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 ...

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 ...

This is a preview. Log in through your library . Abstract A learning/teaching approach used base-ten blocks to embody the English named-value system of number words and digit cards to embody the ...