(\frac{6}{7}\cdot\sqrt{1\frac{13}{36}}=\frac{6}{7}\cdot\sqrt{\frac{49}{36}}=\frac{6}{7}\cdot\frac{7}{6}=1\).

  4. \(\sqrt{\sqrt{0.64}+\sqrt{0.0001}}=\sqrt{0.8+0.01}=\sqrt{0.81}=0.9\).

Вариант В2

  1. \(\sqrt{9}\cdot\sqrt{196}-4\sqrt{64}=3\cdot14-4\cdot8=42-32=10\).

  2. \(1\frac{2}{5}\cdot\sqrt{2500}=\frac{7}{5}\cdot50=70\).

  3. \(\frac{7}{8}\cdot\sqrt{1\frac{15}{49}}=\frac{7}{8}\cdot\sqrt{\frac{64}{49}}=\frac{7}{8}\cdot\frac{8}{7}=1\).

  4. \(\sqrt{\sqrt{0.81}-\sqrt{0.0081}}=\sqrt{0.9-0.09}=\sqrt{0.81}=0.9\).