35821

I knew to make 0 i would need a negative number.From there i thought that we would need a 10 to achieve the numbers above 10,eg:11,13,15.To achieve 15 i would need a 5 , for 13 i would need a 3 and for 11 i would need a 1. The numbers i now have are:
3,10,5,1.
I now need one more number.To achieve 0 i would need a negative number,-1.
My numbers are:
3,10,5,1,-1

I then tested the numbers with all the numbers givern and then double checked my answer .

My results were:
0=-1+1
2=-1+3
4=3+1
4=-1+5
6=5+1
8=5+3
9=-1+10
11=10+1
13=10+3
15=10+5

And so i knew my calculations were corrected and that i had worked out this question.