Open Number Lines 4 | 2nd Grade Math. Special | 28m 56s Video has Closed Captions | CC. Addition & subtraction strategies to solve two-digit equations using an open number line.

Springling is a Math Might that lives in Mathville and Springling has fluffy eyelashes and long hair and a tail that looks like a spring. Springling likes to hop on the number line in friendly chunks.