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13 September, 09:17

In subtracting fractions with regrouping. What is 7 - 3 1/2?

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  1. 13 September, 10:15
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    7/2

    Step-by-step explanation:

    Step 1: Convert the mixed fraction to an improper fraction

    3 1/2 is 7/2 (multiply the denominator by the whole number,

    then add the numerator, leave that new number

    over the original denominator)

    Now our expression is 7 - 7/2

    Step 2: Find a common denominator

    The common denominator is 2, so multiply 7 by 2/2

    7 (2/2) - 7/2

    14/2 - 7/2 (14/2 = 7, but now we can combine fractions)

    Step 3: Add or subtract numerators, here it's subtraction

    14/2 - 7/2 = (14 - 7) / 2 = 7/2
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