Common Core Alignment:.

4.NF.3c:

Number And Operations - Fractions

Build Fractions From Unit Fractions By Applying And Extending Previous Understandings Of Operations On Whole Numbers.

Add and subtract mixed numbers with like denominators, e.g., by replacing each mixed number with an equivalent fraction, and/or by using properties of operations and the relationship between addition and subtraction.

4.NF.3d:

Number And Operations - Fractions

Build Fractions From Unit Fractions By Applying And Extending Previous Understandings Of Operations On Whole Numbers.

Solve word problems involving addition and subtraction of fractions referring to the same whole and having like denominators, e.g., by using visual fraction models and equations to represent the problem.