Common Denominators - Add Subtract

adding fractions and subtracting fractions

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When fractions have the same denominator, adding fractions is easy! Just add the numerators.
Slide: 2
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When the denominators are different, it is much trickier!
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Re-name-inator
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We just have to rename the fractions before we can do anything with them! You shall become re-name-inators!
Slide: 4
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Once you rename the fractions so they all have the same denominators, adding and subtracting fractions is easy again.