3.1 Simplifying Algebraic Expressions CCSS 6.EE.2 a,b,c Write, read and evaluate expressions in which letters stand for numbers. Identify parts of an expression using terms (sum, term, product, factor, quotient, coefficient). Evaluate expressions.

Vocabulary Numerical Expression: a mathematical phrase that uses only numbers and operation symbols. Example: 3 + 5 – 2, 5(2), Algebraic Expression: a mathematical phrase that contains numbers, variables, and operation symbols. Example: 6y – 3n, , Variable: place holder for a number (i.e. symbols or letters that represent a number like x or y)

Terms: Parts of the expression separated by + or - signs COEFFICIENT: the number in front of a variable. Example: 6x coefficient CONSTANT TERM: A number standing on its own or without a variable. Example: 5x + 9 constant term

Identify Terms, Coefficients and Constants Identify the terms, coefficients and constants in each expression. Terms Coefficients Constants 1) 2) 3)

Evaluate Expressions Evaluate: if b = 25 if x = 64 and y = 27

Evaluate Expressions Evaluate: if a = 1/5 if x = 1/2