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Expressions and Formulas
- When evaluating an expression, follow the standard order of operations: first calculate exponents, then multiply and divide from left to right, then add and subtract from left to right. BUT: parentheses always override the standard rules. Always work within parentheses first.
- Review and understand the key terms: variable, expression, monomial, constant, coefficient, polynomial, term, like terms, binomial, trinomial.
Expressions and Formulas
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
- Intro
- Order of Operations
- Variable
- Algebraic Expression
- Term
- Example: Algebraic Expression
- Evaluate Inside Grouping Symbols
- Evaluate Powers
- Multiply/Divide Left to Right
- Add/Subtract Left to Right
- Monomials
- Polynomials
- Formulas
- Example 1: Evaluate the Algebraic Expression
- Example 2: Evaluate the Algebraic Expression
- Example 3: Area of a Triangle
- Example 4: Fahrenheit to Celsius

























Carleen Eaton
Grant Fraser




2 answers
Last reply by: Yolanda Britt
Sat May 18, 2013 5:29 PM
Post by javier mancha on August 23, 2011
do the exponents, get added as a degree ??
0 answers
Post by Robert Reynolds on October 20, 2011
Thanks to the designer of the Educator.com shirts!
0 answers
Post by ravi tummala on November 20, 2011
^ This Guy
3 answers
Last reply by: Jonathan Aguero
Fri Dec 7, 2012 3:00 PM
Post by Sheila Mckenzie on April 29, 2012
When you were converting degrees to celcius. Why did you inverse the fraction on both sides from 9 over 5 to 5 over 9. Is it because its a fraction and the rule is when your multiplying a fraction on both sides you inverse the numbers? Please advise.
0 answers
Post by ozgur kuzu on June 7, 2012
why some people can not stop posting unnecessary comments ? be more polite..
1 answer
Fri Jan 25, 2013 2:34 PM
Post by Joyce Andrews-McKinney on January 24 at 11:49:47 AM
I like E.com fairly well. I use this site as a guide to teach math to my home schooler. I am confused as to why this site teaches Algebra 11 BEFORE teaching Geometry when all other schools and programs teach Geometry then Algebra 11. Does it matter which follows Algebra 1? I really need a response. Thanks everyone.
0 answers
Post by Aniket Dhawan on May 5 at 06:36:32 PM
hi