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The Virtual Textbook
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These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.
Surds
This file deals with simplifying, squaring, adding and subtracting numbers expressed in surd form. It also includes rationalising the denominator.
The file begins with a table showing the squares and square roots of integers between one and twelve. The next sheet gives examples of finding square factors when simplifying surds and this is followed by two sheets of examples using this technique. The fifth interactive sheet shows how to use factors to help simplify the product of two square roots. The next two sheets generate examples of squaring surds including those with brackets. The final three sheets deal with rationalising the denominator including when the denominator is in the form a+√b.
Note: This program was designed by be viewed on a screen with a resolution of 1024 x 768. Users may have to adjust the resolution of their screen for the pages to display as was originally intended. The program uses macros which need to be enabled on users’ machine.
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