EFFECTIVE MENTAL MATH ADDITION STRATEGIES (and free quick reference
Mental Math Chart. This trick works for two numbers that are just over 100, as long as the last two digits of both numbers.
This trick works for two numbers that are just over 100, as long as the last two digits of both numbers.
This trick works for two numbers that are just over 100, as long as the last two digits of both numbers. This trick works for two numbers that are just over 100, as long as the last two digits of both numbers.
