This question is dealing with hexadecimals, binary numbers etc.
G. 11112 + 10102 =
Just add as though they are decimal numbers. Remember to carry only when the digit sum exceeds 15 (when there are no more hex digits).
Here are the hex digits
Hex decimal value
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
A 10
B 11
C 12
D 13
E 14
F 15
(note: decimal digits can also be written in lower case).