(7\frac{4}{13} - 4\frac{4}{13}) : 0,15 - 4 : (13\frac{6}{13} + 11\frac{7}{13})

Решение:

1. 7\frac{4}{13} = \frac{95}{13}
2. 4\frac{4}{13} = \frac{56}{13}
3. \frac{95}{13} - \frac{56}{13} = \frac{39}{13} = 3
4. 3 : 0.15 = 20
5. 13\frac{6}{13} = \frac{175}{13}
6. 11\frac{7}{13} = \frac{150}{13}
7. \frac{175}{13} + \frac{150}{13} = \frac{325}{13} = 25
8. 4 : 25 = 0.16
9. 20 - 0.16 = 19.84

Ответ: 19.84