Elementary Algebra Review Part 3

In this elementary algebra review, students will learn how to evaluate variable expressions by plugging in values and write phrases as a variable expression, equation, or inequality. They'll practice using order of operations and learn to be careful of common mistakes such as assuming that (x + y)^3 is the same as x^3 + y^3. By the end of the lesson, they'll be able to write algebraic expressions for phrases such as "5 times the number decreased by 4" and turn sentences into equations or inequalities using x to represent the unknown number.

Evaluating variable expressions by plugging in values, writing phrases as a variable expression, equation, or inequality

• How do you evaluate variable expressions with given values of variables?
• How do you evaluate (x + y)^3 when x = 2 and y = 3?
• How do you evaluate x^3 + y^3 when x = 2 and y = 3?
• Why does (x + y)^3 not equal x^3 + y^3?
• How do you write phrases as algebraic expressions or inequalities?
• Five times a number decreased by four is what variable expression?
• The quotient of a number and 5 is what variable expression?
• Five subtracted from twice a number is what variable expression?
• How do you translate sentences into equations or inequalities?
• Five times a number decreased by four is six makes what algebraic equation?
• The sum of a number and two is greater than seven makes what algebraic inequality?
• The difference of a number and five is thirteen makes what algebraic equation?