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### Unit 6: Lesson 2

Whole numbers & integers

# Whole numbers & integers

Walk through the difference between whole numbers & integers. For example, is the number -8 a whole number? Is it an integer?
First we'll learn about whole numbers, then we'll learn about integers, and we'll finish by thinking about whole numbers and integers at the same time.

## Whole numbers

Whole numbers are the numbers starting at 0 and counting up forever:
left brace, 0, comma, 1, comma, 2, comma, 3, comma, 4, comma, 5, comma, 6, comma, 7, comma, 8, comma, 9, comma, 10, comma, 11, point, point, point, right brace
Key idea: Whole numbers don't include negative numbers, fractions, or decimals.
Is 8 a whole number?

Is 9749 a whole number?

Is minus, 5 a whole number?

Is 9, point, 5 a whole number?

Is start fraction, 5, divided by, 7, end fraction a whole number?

Sweet, let's move onto integers.

## Integers

Integers are just like whole numbers, but they also include negative numbers:
left brace, point, point, point, minus, 5, comma, minus, 4, comma, minus, 3, comma, minus, 2, comma, minus, 1, comma, 0, comma, 1, comma, 2, comma, 3, comma, 4, comma, 5, point, point, point, right brace
Key idea: Like whole numbers, integers don't include fractions or decimals.
Is start fraction, 1, divided by, 3, end fraction an integer?

Is 7 an integer?

Is minus, 9 an integer?

Is 8, point, 6 an integer?

Is minus, 8, point, 6 an integer?

Is minus, 947 an integer?

Is minus, start fraction, 1, divided by, 3, end fraction an integer?

Great, now that we've learned both whole numbers and integers, we're ready to classify numbers.

## Classifying numbers

What type of number is minus, 3?

What type of number is 5, point, 1?