Вопрос:

Вычислите: а) 5/9 − 2/9; б) 4/12 + 1/12; в) 17/20 − 13/20; г) 19/20 − 9/20; д) 15/22 + 2/22; е) 5/33 + 8/33; ж) 17/150 + 13/150; з) 78/100 − 27/100; и) 43/44 − 21/44.

Ответ:

  1. \(\frac{5}{9}-\frac{2}{9}=\frac{5-2}{9}=\frac{3}{9}=\frac{1}{3}\).
  2. \(\frac{4}{12}+\frac{1}{12}=\frac{5}{12}\).
  3. \(\frac{17}{20}-\frac{13}{20}=\frac{4}{20}=\frac{1}{5}\).
  4. \(\frac{19}{20}-\frac{9}{20}=\frac{10}{20}=\frac{1}{2}\).
  5. \(\frac{15}{22}+\frac{2}{22}=\frac{17}{22}\).
  6. \(\frac{5}{33}+\frac{8}{33}=\frac{13}{33}\).
  7. \(\frac{17}{150}+\frac{13}{150}=\frac{30}{150}=\frac{1}{5}\).
  8. \(\frac{78}{100}-\frac{27}{100}=\frac{51}{100}\).
  9. \(\frac{43}{44}-\frac{21}{44}=\frac{22}{44}=\frac{1}{2}\).