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

Students go over addition and subtraction with regrouping using different strategies.

Learn activities for second grade math to prepare for school. Teach your children 2nd grade math skills like addition and subtraction.

A learning/teaching approach used base-ten blocks to embody the English named-value system of number words and digit cards to embody the positional base-ten system of numeration. Steps in addition and ...