Question

25-{20+[18-(13+10:2)]}
69-[26+(67-42)]
4+[(55-2•9)-(40:2+6)]

Answer 1

Resposta:

1) 25-{20+[18-(13+10:2)]}

=25−(20+18−(13+5))

=25−(20+18−18)

=25−(20+0)

=25−20

=5

2)69-[26+(67-42)]

=69−(26+25)

=69−51

=18

3)4+[(55-2•9)-(40:2+6)]

=4+55−18−(40/2+6)

=4+37−(40/2+6)

=4+37−(20+6)

=4+37−26

=4+11

=15

Explicação passo a passo: