Question

calcule
a(+3)+(+5)+(-2)+(1)+(+8)
b(-5)+(-6)+(-2)+(-5)

Answer 1

a) (+3)+(+5)+(-2)+(1)+(+8)
3 + 5 - 2 + 1 + 8
8 +9 - 2
17 - 2
15

b) (-5)+(-6)+(-2)+(-5)
-5 - 6 -2 -5
-11 - 7 
-18

Answer 2

a)
= (+3) + (+ 5) + (- 2) + (1) + (+8)

= 3 + 5 - 2 + 1 + 8

= 8 - 2 + 9

= 6 + 9

= 15

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b)
= (- 5) + (- 6) + (- 2) + (- 5)

= - 5 - 6 - 2 - 5

= - 11 - 7

= - 18