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Thread: Subtracting Integers - Need Help Solving these problems

  1. #1

    Subtracting Integers - Need Help Solving these problems

    Question on his homework:

    Match the subtraction expression with the equivalent addition expression.

    #3. -7-7 #4. 7-(-3) #5 -7-(-3) #6. 7-3

    A. -7 +3 B. 7 +(-3) C. -7 + (-3) D 7 + 3

  2. #2
    Elite Member mmm4444bot's Avatar
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    The operation of subtraction is the same as "adding the opposite".

    In other words, subtracting a positive number from something is the same as adding its negative.

    EGs:

    10 - 4 is the same as 10 + (-4)

    3 - 1 is the same as 3 + (-1)

    Likewise, subtracting a negative number from something is the same as adding its positive.

    EGs:

    10 - (-4) is the same as 10 + 4

    3 - (-1) is the same as 3 + 1

    Therefore, to rewrite subtraction as addition, we must change the sign of the number.

    If you're still unsure how this works, please let us know.

    Cheers ~ Mark

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