WME@Kimpton Middle
## Positive and Negative IntegersWe know integers are whole numbers. An integer can be positive, negative, or zero. A positive integer, such as +28 (or simply 28), represents an *increase*. On the number line it means*moving forward*to the right.A negative integer, such as −12 (negative 12) represents a *decrease*(the opposite of increase). On the number line it means*moving backward*to the left.
The quantity 10 and −10 are the same amount, except one is an increase
and If you take a number, positive or negative, and remove its sign
then you get the Please note that the symbols + and − serve double duty in mathematics.
They are used as Let's experiment with positive and negative integers to better understand them. Adding a positive number +7 + 5 = -7 + 5 = -3 + 5 = -5 + 5 = Adding a negative number-- *add a decrease*+7 + (-4) = -7 + (-4) = +3 + (-4) = -5 + (-4) = Subtracting a positive number-- *remove the amount*+7 - 5 = -7 - 5 = +5 - 5 = +3 - 5 = Subtracting a negative number-- *remove a decrease means increase*+7 - (-3) = -7 - (-3) = +5 - (-3) = -5 - (-3) =
## Absolute ValuesDEFINITION: The absolute value of an integer is the whole number without the sign. Thus, abs(19) is 19 and abs(-19) is 19. We also use the absolute value notation |-8| = 8. |

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