Arizona's College and Career Ready Standards
AZ.4.NF. Number and Operations – Fractions (NF)
4.NF.B. Build fractions from unit fractions by applying and extending previous understanding of operations on whole numbers.
4.NF.B.3. Understand a fraction a/b with a > 1 as a sum of unit fractions (1/b).
4.NF.B.3.a. Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.
4.NF.B.4. Build fractions from unit fractions.
4.NF.B.4.a. Understand a fraction a/b as a multiple of a unit fraction 1/b. In general, a/b = a x 1/b.