Addition+&+subtraction

=Please view the videos to learn the different strategies that are being taught in class.=

=**Addition:**=

Adding with an open number line

This site has some great information: @http://mathcoachscorner.blogspot.com/2012/06/open-number-line-addition.html

media type="youtube" key="W6mhL_IHHT0" width="560" height="315"

Partial sums strategy: 2-digit - [|video] 3-digit - Helpful video

=Subtraction:=

Expanded form strategy [|helpful video 1] [|helpful video 2]

Open Number line: [|helpful video]

Missing Addend: [|video]