Add and subtract fractions

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

id: 4892

What is $\frac{4}{13}+\frac{4}{13}$ as a reduced fraction a/b?

id: 4943

What is $\frac{7}{19}-\frac{3}{19}$ as a reduced fraction a/b?

id: 4925

$\frac{6}{12}-\frac{5}{12}=\frac{?}{12}?$