how to subtract negative number?
the may not be a negative dragon.
6--8=6+8=14
-2--5=-2+5=3
-8--1=-8+1=-7
To subtract a negative number is like taking away cold air - the room gets warmer.
so - - = +
And
- + = answer depends on which integer is greater, the positive, or the negative.
+118658 
+8262 
