Контрольные задания
Вопрос:Фото задания: Вычислите: 3/5 + 4/5; 1 − 2/7; 4 2/5 + 2 1/5; 3 8/11 − 1 6/11; 5/7 + 2; 2 3/8 + 5/8; 3 2/7 + 4/7; 6 − 2 1/3; 4 18/23 + 2…Фото задания

Ответ:

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