10 - (-9) = 19
19
10
you need 11 more.
You need to add 6 - (-9) = 6 + 9 = 15.
you need to add +9 +9-7 = +2
19
You need to add 18 to negative 8 to get 10.
18
you need to add 10
When you add -9 and +10, you get (+) 1.
19
add 9 plus 5 than subtract 1 from 5 to add it to 9 will give you 10