Add and subtract fractions

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

id: 4928

$\frac{6}{17}-\frac{3}{17}=\frac{?}{17}?$

id: 4887

$\frac{3}{17}+\frac{3}{17}=\frac{?}{17}?$

id: 4878

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