If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Lesson 4: Adding and subtracting mixed numbers with unlike denominators

# Adding mixed numbers with regrouping

Learn how to add and subtract mixed numbers with unlike denominators. Watch the process of finding a common denominator, converting mixed numbers to improper fractions, and adding or subtracting these fractions.

## Want to join the conversation?

• Is not this the same as common denominators? good luck and good learning
• These are not same denominators, but In this video you try to get the same denominators in order to add or subtract. Good luck to you too!
• At couldn't you carry over like normal?
• You are correct you could. however, this lesson is called "Adding mixed numbers with regrouping", so the point is to learn this specific strategy
• how can we simplify all the fractions in this video?
• When adding and subtracting fractions why do we have to regroup? :]
(1 vote)
• Because it's similar to regular addition and subtraction
• If anyone needs, when making a equivalent fraction with a whole number, the whole number stays the same, for example. 2 3/2 + 4 3/2 LCM: 6 : 2 3/2 = 2 9/6= 3 3/6 4 3/2 = 4 9/6= 5 3/6. You only change the whole number if the fractions still are improper.
(1 vote)
• To turn a mixed number into an improper fraction, you would multiply the denominator by the whole number and then add the numerator. For instance, if you have the mixed number 4 1/2, you would multiply 2 by 4 and get eight, but then add the 1, leaving you with 9. The denominator stays the same, and your improper fraction would be 9/2.
(1 vote)
• At couldn't you carry over like normal?
(1 vote)
• Turn the mixed numbers to improper and add with common denominates.
(1 vote)
• Just try finding what to do you can also get the same denominator
(1 vote)
• this is really confusing can someone help me
(1 vote)