Контрольные задания
Вопрос:Фото задания: Обыкновенные дроби: вычислите 6/35 : 5/7; 8/11 : 7/11; 2/3 : 5/6; 1/16 : 1/2; 15/28 : 20/49; 10 : 7/10; 11 : 1/4; 12 : 3/4;…Фото задания

Ответ:

  1. \(\frac{6}{35}:\frac{5}{7}=\frac{6}{35}\cdot\frac{7}{5}=\frac{6}{25}\).
  2. \(\frac{8}{11}:\frac{7}{11}=\frac{8}{11}\cdot\frac{11}{7}=\frac{8}{7}\).
  3. \(\frac{2}{3}:\frac{5}{6}=\frac{2}{3}\cdot\frac{6}{5}=\frac{4}{5}\).
  4. \(\frac{1}{16}:\frac{1}{2}=\frac{1}{16}\cdot2=\frac{1}{8}\).
  5. \(\frac{15}{28}:\frac{20}{49}=\frac{15}{28}\cdot\frac{49}{20}=\frac{21}{16}\).
  6. \(10:\frac{7}{10}=10\cdot\frac{10}{7}=\frac{100}{7}=14\frac{2}{7}\).
  7. \(11:\frac{1}{4}=11\cdot4=44\).
  8. \(12:\frac{3}{4}=12\cdot\frac{4}{3}=16\).
  9. \(\frac{16}{21}:\frac{20}{49}=\frac{16}{21}\cdot\frac{49}{20}=\frac{28}{15}\).
  10. \(1:\frac{2}{7}=1\cdot\frac{7}{2}=\frac{7}{2}=3\frac{1}{2}\).
  11. \(1:\frac{5}{6}=\frac{6}{5}=1\frac{1}{5}\).
  12. \(1:\frac{2}{3}=\frac{3}{2}=1\frac{1}{2}\).