Вычислите: 1 − 3/4; 7 − 1 7/8; 3 7/9 − 4/15; 3 4/9 − 1 5/6; 10 1/2 − 4 9/14.

1. \(1-\frac{3}{4}=\frac{4}{4}-\frac{3}{4}=\frac{1}{4}\).
2. \(7-1\frac{7}{8}=6\frac{8}{8}-1\frac{7}{8}=5\frac{1}{8}\).
3. \(3\frac{7}{9}-\frac{4}{15}=3+\frac{35}{45}-\frac{12}{45}=3\frac{23}{45}\).
4. \(3\frac{4}{9}-1\frac{5}{6}=3\frac{8}{18}-1\frac{15}{18}=2\frac{11}{18}\).
5. \(10\frac{1}{2}-4\frac{9}{14}=10\frac{7}{14}-4\frac{9}{14}=9\frac{21}{14}-4\frac{9}{14}=5\frac{12}{14}=5\frac{6}{7}\).

Ответ: 1/4; 5 1/8; 3 23/45; 2 11/18; 5 6/7.