Hi zatarra13,
you can't display '10' using the 7483. It is a binary full adder, meaning its counting sequence ranges from zero to fifteen. The carry output is only active if the count exceeds 15, so it can't be used to indicate '10'.
However the numbers 0 through 15 should be displayed as normal numeric values followed by the letters A trough F representing the values 10 through 15.
The 7447 is not quite suitable because it displays symbols instead of letters.
Try the 7448 which should display the correct values and letters.
Boncuk