6th grade

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What steps do we use to change 1-1/2 cups in half?

  • 6th grade -

    3/2 divided by 2 = 3/2 * 1/2 = ??

  • 6th grade -

    Change 1 1/2 to an improper fraction.

    Multiply.

    (1/2) * (3/2) = 3/4

  • 6th grade -

    I was told that when dividing a mixed number you write the reciprocal of the second number and then multiply and that will change the answer.

  • 6th grade -

    You only use the reciprocal when the original problem is a division problem.

    Your problem is a straight multiplication problem.

  • 6th grade -

    Isn't this a division problem? I have to divide 1-1/2 into two parts.

  • 6th grade -

    It's the same thing.

    (3/2) / 2 = (3/2) * (1/2)

    The simpler way is to remember that "of" in a math problem means to multiply.

    (3/2) * (1/2) = 3/4

  • 6th grade -

    Thank you very much for your help. I had the same answer. I'm trying to explain the reciprocal to my daughter, she is worried that her teacher will say the answer is wrong.

  • 6th grade -

    You're very welcome.

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