Unit 0 - Pre-Algebra

One Step Equations

100

x + 5 = 10

x = 5

200

15x = 45

x = 3

300

x/6 = 6

x = 36

400

5x = 2.5

x = .5

500

x/36 = 36

x = 1296

Multi-Step Equations

100

-2 + 2x = 20

x = 11

200

-4x - 10 = 34

x = -11

300

4 ( -4x + 4 ) = -64

x = 5

400

13 + (x/6) = 0 

x = -78

500

-7 ( -1 - 4x ) = 203

x = 7

Integers

100

(-9) + 13 = ?

4

200

-100 - (-100) = ?

0

300

Absolute value of 128.

128

400

(-18)(-20) = ? 

360

500

What is -20 divided by 40?

-20/40

It won't be a whole number.

-0.5 or -(1/2) 

Rational vs Irrational Numbers

100

Is 0.5 a rational or irrational number?

Rational

200

True or False. Irrational numbers can be written as a decimal and a fraction.

False. It cannot be written as a fraction.

300

Pi is represented as 3.141592... 

Is it rational or irrational?

Irrational

400

Decimals that terminate or repeat in a nice pattern are...

Rational

500

Rational and irrational numbers can BOTH be...

Possible Answers: 1) Written as a decimal.  2) Real numbers.

Vocabulary

100

In an equation, what is "x" called? 

Variable

200

What is the difference between an expression and an equation?

Possible answer: An equation is equal to something, an expression will not have an equal sign.

300

What is absolute value?

The distance a number is away from 0. It is always positive.

400

What is an example of a rational number?

(Any real number and/or a decimal that is a terminating or repeating).

-5, 0.678, -1.2, 1/5

500

The coefficient and variable have a secret _____ sign in between them. 

Multiplication