add (-9)+0+(-2)+12
add the like signs...
-11+12
1
-11 + 12 = ?
To add (-9) + 0 + (-2) + 12, you simply need to combine all the numbers together.
(-9) + 0 + (-2) + 12 = -9 + (-2) + 0 + 12
When dealing with negative numbers, you can think of adding a negative number as subtracting a positive number. In this case, (-9) + (-2) is equivalent to subtracting 9 from -2, which gives you -11.
-9 + (-2) + 0 + 12 = -11 + 0 + 12
Now, you can add the remaining numbers together:
-11 + 0 + 12 = 1
Therefore, (-9) + 0 + (-2) + 12 equals 1.