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Grade 6 - Expressions & Equations
Standard 6.EE.A.4 - Practice simplifying variable expressions by adding and subtracting like terms.
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..