1 plus negative 10 is equal to -9.
The sum of -9 and -1 is -10.
When you add -9 and +10, you get (+) 1.
It's 9. Hope I helped! :)
9+10=21
-9/10 + 3/15 = -6/25... Possibly that's what I think it is...
it is 10 over 9
2/9 minus (negative 8/9) = 2/9 + 8/9 = 10/9
9 over 10
9/10
6/5 + 2/-9 = 44/45
10/9