ГДЗ Математика 6 клас Істер — Вправа 284

1) $5\frac{7}{10} + 1\frac{8}{15} = 6 + (\frac{21}{30} + \frac{16}{30}) = 6\frac{37}{30} = 7\frac{7}{30};$

2) $7\frac{4}{15} + 1\frac{5}{6} = 8 + (\frac{8}{30} + \frac{25}{30}) = 8\frac{33}{30} = 9\frac{3}{30} = 9\frac{1}{10};$

3) $5\frac{13}{35} + 2\frac{9}{14} = 7 + (\frac{26}{70} + \frac{45}{70}) = 7\frac{71}{70} = 8\frac{1}{70};$

4) $7\frac{17}{36} + 4\frac{5}{8} = 11 + (\frac{34}{72} + \frac{45}{72}) = 11\frac{79}{72} = 12\frac{7}{72}.$