Unit 1 The Number System
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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
