Question

Façam os cálculos por favor, obrigado.

1)Efetue:
a) – 1 – 2 – 3 =
b) – 4 – 5 – 8 + 10 =
c) – 7 + 20 – 15 + 20 – 1 =
d) 8 – 10 – 7 + 13 – 14 + 5 – 6 =
e) – 13 + 7 – 9 + 5 – 13 =
f) – 20 + 10 – 10 + 20 + 14 – 13 – 1 =
g) – 8 – 10 + 17 – 3 + 4 – 7 + 8 – 1 =
h) – 6 – 7 – 13 – 26 + 54 – 2 =
i) (- 6 + 8) – (- 3 + 8) + (5 – 6) =
j) – (- 3 – 1) – (- 6 + 4 – 1) – 6 – (- 3 + 2) =
k) 18 – (- 5 – 2 – 3) + 20 – (- 6 + 8) – (- 1 – 8 + 3) =
l) – 32 – 1 – (- 12 + 14 + 7) + (- 5 – 6 – 9 + 3) – 17 =

Answer 1

a) – 1 – 2 – 3 =

-3-3

-6

b) – 4 – 5 – 8 + 10 =

-17+10

-7

c) – 7 + 20 – 15 + 20 – 1 =

13-15+20-1

-2+20-1

18-1

17

d) 8 – 10 – 7 + 13 – 14 + 5 – 6 =

4-14+5-6

-10+5-6

-5-6

-11

e) – 13 + 7 – 9 + 5 – 13 =

-6-9+5-13

-15+5-13

-10-13

-23

f) – 20 + 10 – 10 + 20 + 14 – 13 – 1 =

-20+20+14-13-1

14-13-1

1-1

0

g) – 8 – 10 + 17 – 3 + 4 – 7 + 8 – 1 =

-4+4-7+8-1

-7+8-1

1-1

0

h) – 6 – 7 – 13 – 26 + 54 – 2 =

-26-26+54-2

-52+54-2

2-2

0

i) (- 6 + 8) – (- 3 + 8) + (5 – 6) =

2-(-3+8)+5-6

2-5+5-6

-3+5-6

2-6

-4

j) – (- 3 – 1) – (- 6 + 4 – 1) – 6 – (- 3 + 2) =

-4(-4)-(-3)-6-(-1)

4+3-6+1

7-6+1

1+1

2

k) 18 – (- 5 – 2 – 3) + 20 – (- 6 + 8) – (- 1 – 8 + 3) =

18-(-10)+20-2-(-6)

18+10+20-2+6

42-2+6

46+6

52

l) – 32 – 1 – (- 12 + 14 + 7) + (- 5 – 6 – 9 + 3) – 17 =

−32−1−(2+7)−5−6−9+3−17

-47-6-9+3-17

-53-9+3-17

-59-17

-76