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### Course: Algebra basics>Unit 1

Lesson 6: Fractions

# Adding fractions word problem: paint

Learn how to add and subtract fractions with unlike denominators through a real-world problem. Watch as the problem is broken down step-by-step, practice finding common denominators, and apply this knowledge to determine if the sum or difference of the fractions meets a specific requirement. Created by Sal Khan.

## Want to join the conversation?

• you are confusing me about splitting the bar graph
• Splitting the bar graph really isn't at all confusing.It means that you divide something into fractions so you can understand better.The best object to use is a bar graph.Sal divided the first two into different fractions.Then, when you converted the two into fractions with same denominators,you add them together.When you add it,you get the answer,which Sal demonstrated in the third bar graph. So it is not confusing at all.Thanks for reading this reply!
• question when looking for a common denominator
must it be the lowest you can find or can it be just any?
(1 vote)
• A common denominator cannot be "any" number, because it has to fit both fractions. However, it can be "any" fitting number. The reason you want it to be a smaller number is that it makes adding and simplifying easier. (see simplifying fractions) I hope this helped!
• This is very good and has helped me a lot on math.....

I bet this comment cant get 10 upvotes
• thank u for helping me i think ima get a 100
• Hope you do
(1 vote)
• feel like he could have explained this way more simpler

Upvote if u agree
• if you are confused in this vid comment
• how dose the paint bucket help again?