The Math Forum

Ask Dr. Math

Adding/Subtracting Fractions

Dr. Math Home || Elementary || Middle School || High School || College || Dr. Math FAQ

Adding and Subtracting Fractions, a selection of answers from the Dr. Math archives.

Adding Fractions
Sally ate 1/8 of a cake and her sister ate 3/8 of it. What fraction did they eat together? A beginning fraction problem with an illustrative diagram.

Adding Fractions
3/4 + 1/6. I don't understand how they get 9 and 2 for numerators. A diagram and an explanation.

Adding, Subtracting, Multiplying, Dividing Fractions
Lower-term fractions: a basic explanation.

Adding and Subtracting Fractions
An explanation using money.

Adding and Subtracting Fractions
Why don't we add or subtract the denominators? An apple-and-orange explanation.

Adding Fractions
How do you add fractions? The common denominator and the distributive property.

Subtracting Fractions
The basics, and finding a common denominator.

Subtracting Fractions with Borrowing
When you are subtracting a fraction, do you always take one away from the whole number? An explanation using clock time.

Return to
Elementary Fractions and Decimals
Index of Selected Answers to Common Questions

[Privacy Policy] [Terms of Use]

Home || The Math Library || Quick Reference || Search || Help 

© 1994- The Math Forum at NCTM. All rights reserved.