Question

determine o valor expressão numéricas
a) 21-[17+(19-4)+2]

b) 39+[-10-(32-10-8)+9]

c) 6-{9+[-17+14-(8+17-12)]}
​

Answer 1

Explicação passo-a-passo:

a) 21-[17+(19-4)+2]

21-[17+15+2]

21-34=13

b) 39+[-10-(32-10-8)+9]

39+[-10-(14)+9]

39+[-10-14+9]

39+[-15]=24

c)6-{9+[-17+14-(8+17-12)]}

6-{9+[-17+14-(13)]}

6-{9+[-17+14-13]}

6-{9+[-16]}

6-{-7}

6+7=13