Вычислите а) 7 3/3 + 4 6/9 б)15 5/11 + 17 8/11 в) 9 - 3/4 г)18 3/7 - 5 6/7

Решите задачу:

$\frac{9}{1} - \frac{3}{4} = \frac{36}{4} - \frac{3}{4} = \frac{33}{4} = 8 \frac{1}{4}$ $7 \frac{3}{3} + 4 \frac{6}{9} = \frac{24}{3} + \frac{42}{9} = \frac{72}{9} + \frac{42}{9} = \frac{114}{9} = 12 \frac{2}{3}$
$15 \frac{5}{11} + 17 \frac{8}{11} = 32\frac{13}{11} = 33\frac{2}{11}$
$\frac{9}{1} - \frac{3}{4} = \frac{36}{4} - \frac{3}{4} = \frac{33}{4} = 8 \frac{1}{4}$
$18 \frac{3}{7} - 5 \frac{6}{7} = 17 \frac{10}{7} - 5 \frac{6}{7} = 12 \frac{4}{7}$