Solution: The original formula = 12- 14+62-25.

= 12+62- 14-25

=35

(2)5-(-7)+(- 12)

Solution: The original formula =5+7- 12.

=0

(3)(- 17)-(-32)+(-2 1)-(- 12)

Solution: The original formula =-17+32-21+12.

=6

(4)(-2/3)-(-2 3/4)-(2 2/3)-(+3.75)

Solution: The original formula =-2/3+2 3/4-2 2/3-3.75.

= 1