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# Exponents review

Review the basics of exponents and try some practice problems.

## Exponents and bases

Here's what an exponent and a base look like:
start color #11accd, 4, end color #11accd, start superscript, start color #e07d10, 3, end color #e07d10, end superscript
The small number written above and to the right of a number is called an start color #e07d10, start text, e, x, p, o, n, e, n, t, end text, end color #e07d10. The number underneath the exponent is called the start color #11accd, start text, b, a, s, e, end text, end color #11accd. In this example, the base is start color #11accd, 4, end color #11accd, and the exponent is start color #e07d10, 3, end color #e07d10.

## Evaluating exponents

An exponent tells us to multiply the base by itself that number of times.
In our example, start color #11accd, 4, end color #11accd, start superscript, start color #e07d10, 3, end color #e07d10, end superscript tells us to multiply the base of start color #11accd, 4, end color #11accd by itself start color #e07d10, 3, end color #e07d10 times:
\begin{aligned} \blueD4^\goldD3 &=\blueD4 \times \blueD4 \times \blueD4 \\\\ \phantom{\blueD4^\goldD3}&= 64 \end{aligned}

### What about when the exponent is a zero?

Any base with an exponent of zero is equal to 1.
For example, 7, start superscript, 0, end superscript, equals, 1.
Check out this video to see why.

## Practice

Problem 1
• Current
Evaluate.
9, squared, equals

Want to try more problems like this? Check out this exercise.