2) Calcule as formas algébricas:

a) (+3) + (+5) + (-6) =

b) (+8) + (-6) + (-4) =

c) (3+) - (+5) - (-10) =

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

3) Dê o valor das somas algébricas:

a) +8 + 7

b) 9 + 3

c) -10 + 5

d) -2 + 8

e) 10 - 2

f) 3 - 5

MUITO OBRIGADA!
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