Number and Operations- Fractions
* develop understanding of fractions as numbers

* extend understanding of fraction equivalence and ordering, build fractions from unit fractions by applying and extending previous understandings of operations on whole numbers, and understand decimal notation for fractions

* use equivalent fractions as a strategy to add and subtract fractions, apply and extend previous understandings of multiplication and division to multiply and divide fractions, and represent and solve problems involving addition and subtraction