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Multiplying Fractions to Make a Whole Number

Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make a whole number product.

Hint

Hint

How can you use equivalent fractions to find the answer?

Answer

Answer

6/2 * 1/3 = 1, 8/4 * 1/2 = 1, 2/4 * 6/3 = 1

Source: Owen Kaplinsky

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4 comments

  1. My students came up with more solutions:

    2/1 X 9/6 = 3
    4/1 X 6/3 = 8
    6/4 X 2/3 = 1
    3/2 X 6/9 = 1
    4/2 X 3/1 = 6
    3/6 X 4/2 = 1
    2/3 X 9/6 = 1
    4/8 X 6/3 = 1
    9/3 X 4/2 = 6

  2. I had 6/2 x 3/1 = 9. I got this by finding a number that times by something would be under ten. I first got 6/2 and that got me 3. Then i got 3 from 3/1. Lastly i multiplied 3 by 3 and got 9. I agree it was a challenging puzzle.

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