Контрольные задания
Вопрос:Фото задания: Выполните действия: 1/2 + 3/10 =; 3/36 + 7/9 =; 7/8 − 2/3 =; 2/5 + 3/20 =; 3/4 − 4/7 =; 1/6 + 5/12 =; 9/16 − 11/24 =; 11/49 +…Фото задания

Ответ:

  1. \(\frac{1}{2}+\frac{3}{10}=\frac{5}{10}+\frac{3}{10}=\frac{8}{10}=\frac{4}{5}\).
  2. \(\frac{3}{36}+\frac{7}{9}=\frac{3}{36}+\frac{28}{36}=\frac{31}{36}\).
  3. \(\frac{7}{8}-\frac{2}{3}=\frac{21}{24}-\frac{16}{24}=\frac{5}{24}\).
  4. \(\frac{2}{5}+\frac{3}{20}=\frac{8}{20}+\frac{3}{20}=\frac{11}{20}\).
  5. \(\frac{3}{4}-\frac{4}{7}=\frac{21}{28}-\frac{16}{28}=\frac{5}{28}\).
  6. \(\frac{1}{6}+\frac{5}{12}=\frac{2}{12}+\frac{5}{12}=\frac{7}{12}\).
  7. \(\frac{9}{16}-\frac{11}{24}=\frac{27}{48}-\frac{22}{48}=\frac{5}{48}\).
  8. \(\frac{11}{49}+\frac{6}{7}=\frac{11}{49}+\frac{42}{49}=\frac{53}{49}=1\frac{4}{49}\).
  9. \(\frac{11}{12}-\frac{11}{18}=\frac{33}{36}-\frac{22}{36}=\frac{11}{36}\).
  10. \(\frac{13}{24}+\frac{5}{8}=\frac{13}{24}+\frac{15}{24}=\frac{28}{24}=\frac{7}{6}=1\frac{1}{6}\).
  11. \(\frac{5}{12}-\frac{1}{3}=\frac{5}{12}-\frac{4}{12}=\frac{1}{12}\).

Ответ: 4/5; 31/36; 5/24; 11/20; 5/28; 7/12; 5/48; 1 4/49; 11/36; 1 1/6; 1/12.