219. Выполните сложение: a) 3 7/11 + 2/11; б) 6 2/15 + 3 9/15; в) 8 + 3 7/8; г) 4 5/9 + 3; д) 7 13/20 + 8 7/20; e) 2 18/25 + 7 8/25;

a) \(3\frac{7}{11} + \frac{2}{11} = 3\frac{7+2}{11} = 3\frac{9}{11}\) б) \(6\frac{2}{15} + 3\frac{9}{15} = (6+3) + \frac{2+9}{15} = 9\frac{11}{15}\) в) \(8 + 3\frac{7}{8} = 11\frac{7}{8}\) г) \(4\frac{5}{9} + 3 = 7\frac{5}{9}\) д) \(7\frac{13}{20} + 8\frac{7}{20} = (7+8) + \frac{13+7}{20} = 15\frac{20}{20} = 15 + 1 = 16\) e) \(2\frac{18}{25} + 7\frac{8}{25} = (2+7) + \frac{18+8}{25} = 9\frac{26}{25} = 9 + 1\frac{1}{25} = 10\frac{1}{25}\) Ответы: a) \(3\frac{9}{11}\), б) \(9\frac{11}{15}\), в) \(11\frac{7}{8}\), г) \(7\frac{5}{9}\), д) 16, e) \(10\frac{1}{25}\)