Bell Ringer Activity Monday, August 29, 2011 You will notice a word or a definition on your desk. You will notice a word or a definition on your desk. Walk around and find the match on a different desk. Walk around and find the match on a different desk. When you find it, make a note of the desk number that matches your word or definition. When you find it, make a note of the desk number that matches your word or definition.

Evaluating Expressions

Variables In math we use symbols to represents numbers that we do not know. In math we use symbols to represents numbers that we do not know. Symbols are usually letters such as x or y Symbols are usually letters such as x or y What does the word variable sound like to you? What does the word variable sound like to you?

Term What does the word term mean to you? What does the word term mean to you? Where have you seen this word in other subjects? Where have you seen this word in other subjects? Ex: English – a single word that can be defined Ex: English – a single word that can be defined How might we model this in mathematics? How might we model this in mathematics? A single number, letter, or combination of both. A single number, letter, or combination of both. Ex: 6, 5, x, z, 6y, 5x, 4z Ex: 6, 5, x, z, 6y, 5x, 4z

Expressions What does the word expression mean? What does the word expression mean? A single number, letter, term or the product of those separated by a + or -. A single number, letter, term or the product of those separated by a + or -. Discuss what an algebraic expression might look like. Discuss what an algebraic expression might look like. Examples: Examples: 6n, 52x, 5y 6n, 52x, 5y 6+n, x-5, x-y 6+n, x-5, x-y Are there times when an expression can also be a term? Are there times when an expression can also be a term?

Evaluate What does evaluate mean? What does evaluate mean? What are some non-math examples of evaluating? What are some non-math examples of evaluating? How might we evaluate a math problem? How might we evaluate a math problem? Substitute a specific value for each variable and then perform the operation. Substitute a specific value for each variable and then perform the operation.

Powers and Exponents expressions.htm#values expressions.htm#values expressions.htm#values expressions.htm#values Practice problem #3 Practice problem #3 Practice problem #4 (also order of operations) Practice problem #4 (also order of operations) Question 5 and 6 Question 5 and 6 Practice problem # 5 (substitution) Practice problem # 5 (substitution)

More Practice Animated Math: Classzone (Order of Operations) Notetaking Guide Page 3 & 4?

Ending Activity Monday, August 29, 2011 In your quadrant: In your quadrant: Write 3 different expression that result in a value of 12 Write 3 different expression that result in a value of 12 You may use constant terms, variable terms with substitution or powers (try all 3) You may use constant terms, variable terms with substitution or powers (try all 3)