1.OA.B
Understand and apply properties of operations and the relationship between addition and subtraction.
Standards
1.OA.B.3
Apply properties of operations as strategies to add and subtract.Students need not use formal...
1.OA.B.4
Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding...
Tasks aligned to this cluster
Fact Families
Fact Families with Pictures