Learn addition, subtraction, geometry, and more while adventuring through a fun and engaging world of characters. Be sure to check out the report card section for detailed information about your child ...

12 - 5 = 7 Just like with addition, we can use a part-whole model to help partition larger numbers to make them easier to deal with in subtraction problems. First, partition 35 into 30 and 5.

There are different methods for addition and subtraction. You may have used column addition and subtraction before but sometimes you can solve additions and subtractions using a mental method.