Выполните действия.
а) $7\frac{1}{2} + 4 = (7 + 4) + \frac{1}{2} = 11\frac{1}{2}$
б) $7\frac{1}{2} - 4 = (7 - 4) + \frac{1}{2} = 3\frac{1}{2}$
в) $13\frac{3}{7} + 5 =$
г) $2\frac{8}{9} + 19 =$
д) $37\frac{5}{9} - 9 =$
е) $4\frac{13}{15} - 4 =$
ж) $15\frac{1}{10} - 8 =$
з) $34\frac{5}{11} + 9 =$

$7\frac{1}{2} + 4 = (7 + 4) + \frac{1}{2} = 11\frac{1}{2}$
$7\frac{1}{2} - 4 = (7 - 4) + \frac{1}{2} = 3\frac{1}{2}$
$13\frac{3}{7} + 5 = (13 + 5) + \frac{3}{7} = 18\frac{3}{7}$
$2\frac{8}{9} + 19 = (2 + 19) + \frac{8}{9} = 21\frac{8}{9}$
$37\frac{5}{9} - 9 = (37 - 9) + \frac{5}{9} = 28\frac{5}{9}$
$4\frac{13}{15} - 4 = (4 - 4) + \frac{13}{15} = \frac{13}{15}$
$15\frac{1}{10} - 8 = (15 - 8) + \frac{1}{10} = 7\frac{1}{10}$
$34\frac{5}{11} + 9 = (34 + 9) + \frac{5}{11} = 43\frac{5}{11}$