Ответ:
- \(3\frac{1}{12}-\frac{3}{4}=3\frac{1}{12}-\frac{9}{12}=2\frac{4}{12}=2\frac{1}{3}\).
- \(5\frac{2}{5}-1\frac{11}{15}=5\frac{6}{15}-1\frac{11}{15}=4\frac{21}{15}-1\frac{11}{15}=3\frac{10}{15}=3\frac{2}{3}\).
- Приведём дроби к знаменателю 56: \(8\frac{5}{7}-1\frac{7}{8}=8\frac{40}{56}-1\frac{49}{56}=7\frac{96}{56}-1\frac{49}{56}=6\frac{47}{56}\).
- Приведём дроби к знаменателю 48: \(11\frac{9}{16}-4\frac{23}{24}=11\frac{27}{48}-4\frac{46}{48}=10\frac{75}{48}-4\frac{46}{48}=6\frac{29}{48}\).
Ответ: а) \(2\frac{1}{3}\); б) \(3\frac{2}{3}\); в) \(6\frac{47}{56}\); г) \(6\frac{29}{48}\).
