Verified answer

Решение:

[tex]1) 1-\frac{14}{31} +\frac{16}{31} =1 +\frac{16-14}{31}= 1\frac{2}{31}[/tex]

[tex]2) 14\frac{1}{15} -(5\frac{8}{15} +6\frac{9}{15})= 14\frac{1}{15}-11\frac{8+9}{15} =14\frac{1}{15}-11\frac{17}{15} =14\frac{1}{15}-12\frac{2}{15} =1\frac{16-2}{15}=1\frac{14}{15}[/tex]