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### Course: Staging content lifeboat>Unit 14

Lesson 30: Adding and subtracting fractions with unlike denominators

# Adding and subtracting 3 fractions

Learn how to add and subtract fractions with unlike denominators. They watch the process of finding a common denominator, then practice adding and subtracting the fractions to solve the problems.

## Want to join the conversation?

• What do I do if I have three minuses?
• add a 1 under the three
• Why are the questions hard
• Cause they want you to struggle
• Why is some math so easy but some so hard?
• Because the so easy ones are starters, and the other ones that are so hard are the last ones.
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cool
• no that is not cool that is cold
(1 vote)
• hi I need help do you how to do this
• Find the LCM then change that to the LCD and then subtract, add, multiply, divide. ( LCM means least common multiple) (LCD means least common denominator)
• Guysss anyone have IbisPaint??