Question

1. +(+12)=
2. -(+25)=
3. +(-22)=
4. -(-18)=
5 +(+12)+(+40)=
6. +(+15)+(-18)=
7. +(+12)-(10)=
8. +(+23)-(40)-(-30)=
9. (+10)-(-45)-(-12)=
10.+(-20)+(-30)+(-8)=

Answer 1

1=12.000000
2=-25.0000
3=-22
4= 18