In expressions like and , the 5 and the 8 are bases. They tell what factor is multiplied repeatedly. For example, = , and .

In expressions like and , the numbers 3 and the 2 are called exponents. They tell how many times a number is used as a factor.

For example, = , and .

An integer is a type of number. All whole numbers and their opposites are integers. 

The labels on this number line show all the integers from -10 to 10.

Scientific notation is a way to write very large or very small numbers. They are written as a product. The first factor is a number greater than or equal to 1, but less than 10. The second factor is a power of 10.

• The number 425,000,000 in scientific notation is .
• The number 0.0000000000783 in scientific notation is .