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If you put four 9-inch square boards together to make a bigger square, what would be the area of the new larger board in square feet?

  • math -

    How many boards are you using?

    4 boards = 18 inches * 18 inches

    144 square inches = 1 square foot.

    9 boards = (27 * 27) square inches.

    16 boards = ?

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