Контрольные задания
Вопрос:Фото задания: 11) 15/81 + 2/9; 12) 7/49 + 1/7; 13) 3/2 + 10/16; 14) 10/64 + 1/8; 15) 7/3 + 14/27; 16) 8/10 + 1/100; 17) 11/100 + 1/5.Фото задания

Ответ:

  1. \(\frac{15}{81}+\frac{2}{9}=\frac{5}{27}+\frac{6}{27}=\frac{11}{27}\).
  2. \(\frac{7}{49}+\frac{1}{7}=\frac{1}{7}+\frac{1}{7}=\frac{2}{7}\).
  3. \(\frac{3}{2}+\frac{10}{16}=\frac{3}{2}+\frac{5}{8}=\frac{12}{8}+\frac{5}{8}=\frac{17}{8}=2\frac{1}{8}\).
  4. \(\frac{10}{64}+\frac{1}{8}=\frac{5}{32}+\frac{4}{32}=\frac{9}{32}\).
  5. \(\frac{7}{3}+\frac{14}{27}=\frac{63}{27}+\frac{14}{27}=\frac{77}{27}=2\frac{23}{27}\).
  6. \(\frac{8}{10}+\frac{1}{100}=\frac{80}{100}+\frac{1}{100}=\frac{81}{100}\).
  7. \(\frac{11}{100}+\frac{1}{5}=\frac{11}{100}+\frac{20}{100}=\frac{31}{100}\).