Question

efetue os calculos
(+5)+(-3)+(-13)+(+18)+(-15)
(+8)+(-12)+(-25)+(+49)

Answer 1

( + 5) +(- 3) +(- 13) +(+ 18) +(- 15) = 
5 - 3 - 13 + 18 - 15 = 
- 8

(+ 8) +(- 12) +(- 25) +(+ 49) = 
8 - 12 - 25 + 49 =

Espero ter ajudado.

Answer 2

= (+5)+(-3)+(-13)+(+18)+(-15)
= 5 - 3 - 13 + 18 - 15
= 2 + 5 - 15
= 7 - 15
= - 8

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= (+8)+(-12)+(-25)+(+49)
= 8 - 12 - 25 + 49
= 8 + 49 - 37
= 57 - 37
= 20