6.16\/Вычислите: a) 7+5-2류+2유 6)9-50+4+2

6.16 Вычислите:

a) $$7\frac{5}{11} + 5\frac{8}{11} - 2\frac{2}{11} + 2\frac{8}{11} = (7 + 5 - 2 + 2) + (\frac{5}{11} + \frac{8}{11} - \frac{2}{11} + \frac{8}{11}) = 12 + \frac{5 + 8 - 2 + 8}{11} = 12 + \frac{19}{11} = 12 + 1\frac{8}{11} = 13\frac{8}{11}$$

Ответ: $$13\frac{8}{11}$$

б) $$9\frac{6}{15} - 5\frac{3}{5} + 4\frac{4}{15} + 2\frac{2}{5} = 9\frac{6}{15} - 5\frac{9}{15} + 4\frac{4}{15} + 2\frac{6}{15} = (9 - 5 + 4 + 2) + (\frac{6}{15} - \frac{9}{15} + \frac{4}{15} + \frac{6}{15}) = 10 + \frac{6 - 9 + 4 + 6}{15} = 10 + \frac{7}{15} = 10\frac{7}{15}$$

Ответ: $$10\frac{7}{15}$$