November 2019 1 71 Report
13. Resolva cada expressão abaixo.

a) 5 + (2 - 6)

b) - 15 - (- 23 + 12)

c) (9-15)+(12-20)

d) (-9+5)-(-6-8-4)

e) -(-2) + (-3) - {-2+[-1-(-2+1)]+5

f) 20- {-10-[-8+(5-12)]+20}
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