SUBTRACTION: Example 1
- 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 2 and 3 will divide evenly into 6, build both fractions to a denominator of 6.
can now be written .
Combine the numerators: for the numerator in the answer.
3 - 2 = 1.
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 1 divided by 2, calculate 1 divided by 3, and combine the results. Now divide 1 by 6. Both answers should be the same. If you are correct, the answers are the same (equivalent) and you have successfully combine two fractions using subtraction.
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