Question

1. Calcule o valor das expressoes.

a) (3+2)x(5-1)+4 =

b) 82-8x7:(4-1x3) =

c) 25-[10-(2x3+1)] =

Answer 1

a) (3+2) x (5-1)+4 =
6 x (5-1)+4 =
6 x 4 + 4 =
24 + 4 =
28

b) 82-8 x 7:(4-1 x 3) =
82 - 8 x 7 : (4 - 3) =
82 - 8 x 7 : 1 =
82 - 56 : 1 =
82 - 56 =
26

c) 25-[10-(2 x 3+1)] =
25 - [10 - (6 + 1)] =
25 - [10 - 7] =
25 - 3 =
22