Вычислите: 1) 6 5/13 + 2 8/13; 2) 5 4/7 + 3 6/7; 3) 1 - 15/19; 4) 8 - 3 4/9; 5) 7 3/8 - 2 5/8; 6) 14 15/32 - 9 19/32

**Ответы:** 1) **$8 \frac{13}{13} = 9$** 2) **$8 \frac{10}{7} = 9 \frac{3}{7}$** 3) **$\frac{4}{19}$** 4) **$4 \frac{5}{9}$** 5) **$4 \frac{6}{8} = 4 \frac{3}{4}$** 6) **$4 \frac{28}{32} = 4 \frac{7}{8}$** **Решение:** 1) $6 \frac{5}{13} + 2 \frac{8}{13} = (6 + 2) + (\frac{5}{13} + \frac{8}{13}) = 8 + \frac{13}{13} = 8 + 1 = 9$ 2) $5 \frac{4}{7} + 3 \frac{6}{7} = (5 + 3) + (\frac{4}{7} + \frac{6}{7}) = 8 + \frac{10}{7} = 8 + 1 \frac{3}{7} = 9 \frac{3}{7}$ 3) $1 - \frac{15}{19} = \frac{19}{19} - \frac{15}{19} = \frac{4}{19}$ 4) $8 - 3 \frac{4}{9} = 7 \frac{9}{9} - 3 \frac{4}{9} = (7 - 3) + (\frac{9}{9} - \frac{4}{9}) = 4 \frac{5}{9}$ 5) $7 \frac{3}{8} - 2 \frac{5}{8} = 6 \frac{11}{8} - 2 \frac{5}{8} = (6 - 2) + (\frac{11}{8} - \frac{5}{8}) = 4 \frac{6}{8} = 4 \frac{3}{4}$ 6) $14 \frac{15}{32} - 9 \frac{19}{32} = 13 \frac{47}{32} - 9 \frac{19}{32} = (13 - 9) + (\frac{47}{32} - \frac{19}{32}) = 4 \frac{28}{32} = 4 \frac{7}{8}$