| © 2006 Rasmus ehf og Jóhann Ísak Pétursson |
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Lesson 1
Let’s look at some examples:
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Example 1 |
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First a simple multiplication. We put both fractions over the same division
line and cancel out the common factor. |
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Example
2 |
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When we divide by a fraction we
turn the dividing fraction round and change the division into a
multiplication. If there are no common factors to cancel out we multiply
the numerators together and the denominators together. |
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Example
3 |
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When we divide a
fraction by another fraction we change the dividing line into a division
sign. Now we can continue in the same way as in example 2. |
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Example
4 |
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First we add together the fractions in the numerator. |
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Now we have a fraction in both the numerator and denominator and can
continue as in the previous example. |
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Example
5 |
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First add
the
fractions in the numerator together .Next change the dividing line into a division sign and turn the dividing
fraction round so that we can change the division to a multiplication. |
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Now put the two fractions together over the same line and cancel out the
common factors. |
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Example
6 |
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First add the
fractions in the numerator together. |
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Next change the dividing line into a division sign. |
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Then turn the dividing fraction round so that we can change the division to a
multiplication. |
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Now put the two fractions together over the same line and cancel out the
common factors. |
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Try Quiz 1 on Fractions dividing fractions. Remember to use your Checklist.
