Apply and extend previous understandings of arithmetic to algebraic expressions. Identify when two expressions are equivalent (i.e., when the two expressions name the same number regardless of which value is substituted into them). For example, the expressions y + y + y and 3y are equivalent because they name the same number regardless of which number y stands for.
Resource we found that are aligned to this standard
A task requiring students to transform expressions using the distributive, commutative and associative properties to decide which expressions are equivalent.
This task requires students to determine the validity of several expressions representing the perimeter of a rectangle in different forms.
A set of 12+ questions created by Khan Academy's Justin Helps.