Justify decompositions, e.g., by using a visual fraction model.
Decompose a fraction into a sum of fractions with the same denominator in more than one way.
Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.
Add and subtract mixed numbers with like denominators,
- by replacing each number with an equivalent fraction.
- by using the properties of operations.
- by using the relationship between addition and subtract
Solve word problems involving addition and subtraction of fractions referring to the same whole and having like denominators by using visual fraction models and equations to represent the problem.