Задание 38. Найдите сумму: 1) 2 1/3 + 1 1/6; 2) 1 2/5 + 1 1/10; 3) 1 2/7 + 2 3/14; 4) 4 8/9 + 3 11/18; 5) 3 5/7 + 1 2/21; 6) 2 2/5 + 2 11/25; 7) 6 4/9 + 4 2/3; 8) 3 7/8 + 2 3/4; 9) 6 11/12 + 1 5/6; 10) 9 4/5 + 2 9/20.

Складываем целые части и дробные части; дроби приводим к общему знаменателю.

1. \(2\frac{1}{3}+1\frac{1}{6}=3\frac{1}{2}\).
2. \(1\frac{2}{5}+1\frac{1}{10}=2\frac{1}{2}\).
3. \(1\frac{2}{7}+2\frac{3}{14}=3\frac{1}{2}\).
4. \(4\frac{8}{9}+3\frac{11}{18}=7+\frac{16}{18}+\frac{11}{18}=8\frac{1}{2}\).
5. \(3\frac{5}{7}+1\frac{2}{21}=4\frac{17}{21}\).
6. \(2\frac{2}{5}+2\frac{11}{25}=4\frac{21}{25}\).
7. \(6\frac{4}{9}+4\frac{2}{3}=10+\frac{4}{9}+\frac{6}{9}=11\frac{1}{9}\).
8. \(3\frac{7}{8}+2\frac{3}{4}=5+\frac{7}{8}+\frac{6}{8}=6\frac{5}{8}\).
9. \(6\frac{11}{12}+1\frac{5}{6}=7+\frac{11}{12}+\frac{10}{12}=8\frac{3}{4}\).
10. \(9\frac{4}{5}+2\frac{9}{20}=11+\frac{16}{20}+\frac{9}{20}=12\frac{1}{4}\).