Question

expressao numerica passo a passo
84-(3.2-5)
(15-20:4).2-1
(4.15-9):3-8
3.[(42-8.5) + (38-7.5)]

Answer 1

Olá,

Vamos lá,

=84-(3.2-5)
=84-(6-5)
=84-1
=83


=(15-20:4).2-1
=(15-5).2-1
=10.2-1
= 20-1
= 19


=(4.15-9):3-8
=(60-9):3-8
= 51:3 -8
= 17 -8
=9

=3.[(42-8.5) + (38-7.5)]
=3.[(42-40) + (38-35)]
=3.[ 2 + 3]
=3. 5
= 15