Question

Hello, stuck on these can someone please help.:)

Answer 1

Step-by-step explanation:

9.

$\frac{8}{9} + \frac{5}{9} = \frac{8 + 5}{9} = \frac{13}{9}$

10.

$\frac{6}{12} + ( - \frac{14}{12} ) = \frac{6 - 14}{12}$

11.

$\frac{ - 6 + 3}{8} = \frac{ - 3}{8}$

12.

$\frac{9 - 7}{20} = \frac{2}{20} = \frac{1}{10}$