Question

O valor numérico da expressão {[(8 • 4 + 3) ÷ 7 + (3 + 15 ÷ 5) • 3] • 2 – (19 – 7) ÷ 6} • 2 + 12.} é: * a) 100 b) 90. c) 80. d) 70.

Answer 1

{[(8 • 4 + 3) ÷ 7 + (3 + 15 ÷ 5) • 3] • 2 – (19 – 7) ÷ 6} • 2 + 12.}

{[(32+3)÷7+(3+3).3].2-12÷6}.2+12} =

{[ 35÷7+6.3].2-12÷6}.2+12} =

{[ 5+18].2-12÷6}.2+12}=

{ 23.2-12÷6}.2+12}=

{ 46 - 2}.2+12} =

{44.2+12} =

88+12=

100

Letra A

Bons estudos!