Beautiful. This certainly is more efficient for examples like the one you've shown (2018 - 779), but what about (2018 - 9)? I wonder what method is the most efficient on average.
Beautiful. This certainly is more efficient for examples like the one you've shown (2018 - 779), but what about (2018 - 9)? I wonder what method is the most efficient on average.
RE: Alternative approach to subtractions