- 112 Views
- Uploaded on
- Presentation posted in: General

Evaluating Expressions

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Evaluating Expressions

Expressions

An expression is NOT an equation

because it DOES NOT have an equal

sign. There are 2 types of expressions.

- 5 + 84 Numerical
- 3x + 10 Algebraic

Notice there are no equal signs in these

Expression (so they are not equations!)

Evaluate means to find the value of an algebraic expression by substituting numbers in for variables. (Plug & Chug)

m = 2

8 + m ?

8 + 2

10

1) ab - c

3)

(3)(4) - 5

2(3) + 4 2

6 + 4 2

12 - 5

6 + 2 = 8

7

2) 2a(b - c)

4)

2(3)(4 - 5)

2(4 + 5)

2(3)(-1)

3

18

2(9)

-6

=

= 6

3

3

Substitution is when you substitute

numbers in for variables. (It’s the same as evaluating).

Example:x = 4

x + 12 + x = ?

Substitute the 4 in for x4 + 12 + 4

= 20

Math Quizes

Math Games