Question

1) Usando os jogos de sinais, calcule o valor das expressões:
a) -6 . ( -9 + 2 )
b) -3 . ( -7 – 8 )
c) ( -4 + 12 ) . ( -9 -3 )
d) ( -12 -13 ) : ( -5 )
e) ( -65 + 5 ) : ( -3 -2 )
f) 23 – [ -9 + ( -18 + 7 )]
g) -7 + { 11 – [ -9 – ( -12 + 6 ) ] }
h) -35 + [ ( -12 – 3 ) : ( -5 )]
i) -6 – 6 . ( -6 )
j) 5 – ( -5 + 7 ) . ( -13 + 9 )
k) ( -8 ) . ( -9 ) – ( -3 ) . ( -11 )

Answer 1

Resposta e Explicação passo-a-passo:

a) -6 . ( -9 + 2 )

  -6 . ( -7 ) = 42

b) -3 . ( -7 – 8 )

  -3 . ( -15 )  = 45

c) ( -4 + 12 ) . ( -9 -3 )

   8 . ( -12 )  = -96

d) ( -12 -13 ) : ( -5 )

   ( -25 ) : ( -5 )  = 5

e) ( -65 + 5 ) : ( -3 -2 )

   ( -60 ) : ( -5 ) = 12

f) 23 – [ -9 + ( -18 + 7 )]

  23 – [ -9 + ( -11 )]

  23 – [ -9 – 11 ]

  23 – [-20]

  23 + 20 = 43

g) -7 + { 11 – [ -9 – ( -12 + 6 ) ] }

   -7 + { 11 – [ -9 – ( -6 ) ] }

   -7 + { 11 – [ -9 + 6 ] }

   -7 + { 11 – [ -3 ] }

   -7 + { 11 + 3  }

   -7 + 14 = 7

h) -35 + [ ( -12 – 3 ) : ( -5 )]

   -35 + [ ( -15 ) : ( -5 )]

   -35 + 3  = -32

i) -6 – 6 . ( -6 )

  -6 – (-36)

  -6 + 36  = 30

j) 5 – ( -5 + 7 ) . ( -13 + 9 )

  5 – 2 . ( -4 )

  5 – ( -8 )

  5 + 8 = 13

k) ( -8 ) . ( -9 ) – ( -3 ) . ( -11 )

   72 – 33 = 39