Introducing Integers
Integers include all whole numbers and their opposites — positive numbers, zero, and negative numbers. We see negative numbers in temperatures and sea depths.
What You Need to Know
Key Concept Diagram
Positive integers are whole numbers greater than zero
Negative integers are less than zero and have a minus sign
Zero is neither positive nor negative
On a number line, numbers increase from left to right
Key Vocabulary
Integer
A whole number — positive, negative, or zero
Positive
Greater than zero; to the right of zero on a number line
Negative
Less than zero; to the left of zero on a number line, shown with a − sign
Opposite
Two numbers the same distance from zero on a number line, e.g. +3 and −3
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
Which temperature is coldest?
Question 2
What is the opposite of −7?
Question 3
Which list is in order from least to greatest?
Key Concepts Summary
- ●Positive integers are whole numbers greater than zero
- ●Negative integers are less than zero and have a minus sign
- ●Zero is neither positive nor negative
- ●On a number line, numbers increase from left to right