Question

(09) Calcule:

a) ( + 12 ) + ( + 21 ) =

b)( +23) + ( + 21) =

c) (-23) + (-4) =

d) ( + 10 ) + ( - 13 ) =​

Answer 1

Resposta:

a) ( + 12 ) + ( + 21 ) =

+12+21

33

b)( +23) + ( + 21) =

+23+21

44

c) (-23) + (-4) =

-23-4

-27

d) ( + 10 ) + ( - 13 ) =​

+10-13

-3

Espero ter ajudado vc!    

Att: Ster019