Unit 1 The Number System

What is the absolute value of 0?

0

What is the absolute value of 2?

2

What is the absolute value of -5?

5

Irrational Number

A number that cannot be written as a fraction

Rational Number

Any number that can be written as a fraction

Integer

Any positive or negative whole number including zero

Is 0 positive or negative?

Neither! It makes the number line symmetrical. If you have zero dollars, you don't have any money and you don't owe any money.

Is pi an integer?

No, pi is a non-terminating decimal (meaning the decimal continues on without a pattern)

absolute value

The distance a number is from zero on a number line

Is 0 an integer?

Yes, zero is an integer