Addition & subtraction strategies to solve two-digit equations using an open number line. In this lesson, students go over using different addition and subtraction strategies to solve two-digit ...

Mrs. McCartney talks addition with D.C.; practices hopping the numberline with Springling. Join Mrs. McCartney for an addition number talk with D.C.! Get your hopping skills ready so you can see our ...

Explains the concept of zero in mathematics, emphasizing its role as a number that represents the empty set. It illustrates how zero is used in addition and subtraction, showing that adding or ...