Ответ:
- Одинаковые знаменатели: \(\frac{7}{18}+\frac{5}{18}=\frac{12}{18}=\frac{2}{3}\).
- \(\frac{29}{64}-\frac{14}{64}-\frac{9}{64}=\frac{29-14-9}{64}=\frac{6}{64}=\frac{3}{32}\).
- Приведём к знаменателю 28: \(\frac{3}{28}+\frac{5}{14}=\frac{3}{28}+\frac{10}{28}=\frac{13}{28}\).
- \(\frac{9}{11}-\frac{2}{5}=\frac{45}{55}-\frac{22}{55}=\frac{23}{55}\).
- Общий знаменатель 48: \(\frac{9}{16}+\frac{7}{24}-\frac{3}{8}=\frac{27}{48}+\frac{14}{48}-\frac{18}{48}=\frac{23}{48}\).
- \(1\frac{1}{7}+2\frac{1}{3}=3+\frac{3}{21}+\frac{7}{21}=3\frac{10}{21}\).
- \(7-3\frac{9}{16}=6\frac{16}{16}-3\frac{9}{16}=3\frac{7}{16}\).
- \(4\frac{7}{33}-2\frac{3}{22}=2+\frac{14}{66}-\frac{9}{66}=2\frac{5}{66}\).
- \(6\frac{1}{6}-2\frac{2}{3}=6\frac{1}{6}-2\frac{4}{6}=3\frac{3}{6}=3\frac{1}{2}\).
