Вопрос:

а) 5 4/7 + 8 3/7 = 13 7/7 = ___; б) 6 2/9 + 2 8/9 = 8 10/9 = 8 + 1 1/9 = ___; в) 5 7/8 + 2 3/8 = 7 + ___; г) 6 8/9 + 4/9 = 6 + ___; д) 8 6/10 − 3 7/10 = 7 16/10 − 3 7/10 = 4 + ___; е) 5 8/10 − 2 9/10 = 4 18/10 − 2 9/10 = ___; ж) 7 5/8 + 3 4/8 = ___; з) 9 3/14 − 7 5/14 = ___; и) 2 2/5 + 3 3/5 = ___; к) 4 3/7 − 2 3/7 = ___.

Ответ:

  1. \(5\frac{4}{7}+8\frac{3}{7}=13\frac{7}{7}=14\).
  2. \(6\frac{2}{9}+2\frac{8}{9}=8\frac{10}{9}=9\frac{1}{9}\).
  3. \(5\frac{7}{8}+2\frac{3}{8}=7\frac{10}{8}=8\frac{2}{8}=8\frac{1}{4}\).
  4. \(6\frac{8}{9}+\frac{4}{9}=6\frac{12}{9}=7\frac{3}{9}=7\frac{1}{3}\).
  5. \(8\frac{6}{10}-3\frac{7}{10}=7\frac{16}{10}-3\frac{7}{10}=4\frac{9}{10}\).
  6. \(5\frac{8}{10}-2\frac{9}{10}=4\frac{18}{10}-2\frac{9}{10}=2\frac{9}{10}\).
  7. \(7\frac{5}{8}+3\frac{4}{8}=10\frac{9}{8}=11\frac{1}{8}\).
  8. \(9\frac{3}{14}-7\frac{5}{14}=8\frac{17}{14}-7\frac{5}{14}=1\frac{12}{14}=1\frac{6}{7}\).
  9. \(2\frac{2}{5}+3\frac{3}{5}=5\).
  10. \(4\frac{3}{7}-2\frac{3}{7}=2\).
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