Add and subtract fractions

Answer all the questions below and press submit to see how many you got right.

id: 4927

$\frac{10}{8}-\frac{1}{8}=\frac{?}{8}?$

id: 4952

What is $\frac{8}{15}-\frac{4}{15}$ as a reduced fraction a/b?

id: 4878

$\frac{5}{9}+\frac{4}{9}=\frac{?}{9}?$