Задание 4

Вычислим:

$$\frac{8}{9} + 2\frac{5}{18} - 1\frac{7}{36} = \frac{8}{9} + \frac{41}{18} - \frac{43}{36} = \frac{32}{36} + \frac{82}{36} - \frac{43}{36} = \frac{32+82-43}{36} = \frac{71}{36} = 1\frac{35}{36}$$

Ответ: $$1\frac{35}{36}$$