# Elementary Algebra Review Part 3

Taught by YourMathGal
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Lesson Summary:

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.

Lesson Description:

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

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

• 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?
• #### Staff Review

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More problems evaluating variable expressions are explained in this lesson. A concept that can be very difficult for students - translating from words to variable expressions, equations, and inequalities - is also discussed. This is a great tutorial for learning to translate a sentence into variables and numbers.