Adding Fractions by Boxed Rockets

\frac{2}{4} + \frac{1}{4}

\frac{3}{4}

\frac{1}{6} + \frac{3}{6}

\frac{4}{6} = \frac{2}{3}

\frac{2}{7} + \frac{3}{7}

\frac{5}{7}

\frac{3}{6} + \frac{3}{12}

\frac{9}{12} = \frac{3}{4}

\frac{6}{12} + \frac{3}{6}

\frac{12}{12} = 1

\frac{1}{4} + \frac{4}{12}

\frac{7}{12}