Обчисли:
Розв'язок:
1) $9\frac{2}{3} + 2 = 9 + 2 + \frac{2}{3} = 11\frac{2}{3}$;
2) $7 + 3\frac{2}{11} = 7 + 3 + \frac{2}{11} = 10\frac{2}{11}$;
3) $1\frac{1}{12} + \frac{1}{4} = 1\frac{1}{12} + \frac{3}{12} =$
$= 1\frac{4}{12} = 1\frac{1}{3}$;
4) $7\frac{4}{15} + \frac{1}{5} = 7\frac{4}{15} + \frac{3}{15} = 7\frac{7}{15}$;
5) $12\frac{1}{3} - 2 = 10\frac{1}{3}$;
6) $4 - 1\frac{5}{13} = 3\frac{13}{13} - 1\frac{5}{13} = 2\frac{8}{13}$;
7) $7\frac{1}{4} - \frac{1}{16} = 7\frac{4}{16} - \frac{1}{16} = 7\frac{3}{16}$;
8) $4\frac{7}{20} - \frac{1}{4} = 4\frac{7}{20} - \frac{5}{20} =$
$= 4\frac{2}{20} = 4\frac{1}{10}$.