Add/Subtract Fractions: Proof
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Transcript
A fraction A over B times B equals A. An equivalent fraction: A over B equals A times C over B times C. A reciprocal: B times one over B equals one. The distributive law: A plus B times C
equals A times C plus B times C. A fraction A over B equals A times one over B. One fifth plus two fifths equals one plus two over five, equals three fifths. One fifth. Two fifths. Three fifths.
Transcript generated from the lesson narration.
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