22. Найдите сумму или разность: 21/66 + 22/66; 21/10 − 1/10; 44/23 − 10/23; 41/100 + 77/100; 65/15 − 24/15; 7/13 + 11/13; 55/9 − 12/9; 66/20 − 43/20; 36/31 − 5/31; 21/25 + 44/25; 16/23 + 2/23 + 11/23; 15/46 + 29/46 + 20/46.

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Accepted Answer

\(\frac{21}{66}+\frac{22}{66}=\frac{43}{66}\).
\(\frac{21}{10}-\frac{1}{10}=\frac{20}{10}=2\).
\(\frac{44}{23}-\frac{10}{23}=\frac{34}{23}=1\frac{11}{23}\).
\(\frac{41}{100}+\frac{77}{100}=\frac{118}{100}=1\frac{18}{100}=1\frac{9}{50}\).
\(\frac{65}{15}-\frac{24}{15}=\frac{41}{15}=2\frac{11}{15}\).
\(\frac{7}{13}+\frac{11}{13}=\frac{18}{13}=1\frac{5}{13}\).
\(\frac{55}{9}-\frac{12}{9}=\frac{43}{9}=4\frac{7}{9}\).
\(\frac{66}{20}-\frac{43}{20}=\frac{23}{20}=1\frac{3}{20}\).
\(\frac{36}{31}-\frac{5}{31}=\frac{31}{31}=1\).
\(\frac{21}{25}+\frac{44}{25}=\frac{65}{25}=2\frac{15}{25}=2\frac{3}{5}\).
\(\frac{16}{23}+\frac{2}{23}+\frac{11}{23}=\frac{29}{23}=1\frac{6}{23}\).
\(\frac{15}{46}+\frac{29}{46}+\frac{20}{46}=\frac{64}{46}=1\frac{18}{46}=1\frac{9}{23}\).

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