Question

1)Resolva as seguintes expressões numéricas:

A) {3+2x[-4:(12-5)]+9}

B)13-2x5+4x(-3)

C)(-16):4+3x(-9)

D)-9-5x(-2)

E){[9-(4+3)x2-10+1]+18:2}

Legenda:
: = divisão

Answer 1

A) {3+2x[-4:(12-5)]+9} = {3+2x[-4: 7]+9}

   3 - 8 +9 ==> 21-8+63 ==> 76
        7                   7               7
============================================
B)13-2x5+4x(-3) = 13-10-12 = - 9
===================================================
C)(-16):4+3x(-9) = (-16):4-27 = - 4-27 ==> - 31

D)-9-5x(-2) = - 9 + 10 ==> + 1
==============================================
E) {[9-(4+3)x2-10+1]+18:2}
     {[9-12x2-11]+9}
     {[9-24-11]+9}
       9 - 35 + 9
          - 17