Question

calcule os produtos: a) (+5).(-1).(+2) b) 3.4.(-7)
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Answer 1

$(5) \times ( - 1) \times (2) = - 10 \\ 3 \times 4 \times ( - 7) = - 84.$

Answer 2

a) (+5).(-1).(+2) = -5*(2)= -10

b) 3.4.(-7) = 3*(-28)= -84