[Solved] Two Binary Numbers

Question 1: Convert 2 base-10 numbers – (106 and -2) –  to 8-bit binary numbers.  Then, add the two binary numbers.  Show your arithmetic.

Question 2: Convert 2 base-10 numbers – (106 and 90) – to 8-bit binary numbers.  Then subtract the second number from the first number.  Show your arithmetic 

Question 3: Is this an efficient way to add/subtract?  Are there any shortcuts?