Решите пример: a) $$\frac{4}{11}+2\frac{9}{11}$$; б) $$5\frac{11}{14}-2\frac{2}{7}$$

Решим примеры:

1. $$\frac{4}{11}+2\frac{9}{11} = 2\frac{4+9}{11} = 2\frac{13}{11} = 2 + \frac{11}{11} + \frac{2}{11} = 2 + 1 + \frac{2}{11} = 3\frac{2}{11}$$
2. $$5\frac{11}{14}-2\frac{2}{7} = 5\frac{11}{14}-2\frac{2 \cdot 2}{7 \cdot 2} = 5\frac{11}{14}-2\frac{4}{14} = (5-2) + \frac{11-4}{14} = 3\frac{7}{14} = 3\frac{1}{2}$$

Ответ: а) $$3\frac{2}{11}$$; б) $$3\frac{1}{2}$$