Note: This problem is from Introduction to Computing Systems: From Bits and Beyond(2nd) edition, 3.15, page 86.
I was able to do the problem and ended up with sum being 0010 and the last carry bit of 1.
Using a tow bit full adder, would the last carry bit be appended to the beginning of the sum, making it 10010(18 the correct answer with decimal alue addition)) or does it get omitted, making the answers different?
If it does get appended, how would I justify the answers are the same? The full adder takes account carry bits and binary bits?