Math K-Plus

Adding Numbers, Adding Positive Numbers, Adding Negative Numbers

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What Are The Rules For Adding Positive Numbers And Negative Numbers?


Adding Positive Numbers and Negative Numbers
Before we begin, here are some important tips:
  • Negative sign and subtraction sign are really the same thing.
  • Positive sign has no affect on negative numbers.
  • When subtracting two numbers, use the sign of the larger number for the answer.
  • Adding Positive Numbers:
    (a) 5 + 1 = +6 = 6

  • Adding Negative Numbers:
    (a) -5 + (-1) =
        -5 - 1 = -6


    (b) -5 + (-1) =
        -(5 + 1) =
        -(6) = -6


  • Adding Positive and Negative Numbers:
    (a) -6 + 14 =
        14 - 6 = 8


    (b) -6 + 14 =
        +(14 - 6) =
        +(8) = +8 = 8


    (c) 7 + (-11) =
        -(11 - 7) = -4


Here is more on how to use signed numbers: