Calculation-Addition and Subtraction

These videos can be used to secure existing methods or move children on the next method once they are secure with the one they are currently on. They go from easiest to hardest. 

Addition is first-scroll down for subtraction

Addition using partioning from Benton Park on Vimeo.

Expanded to formal addition from Benton Park on Vimeo.

Addition with decimals from Benton Park on Vimeo.

Subtraction

Column Subtraction ( decomposition) from Benton Park on Vimeo.

Decomposition Involving Exchange from Benton Park on Vimeo.