4.NF.3a:
Number And Operations - Fractions
Build Fractions From Unit Fractions By Applying And Extending Previous Understandings Of Operations On Whole Numbers.
Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.
4.OA.2:
Operations And Algebraic Thinking
Use The Four Operations With Whole Numbers To Solve Problems.
Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.
