Контрольные задания
Вопрос:Фото задания: Вычислите: 7/8 − 2/3; 3/4 − 4/7; 9/16 − 11/24; 11/12 − 11/18; 5/12 − 1/3; 1/5 − 3/20; 7/8 − 5/12; 9/10 − 1/6; 8/18 − 8/27;…Фото задания

Ответ:

  1. \(\frac{7}{8}-\frac{2}{3}=\frac{21}{24}-\frac{16}{24}=\frac{5}{24}\);
  2. \(\frac{3}{4}-\frac{4}{7}=\frac{21}{28}-\frac{16}{28}=\frac{5}{28}\);
  3. \(\frac{9}{16}-\frac{11}{24}=\frac{27}{48}-\frac{22}{48}=\frac{5}{48}\);
  4. \(\frac{11}{12}-\frac{11}{18}=\frac{33}{36}-\frac{22}{36}=\frac{11}{36}\);
  5. \(\frac{5}{12}-\frac{1}{3}=\frac{5}{12}-\frac{4}{12}=\frac{1}{12}\);
  6. \(\frac{1}{5}-\frac{3}{20}=\frac{4}{20}-\frac{3}{20}=\frac{1}{20}\);
  7. \(\frac{7}{8}-\frac{5}{12}=\frac{21}{24}-\frac{10}{24}=\frac{11}{24}\);
  8. \(\frac{9}{10}-\frac{1}{6}=\frac{27}{30}-\frac{5}{30}=\frac{22}{30}=\frac{11}{15}\);
  9. \(\frac{8}{18}-\frac{8}{27}=\frac{24}{54}-\frac{16}{54}=\frac{8}{54}=\frac{4}{27}\);
  10. \(\frac{12}{13}-\frac{15}{26}=\frac{24}{26}-\frac{15}{26}=\frac{9}{26}\);
  11. \(\frac{7}{16}-\frac{5}{24}=\frac{21}{48}-\frac{10}{48}=\frac{11}{48}\);
  12. \(\frac{9}{12}-\frac{1}{3}=\frac{9}{12}-\frac{4}{12}=\frac{5}{12}\);
  13. \(\frac{9}{50}-\frac{3}{40}=\frac{36}{200}-\frac{15}{200}=\frac{21}{200}\);
  14. \(1-\frac{1}{2}=\frac{2}{2}-\frac{1}{2}=\frac{1}{2}\);
  15. \(1-\frac{11}{25}=\frac{25}{25}-\frac{11}{25}=\frac{14}{25}\).