46. Найдите значение выражения и запишите ответ: 1) 2 5/21 + 6/7; 2) 1 5/9 − 8/9; 3) 1 2/7 + 6/7; 4) 1 3/5 − 14/15; 5) 1 1/12 − 5/24; 6) 8 3/7 + 2 2/3; 7) 4 1/18 − 1 5/9; 8) 3 1/2 − 2/3; 9) 5 2/7 − 1 3/5; 10) 10 2/3 − 5/6; 11) 6 1/4 + 3 2/5; 12) 3 1/6 − 1 1/3; 13) 6 3/8 − 3 5/6; 14) 4 5/8 + 3 15/16.

1. \(2\frac{5}{21}+\frac{6}{7}=2\frac{23}{21}=3\frac{2}{21}\).
2. \(1\frac{5}{9}-\frac{8}{9}=\frac{14}{9}-\frac{8}{9}=\frac{2}{3}\).
3. \(1\frac{2}{7}+\frac{6}{7}=1\frac{8}{7}=2\frac{1}{7}\).
4. \(1\frac{3}{5}-\frac{14}{15}=1\frac{9}{15}-\frac{14}{15}=\frac{14}{15}\).
5. \(1\frac{1}{12}-\frac{5}{24}=1\frac{2}{24}-\frac{5}{24}=\frac{21}{24}=\frac{7}{8}\).
6. \(8\frac{3}{7}+2\frac{2}{3}=10+\frac{9}{21}+\frac{14}{21}=11\frac{2}{21}\).
7. \(4\frac{1}{18}-1\frac{5}{9}=3+\frac{1}{18}-\frac{10}{18}=2\frac{1}{2}\).
8. \(3\frac{1}{2}-\frac{2}{3}=3+\frac{3}{6}-\frac{4}{6}=2\frac{5}{6}\).
9. \(5\frac{2}{7}-1\frac{3}{5}=4+\frac{10}{35}-\frac{21}{35}=3\frac{4}{5}\).
10. \(10\frac{2}{3}-\frac{5}{6}=10+\frac{4}{6}-\frac{5}{6}=9\frac{5}{6}\).
11. \(6\frac{1}{4}+3\frac{2}{5}=9+\frac{5}{20}+\frac{8}{20}=9\frac{13}{20}\).
12. \(3\frac{1}{6}-1\frac{1}{3}=2+\frac{1}{6}-\frac{2}{6}=1\frac{5}{6}\).
13. \(6\frac{3}{8}-3\frac{5}{6}=3+\frac{9}{24}-\frac{20}{24}=2\frac{13}{24}\).
14. \(4\frac{5}{8}+3\frac{15}{16}=7+\frac{10}{16}+\frac{15}{16}=8\frac{9}{16}\).

Ответ: 1) \(3\frac{2}{21}\); 2) \(\frac{2}{3}\); 3) \(2\frac{1}{7}\); 4) \(\frac{14}{15}\); 5) \(\frac{7}{8}\); 6) \(11\frac{2}{21}\); 7) \(2\frac{1}{2}\); 8) \(2\frac{5}{6}\); 9) \(3\frac{4}{5}\); 10) \(9\frac{5}{6}\); 11) \(9\frac{13}{20}\); 12) \(1\frac{5}{6}\); 13) \(2\frac{13}{24}\); 14) \(8\frac{9}{16}\).