how do you add these hexadecimals??

Question

ABCD
+ AAA
________

I am lost. Can someone explain this to me??

Answer 1

In hexadecimal
A = 10
B = 11
C = 12
D = 13

When you add if the total is 16 or greater carry a one.

ABCD
+ AAA
_______

D + A = 13 + 10 base ten = 23 = 16 + 7 = 17 hexadecimal
Write down 7 and carry 1

1 + C + A = 1 + 12 + 10 base ten = 23 = 16 + 7 = 17 hex
Write down 7 and carry 1

1 + B + A = 1 + 11 + 10 base ten = 22 = 16 + 6 = 16 hex
Write down 6 and carry 1

1 + A = B hex

The answer is

B677 hexadecimal

Answer 2

hexa decimal numbers are 0123456789ABCDEF
for example, F+1=10,
hexa decimal is modulo 16.
case study...
A represents 10, B represents 11, ..., F represents 15.
so A+B = 10 + 11 = 21, using hexadecimal number sequance, count 0 until 21 step. if you reach E, add a "1" then go back to 0 and continue your count until 21, you will be stoped at 5, so A+B=15