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A scarf is knitted at a rate of 3/7 inch per half hour. How much length is added to the scarf in a 6 hour period?

This needs a set up for a 3rd grader just starting with fractions. I showed her this:

3/7 inch in a half hour, so 6/7 of an inch in an hour. So, 6/7 x 6 = 36/7 inches added

(Kate's teacher said that her answer of '18/7 hours' was correct. Help!?!

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Kate's question
1 answer

  1. You are correct at 36/7

    another way to look at it:
    there are 12 half-hours in 6 hours. Have Katie look at a clock.

    So the length is 12*(6/7) = 36/7 inches

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    Reiny

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