Adding Signed Numbers
Rules for Adding:
- When you add two numbers with the same signs,
- add the absolute values, and
- write the sum (the answer) with the sign of the numbers.
Examples:
(+5) + (+7) = +12
(-6) + (-8) = -14
(9) + (5) = 14
- When you add two numbers with different signs,
- subtract the absolute values, and
- write the difference (the answer) with the sign of the number having the larger absolute value.
Examples:
(+7) + (-9) = -2
(-12) + (+15) = +3
(-20) + 14 = -6
