ГДЗ Математика 6 клас Істер — Вправа 298

1) $4\frac{1}{12} + 5\frac{7}{16} + 6\frac{5}{12} = (4\frac{1}{12} + 6\frac{5}{12}) + 5\frac{7}{16} = 10\frac{6}{12} + 5\frac{7}{16} =$

$= 10\frac{1}{2} + 5\frac{7}{16} = 10\frac{8}{16} + 5\frac{7}{16} = 15\frac{15}{16};$

2) $3\frac{11}{13} + 1\frac{3}{8} + 4\frac{7}{16} + 5\frac{2}{13} = (3\frac{11}{13} + 5\frac{2}{13}) + (1\frac{3}{8} + 4\frac{7}{16}) =$

$= 8\frac{13}{13} + (1\frac{6}{16} + 4\frac{7}{16}) = 9 + 5\frac{13}{16} = 14\frac{13}{16}.$