ГДЗ Математика 6 клас Істер — Вправа 240

1) $5\frac{5}{8} + \frac{7}{8} = 5\frac{12}{8} = 6\frac{4}{8} = 6\frac{1}{2};$

2) $7\frac{1}{9} + 19\frac{8}{9} = 26\frac{9}{9} = 27;$

3) $4\frac{3}{7} - 2\frac{1}{7} = 2\frac{2}{7};$

4) $9\frac{1}{9} - 5\frac{4}{9} = 8\frac{10}{9} - 5\frac{4}{9} = 3\frac{6}{9} = 3\frac{2}{3};$

5) $2\frac{1}{3} + 5\frac{2}{3} - 4\frac{1}{8} = 7\frac{3}{3} - 4\frac{1}{8} = 8 - 4\frac{1}{8} = 7\frac{8}{8} - 4\frac{1}{8} = 3\frac{7}{8};$

6) $\frac{3}{5} + \frac{2}{5} + \frac{7}{9} + \frac{2}{9} - 1\frac{1}{2} = 1 + 1 - 1\frac{1}{2} = 2 - 1\frac{1}{2} = \frac{1}{2}.$