Unit 4: Expressions 1.2

Evaluating Algebraic Expressions

100

x-(-2); x=-1

1

200

1+x - x ; x=144

1

300

13x; x=-4

-52

400

x/4 ; x=-12

-3

500

x+3-(-x); x=2

7

Fractions / YAY!

100

1/2 a + 3/5a

11/10 a = 1 1/10 a

200

2/9a+3-7/9a

-5/9a+3

300

1/3n-4+3/4n-4

13/12n-8

400

(5/8a - 1/2)+(1/2a - 1/2)

9/8a-1

500

(2/3x+5/9)-(1/2x+1/2)

1/6x+1/18

Simplify Algebraic Expressions

100

3(x-7)

3x - 21

200

-4(2x-1)

-8x+4

300

5x - 7y -9x - x +3

-5x -7y +3

400

2(2x - 1) + 3(x+2)

7x + 4

500

-(x -1) + (3x - 5)

3x - 4

PEMDAS: Algebraic

100

x(2-2); x=1896512

0

200

4 - 3x ; x=-2

10

300

6x - 7y ; x=-1, y=3

-27

400

3(x-1) + 3; x=4

12

500

-x ; x=-2

2

In Your Own Words

100

What does it mean to evaluate something?

To give a value to

200

What is an algebraic expression?

An expressions with at least one variable and at least one operation.

300

What is a like term?

Terms with the same variable raised to the same exponent

400

What is a coefficient?

The number that multiplies the variable.

500

What is a monomial?

A number, a variable, or any combination of the product of numbers/variables.