Exponents

You will need to understand how to work with exponents for the GED math test. Exponents look like this:

In the number above, the three is the exponent. It is smaller than a regular number and floats to the upper right side of the number it modifies.

The way you would say 9³ is “nine to the power of three” or “nine to the third power.” You could also say “nine cubed,” since cubed is the special way to refer to the exponent of three. The exponent 2 also has a special way to refer to it: squared. 9² is nine to the power of two or nine squared. However all the other exponents are simply “to the power of (whatever exponent)”.

What is the value of 9³? The way to find the value of a number with an exponent is to multiply a number by itself the number of times of its exponent. So 9³ is 9 times itself (9) three times, since three is the exponent.

9 x 9 x 9

9³ = 729

Let’s do one more example.

Four to the power of six.

4 x 4 x 4 x 4 x 4 x 4

Four to the sixth power = 4096

If you are on the part of the test where you have access to a calculator, you can just use the exponent button. For example, if you need to find

just push 4 then the exponent button

then 6.

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11 comments

  1. Dane says:

    Typo on page 9 cubed is not 179

  2. Miranda Kistler says:

    Hey okay so this will be my first time taking my GED test.However, i am very concerned on if i will pass it or not math is they only subject i am having problems with. In spite of, that i am very scared that the first time i take it i will not pass and i am in desperate need to do so on the first try because i am going to be going to schol for my stna in nursing. PLEASE help me and tell me what i can do to prep for this test asap i have to take it within a month or two.

  3. Tammy says:

    I’m Having a unusual problem .I can really get algebra, geometry and trig but I can’t get the basic math like percents and decimals .I have to have a sample of it so I can remember them.What can I do ?

  4. Ashley says:

    I finally got it after 20 years

  5. J says:

    Congratulations Ashley!!!

  6. Amber says:

    I really need help w/ my GED.I didn’t finish high school so now im setting a goal to get my GED test. I hope someone could help as in showing me more examples so I could study for me GED test.

    -Thank you

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