Контрольные задания
Вопрос:

а) \(5\frac{1}{6}+3\frac{1}{18}\); б) \(5\frac{1}{8}+3\frac{2}{5}\); в) \(3\frac{2}{25}+4\frac{14}{15}\); г) \(7\frac{11}{15}-3\frac{3}{20}\); д) \(3\frac{5}{6}-1\frac{4}{5}\); е) \(6\frac{1}{2}-2\frac{4}{5}\).

Фото задания: а) \(5\frac{1}{6}+3\frac{1}{18}\); б) \(5\frac{1}{8}+3\frac{2}{5}\); в) \(3\frac{2}{25}+4\frac{14}{15}\); г)…Фото задания

Ответ:

  1. \(5\frac{1}{6}+3\frac{1}{18}=8+\frac{3}{18}+\frac{1}{18}=8\frac{2}{9}\).
  2. \(5\frac{1}{8}+3\frac{2}{5}=8+\frac{5}{40}+\frac{16}{40}=8\frac{21}{40}\).
  3. \(3\frac{2}{25}+4\frac{14}{15}=7+\frac{6}{75}+\frac{70}{75}=7\frac{76}{75}=8\frac{1}{75}\).
  4. \(7\frac{11}{15}-3\frac{3}{20}=4+\frac{44}{60}-\frac{9}{60}=4\frac{35}{60}=4\frac{7}{12}\).
  5. \(3\frac{5}{6}-1\frac{4}{5}=2+\frac{25}{30}-\frac{24}{30}=2\frac{1}{30}\).
  6. \(6\frac{1}{2}-2\frac{4}{5}=3\frac{10}{10}-2\frac{8}{10}=3\frac{2}{10}=3\frac{1}{5}\).

Ответ: а) \(8\frac{2}{9}\); б) \(8\frac{21}{40}\); в) \(8\frac{1}{75}\); г) \(4\frac{7}{12}\); д) \(2\frac{1}{30}\); е) \(3\frac{1}{5}\).