276 решите через 10 минут в школу

Решите задачу:

$1)4 \frac{5}{9} + 7 \frac{1}{6} = 4 + 7 + \frac{5}{9} + \frac{1}{6} = 11 + \frac{5 \times 2 + 1 \times 3}{18} = 11 \frac{13}{18}$
$2)6 \frac{11}{12} + 8 \frac{13}{18} = 14 + \frac{11 \times 3 + 13 \times 2}{36} = 14 + \frac{59}{36} = 15 \frac{23}{36}$
$3)2 \frac{3}{16} + 1 \frac{7}{24} + 3 \frac{1}{12} = 2 + 1 + 3 + \frac{3 \times3 + 7 \times 2 + 1 \times 4 }{48} = 6 + \frac{27}{48} 6 \frac{9}{16}$