Контрольные задания
Вопрос:

1. Вычислите: 1) \(7+\frac{8}{19}\); 2) \(\frac{8}{68}+9\); 3) \(3\frac{5}{16}+4\frac{7}{16}\); 4) \(12\frac{8}{13}-8\frac{4}{13}\); 5) \(5\frac{17}{21}-3\frac{8}{21}+4\frac{7}{21}\); 6) \(14\frac{8}{10}+5\frac{1}{10}-6\frac{7}{10}\).

Фото задания: 1. Вычислите: 1) \(7+\frac{8}{19}\); 2) \(\frac{8}{68}+9\); 3) \(3\frac{5}{16}+4\frac{7}{16}\); 4)…Фото задания

Ответ:

  1. \(7+\frac{8}{19}=7\frac{8}{19}\).
  2. \(\frac{8}{68}+9=\frac{2}{17}+9=9\frac{2}{17}\).
  3. \(3\frac{5}{16}+4\frac{7}{16}=7\frac{12}{16}=7\frac{3}{4}\).
  4. \(12\frac{8}{13}-8\frac{4}{13}=4\frac{4}{13}\).
  5. \(5\frac{17}{21}-3\frac{8}{21}+4\frac{7}{21}=2\frac{9}{21}+4\frac{7}{21}=6\frac{16}{21}\).
  6. \(14\frac{8}{10}+5\frac{1}{10}-6\frac{7}{10}=19\frac{9}{10}-6\frac{7}{10}=13\frac{2}{10}=13\frac{1}{5}\).

Ответ: 1) \(7\frac{8}{19}\); 2) \(9\frac{2}{17}\); 3) \(7\frac{3}{4}\); 4) \(4\frac{4}{13}\); 5) \(6\frac{16}{21}\); 6) \(13\frac{1}{5}\).