Ответ:

  1. а) \(\frac{3}{4}-\frac{3}{16}=\frac{9}{16}\).
    б) \(\frac{8}{9}+1\frac{5}{6}=\frac{16}{18}+\frac{33}{18}=\frac{49}{18}=2\frac{13}{18}\).
    в) \(2\frac{11}{36}-1\frac{23}{24}=\frac{167}{72}-\frac{141}{72}=\frac{13}{36}\).
    г) \(7\frac{1}{2}-2\frac{2}{3}=\frac{45}{6}-\frac{16}{6}=4\frac{5}{6}\).
    д) \(6\frac{4}{25}:15\frac{2}{5}=\frac{154}{25}:\frac{77}{5}=\frac{2}{5}\).
  2. а) Сначала выполняем умножение: \(3\frac{1}{3}-1\frac{1}{4}\cdot\frac{16}{25}=\frac{10}{3}-\frac{5}{4}\cdot\frac{16}{25}=\frac{10}{3}-\frac{4}{5}=2\frac{8}{15}\).
    б) \(1\frac{1}{10}+7:(3\frac{1}{12}-1\frac{5}{8})=\frac{11}{10}+7:\frac{35}{24}=\frac{11}{10}+\frac{24}{5}=5\frac{9}{10}\).