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11 February, 03:23

800-675, why do we borrow?

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Answers (2)
  1. 11 February, 03:37
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    The reason why we borrow is because you cant subtract 0 from 5
  2. 11 February, 03:51
    0
    When doing vertical subtraction, 800 - 675 will turn out like this:

    800

    - 675

    You should know that we start on the right and then end on the left.

    So, we do 0 - 5, 0 - 7, then 8 - 6, right?

    No. We have to borrow because you can't have a negative number when doing each number individually, only until the end. In this case, there won't be any negative numbers.

    You can't do 0 - 5 or 0 - 7, so you have to borrow, changing the number to the left of it one lower (unless it's 0, so then you must borrow the the next number after that).
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