1. Students were asked to put math problems on the board from previous homework. The document then provides examples of expressions and teaches how to simplify them using order of operations and properties like the distributive property. Students are asked to simplify sample expressions involving variables. 2. The document reviews that expressions need to have "like terms" to be simplified, such as terms with the same variables. Students practice simplifying expressions with multiple variables and terms by combining like terms. 3. To conclude, students are instructed to write their name and ID number on raffle tickets and provide just the simplified answer, practicing the skills of defining a variable, writing an expression, simplifying it, and evaluating it.

1. Opener: If you were assigned a problem from homework last time
please put it up on the board.
1. 2. when x = 7
3. 4. when x = ‐3
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3. Section 2.4: Simplifying Expressions
Write an expression that results from the number trick
below.
Choose a number. Subtract 3. Double the result. Add 6.
Subtract your starting number.
Expression: _____________
Evaluate the expression for the following values:
x ‐1 0 1 2
What's the pattern?
Wouldn't it be nice if we didn't have to fill out a table to
decide what the pattern will be?
Take the expression from before: 2(x ‐ 3) + 6 ‐ x
We can simplify the expression...but we need to review a
property you probably learned about last year....the
Distributive Property.
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4. More Simplifying: Follow the Order of Operations!
Another number trick results in the expression:
We want to simplify this expression to see what the
relationship between the starting and ending numbers is.
What should we do first?
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5. More Simplifying: Sometimes there will be more than one variable in your
expression.
For example: 2x + 9y ‐ 7x ‐ 10y
We can't simplify unless the pieces are something called
like terms. What are like terms?
Simplify these problems.
1. 3(x + 2) + 5x 2. 2z + 7z ‐ z + 5
3. 3a + 4b + 5a + 6 4. 4(x ‐ 1) ‐ 3(x + 2)
5. 6.
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6. Math Raffle!!!! On each raffle ticket, please write your name AND ID #.
Do ALL of your work in your notes and put JUST your
answer on the ticket. (Only one answer per a ticket)
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7. Back to Modeling we go...
**Remember:
Define a variable...Write the expression... Simplify the Expression...Evaluate!!!
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