Вычислите: №1 (а,в)

а) $$rac{5}{8} + \frac{3}{16} = \frac{5*2}{8*2} + \frac{3}{16} = \frac{10}{16} + \frac{3}{16} = \frac{10+3}{16} = \frac{13}{16}$$
Ответ: $$rac{13}{16}$$
в) $$1 + \frac{2}{9} + \frac{2}{8} = 1 + \frac{2}{9} + \frac{1}{4} = 1 + \frac{2*4}{9*4} + \frac{1*9}{4*9} = 1 + \frac{8}{36} + \frac{9}{36} = 1 + \frac{8+9}{36} = 1 + \frac{17}{36} = 1\frac{17}{36}$$
Ответ: $$1\frac{17}{36}$$