Addition & subtraction strategies to solve two-digit equations using an open number line.

Julia begins with a Number of the Day warm up activity, followed by practicing 2 and 3 addition and subtraction equations, with and without regrouping, using base 10 drawings, expanded from ...

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 ...