Question

(+ 8 ) + ( - 9 ) =

( + 20 ) - ( - 12 ) =




(- 30 ) - ( + 10 ) =




l +12 l - l -3 l =

Answer 1

Respuesta:

1) -1 2) 32 3) -40 4) 8

Explicación paso a paso:

(+ 8 ) + ( - 9 ) =

8 - 9 = -1

( + 20 ) - ( - 12 ) =

20 + 12 = 32

(- 30 ) - ( + 10 ) =

-30 - 10 = -40

l +12 l - l -3 l =

12 - 3 = 8