Вопрос:

На изображении записаны задания 1–20: вычислить значения выражений.

Ответ:

  1. \(1-\frac{11}{12}=\frac{1}{12}\).
  2. \(2-\frac{5}{22}=\frac{44}{22}-\frac{5}{22}=\frac{39}{22}=1\frac{17}{22}\).
  3. \(13-8\frac{5}{12}=12\frac{12}{12}-8\frac{5}{12}=4\frac{7}{12}\).
  4. \(6\frac{2}{7}+3\frac{1}{7}=9\frac{3}{7}\).
  5. \(15-2\frac{3}{8}=14\frac{8}{8}-2\frac{3}{8}=12\frac{5}{8}\).
  6. \(20-19\frac{3}{4}=19\frac{4}{4}-19\frac{3}{4}=\frac{1}{4}\).
  7. \(3-\frac{2}{11}=2\frac{9}{11}\).
  8. \(4-3\frac{4}{9}=3\frac{9}{9}-3\frac{4}{9}=\frac{5}{9}\).
  9. \(7\frac{3}{8}-6\frac{7}{8}=6\frac{11}{8}-6\frac{7}{8}=\frac{4}{8}=\frac{1}{2}\).
  10. \(45-44\frac{3}{8}=44\frac{8}{8}-44\frac{3}{8}=\frac{5}{8}\).
  11. \(6\frac{7}{15}-3\frac{1}{15}=3\frac{6}{15}=3\frac{2}{5}\).
  12. \(3\frac{5}{16}-2\frac{1}{16}=1\frac{4}{16}=1\frac{1}{4}\).
  13. \(\frac{1}{8}+2\frac{7}{8}=3\).
  14. \(3\frac{7}{12}-1\frac{7}{12}=2\).
  15. \(6\frac{7}{12}-3\frac{11}{12}=5\frac{19}{12}-3\frac{11}{12}=2\frac{8}{12}=2\frac{2}{3}\).
  16. \(1\frac{3}{17}-\frac{10}{17}=\frac{20}{17}-\frac{10}{17}=\frac{10}{17}\).
  17. \(1\frac{1}{6}-\frac{5}{6}=\frac{7}{6}-\frac{5}{6}=\frac{1}{3}\).
  18. \(6\frac{7}{12}-5\frac{11}{12}=5\frac{19}{12}-5\frac{11}{12}=\frac{8}{12}=\frac{2}{3}\).
  19. \(7-\frac{6}{35}=6\frac{35}{35}-\frac{6}{35}=6\frac{29}{35}\).
  20. \(8-7\frac{3}{7}=7\frac{7}{7}-7\frac{3}{7}=\frac{4}{7}\).