Two parts and one total - addition and subtraction (1st grade math)

We solve word problems and missing number problems that have to do with two parts (or three parts in some instances) and a given total. We can write a missing-number addition equation, or a subtraction equation, for these situations. Math Mammoth Grade 1 Curriculum https://www.mathmammoth.com/complete/... Practice the connection between addition and subtraction online: https://www.mathmammoth.com/practice/...