2) Найди значения сумм: 2 1 + 15 = 16 16 9 11 + 1 6 = 11 3윽 +17= 12 +53 15 15

a) $$ \frac{2}{16} + \frac{15}{16} = \frac{2+15}{16} = \frac{17}{16} = 1\frac{1}{16} $$

б) $$ \frac{9}{11} + 1\frac{6}{11} = 1 + \frac{9}{11} + \frac{6}{11} = 1 + \frac{9+6}{11} = 1 + \frac{15}{11} = 1 + 1\frac{4}{11} = 2\frac{4}{11} $$

в) $$3\frac{6}{7} + 1\frac{5}{7} = 3 + 1 + \frac{6}{7} + \frac{5}{7} = 4 + \frac{6+5}{7} = 4 + \frac{11}{7} = 4 + 1\frac{4}{7} = 5\frac{4}{7}$$

г) $$ \frac{12}{15} + 5\frac{3}{15} = 5 + \frac{12}{15} + \frac{3}{15} = 5 + \frac{12+3}{15} = 5 + \frac{15}{15} = 5 + 1 = 6 $$

Ответ:

a) 1 1/16
б) 2 4/11
в) 5 4/7
г) 6