Pre-Algebra Review

Equations

100

Solve for x: x + 15 = 85

70

200

Solve for x: x - 15 = -15

0

300

Solve for x: x - 23 = -65

-42

400

Solve for x: -3x - 26 = 160

-62

500

Solve for x: 5x - 14 = 3x + 20

17

Simplifying Expressions

100

5² + 1

26

200

2x + 3x - 4x

x or 1x

300

20 - 4x - 5 + 6x = ?

15 + 2x or 2x +15 

400

-2³ + 1

-7

500

A model car is made to a scale of 2 to 10. If the model is 15 inches long, how long, in inches, is the actual car?

15 times 5 = 75 

Integers and Fractions

100

solve -5 cubed

-125

200

1/3 times 3/4

3/12

Multiply across the top and across the bottom

300

1/2 + 1/4

3/4

Need to make common denominators

400

Which is bigger, -5 or -1

-1

500

Which is bigger,  -1/2 or -3/4

-1/2

Distributive Property

100

Find the mean/average: 84, 80, 82

82

200

Simplify by using the distributive property:

3(x + 1)

3x + 3

300

Simplify by using the distributive property:

4(2x - 3)

8x - 12

400

Simplify by using the distributive property:

-2(4x + 2)

-8x - 4

500

Simplify by using the distributive property:

-3(5x - 2)

-15x + 6

Fractions and Percents

100

Find 50% of 200.

100

200

Find 50% of 250.

125

300

Find 25% of 20

5

400

25% is equivalent to what fraction? (in simplest form)

1/4

500

1/4 + 1/4 = ?

2/4 or 1/2