5 + - 6
-1
3 + 6 =
9
9 +(-2)
7
9 + (14) =
23
-12+ 25
13
-16+ -21 + 20
- 17
-6 + 5+ (-10)=
-11
-4 +(-4) = Show your addition problem
-8
Press F11 Select menu option View > Enter Fullscreen for full-screen mode