Modeling Algebraic Expressions

Algebraic Expressions Review

7th grade review

Algebraic Expressions contain...

• numbers

• variables

• at least one operation

Poll

Which of the following is an example of an algebraic expression?

• 3 + 4

• -2x - 4

Multiple Choice

What is the difference between an expression and an equation?

• a variable

• an equal sign

Variables are...

• letters

• symbols

• represent an unknown amount

Open Ended

Give an example of a variable...

Coefficient

• the numerical factor of a multiplication expression that contains a variable

• 2x - 2 coefficient, x variable

Multiple Choice

What is the coefficient in the expression -3x?

• -3

• x

Define a variable

• choose a variable to represent an unknown quantity

Multiple Choice

Evaluate the expression for w = 2

2w

• 4

• 22

• -22

Multiple Choice

Evaluate the expression for y = 5

y + (-5)

• 0

• 10

• -5

Multiple Choice

Evaluate the expression for w = 2 and x = -3

x + w

• 1

• -1

• 5

Multiple Choice

Evaluate the expression for w = 2

-w

• -2

• 0

• 2

Multiple Choice

Evaluate the expression for x = -3

-(x) - 3

• -6

• 0

• 3

Poll

Rate yourself on how you feel about evaluating expressions.

• HELP ME!

• Maybe some more practice.

• I'm a genius!