Lesson 1: Whole Numbers and Basic Operations

What is an integer?

An integer is any whole number, including negative numbers and zero.

Examples of integers

-3, -1, 0, 5, 100.

What is a negative number?

A negative number is any number less than zero.

How do you know if a number is more negative?

Numbers become more negative as they move farther from zero.

What is addition?

Combining two or more numbers to make a larger number.

What is subtraction?

Taking away one number from another.

How do you use a number line for addition?

Start at the first number and move to the right for addition.

How do you use a number line for subtraction?

Start at the first number and move to the left for subtraction.

Adding a negative number = ?

Subtracting.

Subtracting a negative number = ?

Adding.

What happens to two negative signs next to each other?

They turn into a plus (+) sign.

What should you do for word problems?

Identify the question, choose the correct operation, and calculate step by step.