0 * (-1) = 0
>9000
0
bodmas
It is: 2 minus 1 minus 1 = 0
0 Order of operations dictates you multiply before you subtract.
1.
8
3-2-1=0
X + 1 - x - 1 = 0, for all x. Regroup: (x - x) + (1 - 1) = 0 + 0.
1 - 1 = 0
0-(-1) is the same as 0+1, so 0-(-1)=1
0