Question

1- Calcule o valor das expressões:
a) - 5 - (-2 +3 - 1)
b) 18 + (-1 + 8 + 2)
c) + 2 +{+8—5 - (+7 - 2) - 7}
d) 25 - [18 - 6 + [9 - (4-2) - 51]}

Answer 1

Resposta:

a)

$-5-(-3+3)=\\-5-0=\\-5$

b)

$18+(10-1)=\\18+9=\\27$

c)

$+2+{+8-5-5-7}=\\+2+9=\\11$

d)

$25-{18-6+[9-2-51]}=\\25-{18-6-44}=\\25+32=\\57$