SUBTRACTION: Example 2
- Rule 19:
- To subtract, the denominators must be equal. You
essentially following the same steps as in addition.
- Build each fraction so that both denominators are equal.
- Combine the numerators according to the operation of subtraction or additions.
- The denominators will be the denominator of the built-up fractions.
- Reduce the answer.
- Calculate .
- The answer is .
- The denominators are different, so you must build
each fraction to a form where they both have the same denominator. Since both 4 and 6 will divide evenly into 12, build both fractions to a denominator of 12.
can now be written
Combine the numerators: 9 - 2 = 7.
The answer is
This answer is already reduced, so you can skip step 4.
- Now prove to yourself with your calculator that your
answer is correct. Calculate 3 divided by 4, calculate 1 divided by 6, and combine the results. Now divide 7 by 12. Both answers should be the same. If you are correct, the answers are the same (equivalent) and you have successfully added two fractions.
If you would like to review another example, click on the word Example.
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