What numbers are on the real number line?
Natural Numbers
Natural numbers are the numbers 1, 2, 3, 4, 5, etc.
Whole Numbers
Whole numbers are the numbers 0, 1, 2, 3, 4, 5, etc. They are the combination of zero and natural numbers.
Integers
Integers are the numbers -2, -1, 0, 1, 2, etc. They include positive numbers, negative numbers, and zero.
How about numbers between integers?
Rational Numbers
Rational numbers are the numbers that can be expressed as a ratio such as -1/6, 1/2, 3/51, etc.