Standard

CCSS.Math.Content.4.NF
Number and Operations--Fractions
CCSS.Math.Content.4.NF.B
Build fractions from unit fractions by applying and extending previous understandings of operations on whole numbers.
CCSS.Math.Content.4.NF.B.3
Understand a fraction a/b with a > 1 as a sum of fractions 1/b.
CCSS.Math.Content.4.NF.B.3d
Solve word problems involving addition and subtraction of fractions referring to the same whole and having like denominators, e.g., by using visual fraction models and equations to represent the problem.