Вычисли значения выражений в заданиях под номерами 1, 2 и 3

1. Вычислим: a) $5\frac{1}{2} + 1\frac{1}{6} = \frac{11}{2} + \frac{7}{6} = \frac{33}{6} + \frac{7}{6} = \frac{40}{6} = \frac{20}{3} = 6\frac{2}{3}$ б) $2\frac{4}{9} + 3\frac{1}{2} = \frac{22}{9} + \frac{7}{2} = \frac{44}{18} + \frac{63}{18} = \frac{107}{18} = 5\frac{17}{18}$ в) $5\frac{7}{12} + 1\frac{7}{8} = \frac{67}{12} + \frac{15}{8} = \frac{134}{24} + \frac{45}{24} = \frac{179}{24} = 7\frac{11}{24}$ г) $6\frac{2}{5} - 1\frac{1}{10} = \frac{32}{5} - \frac{11}{10} = \frac{64}{10} - \frac{11}{10} = \frac{53}{10} = 5\frac{3}{10}$ д) $4\frac{5}{7} - 1\frac{2}{3} = \frac{33}{7} - \frac{5}{3} = \frac{99}{21} - \frac{35}{21} = \frac{64}{21} = 3\frac{1}{21}$ e) $3\frac{1}{2} - 1\frac{2}{3} = \frac{7}{2} - \frac{5}{3} = \frac{21}{6} - \frac{10}{6} = \frac{11}{6} = 1\frac{5}{6}$ 2. Вычислим: $15\frac{1}{2} - (6\frac{1}{4} + 2\frac{3}{8}) = 15\frac{1}{2} - (6\frac{2}{8} + 2\frac{3}{8}) = 15\frac{1}{2} - 8\frac{5}{8} = 15\frac{4}{8} - 8\frac{5}{8} = 14\frac{12}{8} - 8\frac{5}{8} = 6\frac{7}{8}$ 3. Вычислим: $(12\frac{13}{37} + 11\frac{11}{17}) + (13\frac{25}{37} + 14\frac{6}{17}) = (12\frac{13}{37} + 13\frac{25}{37}) + (11\frac{11}{17} + 14\frac{6}{17}) = 25\frac{38}{37} + 25\frac{17}{17} = 25 + 1\frac{1}{37} + 25 + 1 = 52\frac{1}{37}$