This is aligned with the following California State Standards:
Combine two or more sets of objects to form a new set. Compare two or more sets containing objects to communicate whether a set has the same, different, or an equal number of objects than the other set.
Represent addition or subtraction word problems or models with equations (e.g., 8 marbles + 3 marbles = 11 marbles). Recognize that the unknown quantity in an equation is represented using a symbol or letter (e.g., 5 + b = 8).
Apply commutative (e.g., 3 + 4 = 4 + 3) and associative [e.g., 2 + (3 + 5) = (2 + 3) + 5] properties of addition to add two or more numbers. Evaluate an equation to be true or false by determining whether the numerical value on both sides of an equation is the same or different (e.g., analyze whether 5 + 7 = 8 + 4).
Create equivalent expressions by applying commutative and associative properties of addition (e.g., the expression 5 + 8 is equal to 8 + 5 due to the commutative property of addition).
Recognize or generate an equivalent expression involving addition or subtraction operations using commutative and associative properties of addition and multiplication [e.g., recognize that the expression (8 + 6) x 5 is equivalent to 5 x (6 + 8)].