Question

7) Efetue as operações. a) (–5) + (–3) = b) (+7) + (+2) + (–8) = c) (+15) + (–1) + (–7) = d) (+8) + (+3) + (–10) =

Answer 1

A) (-5)+(-3) =

-5-3 =

-8

B) (+7)+(+2)=

7+2 =

9

C) (+15)+(-1)+(-7) =

15-1-7 =

7

D) (+8)+(+3)+(-10) =

(8+3) + (-10) =

11 - 10 =

1