This video shows how to add, subtract, and simplify fractions using a pie graph and an infinite blackboard. Once he has established the rule, Sal throws the viewer a curve ball with a fraction subtraction problem that results in a negative number.

Concepts

adding fractions, common denominators, fractions, fractions unlike denominators, subtracting fractions, subtraction

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Additional Tags

adding fractions, common denominators, subtracting fractions, different denominators, math

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Classroom Considerations

• This video is hosted on YouTube