Question

Efetue as operações a seguir: a) – 5 – (– 3) – (+7) + 4 = b) 67 – 203 = c) 16 – 28 = d) (– 3) • ( – 15) = e) (– 31) • (+25) =

Answer 1

Resposta:

a) -5-(-3)-(+7)+4 = -5+3-7+4 = +3+4-5-7 = +7-12 = -5.

b) 67 - 203 = -136

c) 16 - 28 = -12

d) (-3) × (-15) = + 45

e) (-31) × (+25) = -775