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Subtract six and one-half minus four and seven-tenths. Justify your steps.

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    6 1/2 - 4 7/10

    When we subtract fractions, we must use a common denominator.

    6 1/2 = 6 5/10

    6 5/10 - 4 7/10

    Now we need to borrow (or regroup).

    6 5/10 = 5 15/10

    5 15/10 - 4 7/10 = 1 8/10 = 1 4/5

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