1.
EXERCÍCIOS
1) Calcule
a) 4 + 10 + 8 = (R: 22)
b) 5 – 9 + 1 = (R: -3)
c) -8 – 2 + 3 = (R: -7)
d) -15 + 8 – 7 = (R: -14)
e) 24 + 6 – 12 = (R:+18)
f) -14 – 3 – 6 – 1 = (R: -24)
g) -4 + 5 + 6 + 3 – 9 = (R: + 1)
h) -1 + 2 – 4 – 6 – 3 – 8 = (R: -20)
i) 6 – 8 – 3 – 7 – 5 – 1 + 0 – 2 = (R: -20)
j) 2 – 10 – 6 + 14 – 1 + 20 = (R: +19)
l) -13 – 1 – 2 – 8 + 4 – 6 – 10 = (R: -36)
2) Efetue, cancelando os números opostos:
a) 6 + 4 – 6 + 9 – 9 = (R: +4)
b) -7 + 5 – 8 + 7 – 5 = (R: -8)
c) -3 + 5 + 3 – 2 + 2 + 1 = (R: +6)
d) -6 + 10 + 1 – 4 + 6= (R: +7)
e) 10 – 6 + 3 – 3 – 10 – 1 = (R: -7)
f) 15 – 8 + 4 – 4 + 8 – 15 = (R: 0)
3) Coloque em forma simplificada ( sem parênteses)
a) (+1) + (+4) +(+2) = (R: 1 +4 + 2)
b) (+1) + (+8) + (-2) = (R: 1 + 8 – 2)
c) (+5) +(-8) + (-1) = (R: +5 – 8 – 1)
d) (-6) + (-2) + (+1) = (R: -6 – 2 + 1)

2.
4) Calcule:
a) (-2) + (-3) + (+2) = (R: -3)
b) (+3) + (-3) + (-5) = (R: -5)
c) (+1) + (+8) +(-2) = (R: +7 )
d) (+5) + (-8) + (-1) = (R: -4)
e) (-6) + (-2) + (+1) = (R: -7)
f) (-8) + ( +6) + (-2) = (R: -4)
g) (-7) + 6 + (-7) = (R: -8)
h) 6 + (-6) + (-7) = (R: -7)
i) -6 + (+9) + (-4) = (R: -1)
j) (-4) +2 +4 + (+1) = (R: +3)
5) Determine as seguintes somas
a) (-8) + (+10) + (+7) + (-2) = (R: +7)
b) (+20) + (-19) + (-13) + (-8) = (R: -20)
c) (-5) + (+8) + (+2) + (+9) = (R: +14)
d) (-1) + (+6) + (-3) + (-4) + (-5) = (R: -7)
e) (+10) + (-20) + (-15) + (+12) + (+30) + (-40) = (R: -23)
f) (+3) + (-6) + (+8) = (R: +5)
g) (-5) + (-12) + (+3) = (R: -14)
h) (-70) + (+20) + (+50) = (R: 0)
i) (+12) + (-25) + (+15) = (R: +2)
j) (-32) + (-13) + (+21) = (R: -24)
l) (+7) + (-5) + (-3) + (+10) = (R: +9)
m) (+12) + (-50) + (-8) + (+13) = (R: -33)
n) (-8)+(+4)+ (+8) + (-5) + (+3) = (R: +2)
o) (-36) + (-51) + (+100) + (-52) = (R: -39)
p) (+17) + (+13) + (+20) + (-5) + (-45) = (R:0)