10
19
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.
you need to add 3/10 to 7/10 to get 10/10 or 1.
your expression is this... x + -10 = 2 x = 12 You need a 12 to add to -10 to get 2