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Squares, roots and powers

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From paving your patio to measuring the ingredients for your latest recipe, squares, roots and powers really are part of everyday life. This free course reviews the basics of all three and also describes scientific notation, which is a convenient way of writing or displaying large numbers.

After studying this course you should be able to:

  • evaluate the squares, cubes and other powers of positive and negative numbers with or without your calculator
  • estimate square roots and calculate them using your calculator
  • describe the power notation for expressing numbers
  • use your calculator to find powers of numbers
  • multiply and divide powers of the same number
  • understand and apply negative powers, the power 0 and the power 1 for any number
  • express any given number in scientific notation
  • convert a number from scientific notation to conventional decimal form
  • use scientific notation and the rules of powers to find estimates for calculations
  • read results displayed in scientific notation on your calculator.

By: The Open University

  • Duration 5 hours
  • Updated Wednesday 29th April 2015
  • Introductory level
  • Posted under Mathematics Education
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Enrol to access the full course, get recognition for the skills you learn, track your progress and on completion gain a statement of participation to demonstrate your learning to others. Make your learning visible!

Squares, roots and powers

Introduction

Unit image

This free course, Squares, roots and powers, reminds you about powers of numbers, such as squares and square roots. In particular, powers of 10 are used to express large and small numbers in a convenient form, known as scientific notation, which is used by scientific calculators.

Enrol to get a record of achievement

By enrolling on this course and setting up a free Open University account you can track your progress in My OpenLearn. When you’ve finished you can print off the free activity record to demonstrate your learning. 

This OpenLearn course provides a sample of Level 1 study in Mathematics & Statistics [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] .

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