We have been learning about how to use an open number line to solve addition problems. Interested in learning more about how an open number works? Click the link below to see a video about how to use an open number line to solve an addition problem.
https://drive.google.com/file/d/0B8wDzKO4E2Whc3lQVS1kTi1Ybmc/view?usp=sharing
https://drive.google.com/file/d/0B8wDzKO4E2Whc3lQVS1kTi1Ybmc/view?usp=sharing