whats 6+7

1/2+2/6 = 5/6

$\begin{array}{rcl} \frac12+\frac26 \\ &=& \frac12 \cdot \frac33 +\frac26 \\ &=& \frac36 +\frac26 \\ &=& \frac56 \\ \mathbf{\frac12+\frac26} & \mathbf{=}&\mathbf{\frac56} = 0.83\overline{3} \end{array}$