Question

25-{20+[18-(13+10÷2)]}

Answer 1

25-{20+[18-65]}
25-{20+[-47]}
25-{20-47}
25-{-27}
25+27
52

Answer 2

Olá,

Vamos lá,

=25-{20+[18-(13+10÷2)]}
=25-{20+[18-(13+5)]}
=25-{20+[18-(18)]}
=25-{20+[18-18]}
=25-{20}
= 25 - 20
= 5