Rules
When you add two positives you (sometimes/always/never) get a positive sum.
always
(-4) + (+8) =
4
(-1) - (-1)
0
(-1) x (-25) =
25
(-21) / (-7) =
3
When you add two negatives you (sometimes/always/never) get a positive sum.
never
(-12) + (-12) =
-24
(-20) - (+10)
-30
(-25) x (+2) =
-50
(-144) / (-12) =
12
When you multiply two integers with the same sign you (sometimes/always/never) get a negative product.
never
(-50) + (-75) =
-125
(-45) - (-15) =
-30
(+7) x (+9) =
63
(-12) / (+2) =
-6
When you divide by two integers with different signs you (sometimes/always/never) get a negative product.
always
(-100) + (+25) =
-75
(-224) - (-25) =
- 199
(+9) x (-8) =
-72
(-56) / (+8) =
-7
You call both positive and negative whole numbers this.
integers
(-401) + (+400)
-1
(-5012) - (-28)
-4984
(-125) x (+5) =
- 625
(-625) / (+25) =
-25