Why are we extending our number of digits by adding zeros to the left to complete the arithmetic operations?

44 Views Asked by At

For the sake of subtraction, we used complements instead of subtracting, but we did we extend to 6 digits? And why 6 digits not 4 or 5?

enter image description here

ANSWERS:

enter image description here

General rule for arithmatics with complements:

enter image description here