Question

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Answer 1

Resposta:

1-a) (+7) × (-5) = -35

b) (-9) × (-8) = + 72

c) (+10) × (+3) = + 30

d) (+9) × (-11) = -99

e) (-7) × ( +6) = - 42

f) (+6) × (+11) = + 66

(Lembre- se da regra do sinal + ×+ =+ / - × - = + / + × - = -)

2-a) 2 b) -5 c) -3 d)+4

3-a) (-9)×(+12)×(-2) b) (-7)×(-10)×(-5)

-108 × (-2) +70 ×(-5)

+216 -350