Posted by Marie on Tuesday, October 13, 2009 at 8:16pm.
You first have to find a common denominator for all three fractions.
Then, add the two positive fractions and subtract the negative fraction.
Example:
1/2 - 3/4 + 5/6 = 6/12 - 9/12 + 10/12 = 7/12
ex; 6o/10 = 30/5
20/40=10/20
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