Basic Arithmetic : Laws of Exponents

Study concepts, example questions & explanations for Basic Arithmetic

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Example Questions

Example Question #8 : Operations In Expressions

Simplify:

Possible Answers:

Correct answer:

Explanation:

When dividing terms with the same bases, remember to subtract the exponents.

Keep in mind that when there is a negative exponent in the numerator, putting that term in the denominator will make the exponent positive.

Example Question #1 : Laws Of Exponents

Evaluate

Possible Answers:

Correct answer:

Explanation:

We first need to apply the Exponent Rule to our two terms.

 and

 .

Then we do subtraction to obtain our final answer,

 .

Example Question #12 : Operations In Expressions

Simplify the following expression: 

Possible Answers:

Correct answer:

Explanation:

The correct answer is  due to the law of exponents. When solving this type of problem, it is easiest to focus on like terms (i.e. terms containing x or terms containing y).

 

First we can start by simplifying the 'x' terms. We start with  which is equivalent to . We then are left with .

 

Now we can simplify the 'y' terms as follows: .

 

Last, the 'z' terms can be simplified as follows: .

 

This leaves us with the final simplified answer of .

Example Question #13 : Operations In Expressions

Which of the following is equivalent to ?

Possible Answers:

Correct answer:

Explanation:

Since all of the answer choices look like , let's find  in  .

Then,

When you have an exponent being raised to an exponent, multiply the exponents together.

Example Question #14 : Operations In Expressions

What is ?

Possible Answers:

Correct answer:

Explanation:

When terms with the same base are multiplied, multiply the coefficients together then add up all the exponents.

 

For the coefficients: 

For the exponents: 

Thus, the answer is 

Example Question #2 : Laws Of Exponents

Possible Answers:

Correct answer:

Explanation:

Start by simplifying the numerator. 

When an exponent is raised to another exponent, multiply the two exponents together.

Now, tackle the denominator. When two numbers of the same base are multiplied, you want to add the exponents.

Put the numerator and denominator together:

When you have a fraction with terms that have the same base, you want to subtract the exponent in the denominator from the exponent in the numerator.

To make a term with a negative exponent in the numerator positive, put it in the denominator.

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