Question

Calcule o valor das expressões

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

b) (12 - 2) - 3 + (8 + 7 - 5)=

c) (8 - 4 + 2) - 1 + (9 + 5 - 3)=

d) 17 - (3 - 2) + (7 - 4)=​

Answer 1

a) -5+3+2-1-8= -9

b) 10-3+10= 17

c) 6-1+11= 16

d) 17-1+3= 19

Answer 2

A)

-5+3+2-1-8

-2+2-1-8

0-1-8

-9

B)

(12-12)-3+(8+7-5)

0-3+(15-5)

-3+10

7

C) (8-4+2)-1+(9+5-3)

(4+2)-1+(14-3)

6-1+11

5+11

16

D) 17-(3-2)+(7-4)

17-1+3

16+3

19