- a) $$4\frac{13}{24} + \frac{1}{8} - 3 = 4\frac{13}{24} + \frac{3}{24} - 3 = 4\frac{16}{24} - 3 = 1\frac{2}{3}$$
- б) $$3\frac{8}{9} + 1\frac{1}{4} + \frac{1}{9} = 3\frac{32}{36} + 1\frac{9}{36} + \frac{4}{36} = 4\frac{45}{36} = 5\frac{1}{4}$$
Ответ: a) $$1\frac{2}{3}$$; б) $$5\frac{1}{4}$$