New York State Learning Standards and Core Curriculum
NY-4.NF. Number & Operations – Fractions
Build fractions from unit fractions by applying and extending previous understandings of operations on whole numbers.
NY-4.NF.3. Understand a fraction a/b with a > 1 as a sum of fractions 1/b.
NY-4.NF.3a. Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.
NY-4.NF.4a. Understand a fraction ݑ/ΰݑ as a multiple of 1/ϰݑ.