Question

02- Utilizando as regras de sinais, calcular:

a) – 4 . ( +9) =

b) 6 . ( -5) =

c) + 4. ( + 12) =

d) 38 : ( - 2) =

e) – 99 : ( - 33)

f) - 2. ( -8) + ( - 55) : ( -5) + 12. ( - 3) =

g) -15 . ( - 11) + ( -4 -6 +2+7+1-4) – 6. ( 5 – 8) =

h) (10) : (-5) + 5. ( +5) -5-5-5. (-5) -5-5+5. (10) =​

Answer 1

Resposta:

a) -4 • ( 9 ) = - 36

b) 6 • ( -5 ) = - 30

c) 4 • ( 12 ) = 48

d) 38 ÷ ( -2 ) = -19

e) -99 ÷ ( -33 ) = 3

f) -2 • ( -8 ) + ( -55 ) ÷ ( -5 ) + 12 • ( -3 ) = -59,4

g) -15 • ( -11 ) + ( -4 -6 + 2 + 7 + 1 -4 ) -6 • ( 5 - 8 ) = 165

h) ( 10 ) ÷ ( -5 ) + 5 • ( 5 ) -5 -5 -5 • (-5) -5 -5 + 5 • (10) = -450