South Dakota Content Standards
4.NF. Number and Operations—Fractions
4.NF.B. Build fractions from unit fractions by applying and extending previous understandings of operations on whole numbers.
4.NF.B.3. Understand a fraction a/b with a > 1 as a sum of fractions 1/b. For example, 4/5 = 1/5 + 1/5 + 1/5 + 1/5
4.NF.B.3.a. Add and subtract of fractions e.g., joining and separating parts referring to the same whole.
4.NF.B.4. Apply and extend previous understandings of multiplication to multiply a fraction by a whole number.
4.NF.B.4.a. Understand a fraction a/b as a multiple of 1/b. For example, use a visual fraction model to represent 5/4 as the product 5 x (1/4), recording the conclusion by the equation 5/4 = 5 x (1/4).