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Lesson 5: Fractions with denominators of 10 and 100

# Adding fractions (denominators 10 & 100)

Sal adds 3/10+7/100 by finding a common denominator. Created by Sal Khan.

## Want to join the conversation?

• Why do choose to make these videos for khan academy?
• Because Sal wants to help people and teach math to the world with this free and awesome website. That's a pretty good reason.
• sal is awsome
• who is sal
(1 vote)
• who records the voice id like to know
• it is Sal
• why does my teacher make me watch the vids?
• I don't know because they are mean lol
(1 vote)
• but what if the numerator is bigger the denomanator? I mean like 16/10 + 6/100
• If your comparing numbers like 7/14 and 14/7 try multiplying the denominators into the same number, then multiply the numerator with the same amount that you multiplied for the denominator.For 7/14 you will get 28/28 and for 14/7 you will get 28/28.Then you see which numerator is bigger if none are then they are equivalent.
• hey whats the denominator again
• the one on the bottom.
• is that the only way you can add fractions or?