Develop fluency at recalling basic addition facts and related subtraction facts. 0206.2.7

Links verified on 11/28/2009

1. Column Addition Method -This method can be used for adding any addition problems with 2 or more digit numbers, one column (place value) at a time
2. Short Addition Method - performed from right to left adding one place value at a time, re-grouping each place values sum to the next largest place value on the left.
3. Trade First Subtraction Method - this method is performed from right to left subtracting one place value at a time
4. Partial Sums Addition Method - performed from left to right and can be used for adding any addition problems with 2 or more digit numbers, one place value at a time.