Question

1) Calcule:
a) 45 – 35 – 25 -15 =
b) – 35 + 15 – 25 + 5 =
c) −10 + 12 − 7 + 9 =
d) 17 + 15 − 25 + 13 =
2) Calcule: ( lembre-se da regra de sinais)
a) (+6) – ( -3) =
b) (+4) – ( -9) =
c) (+8) – ( +9) =
d) (-17) – ( -3) =
e) (-9) – ( +10) =
f) (-8) – ( -12) =

+ 20 pontos

Answer 1

Explicação passo-a-passo:

1.

a) 45 – 35 – 25 -15

45 - 75

- 30

b) – 35 + 15 – 25 + 5

- 60 + 20

- 40

c) −10 + 12 − 7 + 9

- 17 + 21

4

d) 17 + 15 − 25 + 13

- 25 + 45

20

2.

a) (+6) – ( -3)

+6 +3

+9

b) (+4) – ( -9)

+4 +9

+13

c) (+8) – ( +9)

+8 -9

-1

d) (-17) – ( -3)

-17 + 3

-14

e) (-9) – ( +10)

-9 -10

-19

f) (-8) – ( -12)

-8 +12

+4