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Adding, subtracting, multiplying, and dividing fractions
Learn step-by-step with practice exercises built right in.
Same denominator: Add or subtract numerators, keep denominator
Calculate:
Avoid these 3 frequent errors
See how this math is used in the real world
Solve .
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Example:
Different denominators: Find common denominator first!
Example:
LCD = 12:
Multiply numerators, multiply denominators
Example:
Tip: Simplify before multiplying when possible!
Multiply by the reciprocal
Example:
Memory aid: "Keep, Change, Flip"
Divide numerator and denominator by their GCF:
Same denominator: add numerators, keep denominator.
Simplify:
Answer:
Calculate:
Multiply numerators and denominators:
Calculate:
Keep, Change, Flip: Multiply by the reciprocal
Simplify (divide by 2):
Answer:
Multiply:
Convert to mixed number:
Answer: or