Addition of Signed Numbers

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Presentation transcript:

Addition of Signed Numbers

Adding Integers with the Same Sign: To add integers with the same sign, keep their common sign and add their absolute values. Review: Absolute value is the distance from zero to the number on the number line.

Review of Absolute Value:

Examples 4 + 6 = 10 (both numbers are positive so keep the positive sign and add the absolute values) -7 + -5 = -12 (both numbers are negative so keep the negative sign and add the absolute values)

Examples -9 + -15 = 6 + 39 = -7 + -65 =

Adding Integers with Different Signs: To add integers with different signs, keep the sign of the larger absolute value number and subtract the absolute values. -5 + 7 = 2 (notice that the absolute value of 7 is greater than the absolute value of 5, so the answer will be positive)

Examples 2 + (-3) = 74 + (-65) = -8 + 4 = -45 + 50 =

Examples -4 + (-5) = 9 + (-12) = 16 + 14 = -56 + (-45) =