Transum Software

Estimate Powers and Roots

Estimate the powers and roots of the given positive numbers.

\( 1 \)

\( 2 \)

\( 3 \)

\( 4 \)

\( 5 \)

\( 6 \)

\( 7 \)

\( 8 \)

\( 9 \)

\( 10 \)

\( 11 \)

\( 12 \)

Help with roots Help with powers

Instructions

Try your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help.

When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file.

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This web site contains over a thousand free mathematical activities for teachers and pupils. Click here to go to the main page which links to all of the resources available.

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Teachers

If you found this activity useful don't forget to record it in your scheme of work or learning management system. The short URL, ready to be copied and pasted, is as follows:

Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments.

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Mental Methods

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Did you know that there is a quick way of squaring a two digit number which ends in .5?

Just multiply the first digit by that digit plus one then add a 0.25 to the result.

For example What is 8.5 squared?

8 x 9 + 0.25 = 72.25.

 

Here are some other tips and tricks from the Mathforum website:

You may also want to use a calculator to check your working. See Calculator Workout skill 6.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

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Example

This video is from Khan Academy.

You may also want to use a calculator to check your working. See Calculator Workout skill 5.

Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly. You can double-click the 'Check' button to make it float at the bottom of your screen.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

Log in Sign up

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