Вычислите: 7/18 + 1/27; 29/36 + 5/54; 23/30 + 2/45; 13/24 + 17/36; 15/28 + 22/35; 4/21 − 5/28; 13/16 − 19/24; 7/33 − 1/22; 7/220 + 17/330; 3/140 + 13/210.

Приводим дроби к общему знаменателю, выполняем действие и сокращаем результат, если возможно.

1. \(\frac{7}{18}+\frac{1}{27}=\frac{21}{54}+\frac{2}{54}=\frac{23}{54}\).
2. \(\frac{29}{36}+\frac{5}{54}=\frac{87}{108}+\frac{10}{108}=\frac{97}{108}\).
3. \(\frac{23}{30}+\frac{2}{45}=\frac{69}{90}+\frac{4}{90}=\frac{73}{90}\).
4. \(\frac{13}{24}+\frac{17}{36}=\frac{39}{72}+\frac{34}{72}=\frac{73}{72}\).
5. \(\frac{15}{28}+\frac{22}{35}=\frac{75}{140}+\frac{88}{140}=\frac{163}{140}\).
6. \(\frac{4}{21}-\frac{5}{28}=\frac{16}{84}-\frac{15}{84}=\frac{1}{84}\).
7. \(\frac{13}{16}-\frac{19}{24}=\frac{39}{48}-\frac{38}{48}=\frac{1}{48}\).
8. \(\frac{7}{33}-\frac{1}{22}=\frac{14}{66}-\frac{3}{66}=\frac{1}{6}\).
9. \(\frac{7}{220}+\frac{17}{330}=\frac{21}{660}+\frac{34}{660}=\frac{1}{12}\).
10. \(\frac{3}{140}+\frac{13}{210}=\frac{9}{420}+\frac{26}{420}=\frac{1}{12}\).