Instructional Video
Khan Academy

Khan Academy: Addition and Subtraction With Number Lines

2nd - 3rd Standards
Given a 2-digit addition or subtraction problem, video demonstrates how to decide which number line matches up with it. [1:56]
Instructional Video
Khan Academy

Khan Academy: Addition and Subtraction With Number Lines

1st - 3rd Standards
Watch as Sal figures out which number line matches up with a 2-digit addition or subtraction problem. [1:52]