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Suppose you had the sum 3/4+1/8-5/6. First - make the fractions all the same... 3/4 = 6/8, so 6/8+1/8=7/8.

Next, you want to subtract 5/6. Again - make everything have the same denominator, so... 7/8 (from the previous sum) equals 21/24, and 5/6=20/24.

This gives you the final sum 21/24-20/24=1/24

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Q: How do you add two fractions together then subtract another?
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