CCSS 4.NF.3C (Common Core, 4th Grade): "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." The worksheets below practice this standard. Each one is a free printable PDF with an answer key, comes in multiple versions, and can also be assigned digitally - no login or account needed.
Number and Operations—Fractions Build fractions from unit fractions by applying and extending previous understandings of operations on whole numbers.3Understand a fraction a/b with a > 1 as a sum of fractions 1/b.cAdd 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.
