Respuesta :

raneenzo

Answer:

9-8=1

7-(-6)=13

Step-by-step explanation:

you just add it the normal way.

mhanifa

Answer:

See below

Step-by-step explanation:

See following examples

a and b

  • a- b

a and -b

  • a - (-b) = a + b

-a and b

  • -a - b = -(a + b)

-a and - b

  • -a - (-b) = -a + b = b - a