Question

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Answer 1

Explicação passo-a-passo:

a) - 35

b) + 72

c) 30

d) -99

e) - 42

f) +66

Answer 2

Resposta:

a) (+7) • (-5) = -35

b) (-9) • (-8) = +72

c) (+10) • (+3) = +30

d) (+9) • (-11) = -99

e) (-7) • (+6) = -42

f) (+6) • (+11) = +66