Math -

Addition and Subtraction

Number Sense and Numeration:

  • Addition and Subtraction Videos: Check these videos out if you'd like to see how some of the addition and subtraction methods are used.


202.MOV

How to solve an addition problem using decomposition and an open number line.

203.MOV

How to solve a subtraction problem using decomposition and an open number line.

204.MOV

How to subtract using an open number line and decomposition.

205.MOV

How to add up purchases using an open number line and decomposition.

206.MOV

How to find elapsed time using a number line.

207.MOV

How to solve a multi-step addition/subtraction problem by first modeling the problem using a parts-whole model.