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5 January, 09:51

Melissa has a rope that is 84 feet long. she is cutting it into 7-foot pieces to make a ropes. How many jump ropes can she make?

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  1. 5 January, 10:22
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    So,

    Melissa's rope is 84ft. long.

    Each piece must be 7ft. long.

    We divide the length of the rope by the required length of each piece.

    Now we have a fraction: 84/7

    Prime Factorization

    Prime factored form of 84: 2*2*3*7

    Prime factored form of 7: 7

    Cross out 7's

    2*2*3/1 or 12/1 or 12

    Melissa can make 12 ropes.
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