What is meant by "carry Bit from Previous addition" in Full Adder?
For example if you want to add 2 numbers 2 bits each. $$AB+CD$$ First you preform B+D+0 (because you have no carry from a previous addition) and then you preform A+C+carry from a previous addition, i.e. from adding B+C. You do this the same way you do a long addition you did in school.