Вuпомиите дели 1)12-514 13 13 13 = 5157.12= " 6/7-3101010 - 2/65.9 14 14

Решение:

1. $$ \frac{12}{13} - \frac{5}{13} + \frac{4}{13} = \frac{12 - 5 + 4}{13} = \frac{11}{13} $$
2. $$ 5 \frac{7}{11} + 1 \frac{9}{11} = (5 + 1) + (\frac{7}{11} + \frac{9}{11}) = 6 + \frac{16}{11} = 6 + 1 \frac{5}{11} = 7 \frac{5}{11} $$
3. $$ 7 - 3 \frac{9}{9} = 7 - 3 - \frac{9}{9} = 4 - 1 = 3 $$
4. $$ 6 \frac{5}{14} - 4 \frac{9}{14} = (6 - 4) + (\frac{5}{14} - \frac{9}{14}) = 2 - \frac{4}{14} = 1 \frac{14}{14} - \frac{4}{14} = 1 \frac{10}{14} = 1 \frac{5}{7} $$

Ответ:

1. $$\frac{11}{13}$$
2. $$7 \frac{5}{11}$$
3. $$3$$
4. $$1 \frac{5}{7}$$