PA.2.2. Computation and Estimation
2.2.1.A. Apply concepts of addition and subtraction to solve problems up to ten.
2.2.1.B. Demonstrate strategies for addition and subtraction in order to solve single- and double-digit addition and subtraction problems.
PA.2.8. Algebra and Functions
2.8.1.A. Use the concept of equality and concrete objects to demonstrate understanding of the commutative and associative properties.