math

How do two fractions have a sum of exactly 1

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asked by Matt
  1. well, easy
    think of some
    1/2 + 1/2 = 2/2 = 1
    1/3 + 2/3 = 3/3 = 1
    sum of tops must equal denominator when denominators are the same
    that means you need to put them over a common denominator, but you have to do that to add them anyway.

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    posted by Damon
  2. 1 pizza

    Cut into two equal pieces and you have 1/2 + 1/2 = 1

    Cut into three equal pieces and you have 1/3 + 1/3 + 1/3 = 1

    Cut it into two unequal pieces, you may have 1/4 + 3/4 = 1

  3. Thanks Damon, Is there an easy way to explain it to a third grader?

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    posted by Matt
  4. I suggest you demonstrate with a pizza or with a cookie or even a piece of paper.

  5. THANKS Ms.Sue

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    posted by Matt
  6. You're welcome, Matt.

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