Question

Calcule o valor das expressões.

Answer 1

a) 49 - 10 + ( 8 - 5 ) =
39 + 3=
36
b) 32 - ( 8 + 9 ) =
32 - 17 =
15
c) [ 100 - ( 25 - 9 ) ] ÷ 2 =
[ 100 - 16 ] ÷ 2 =
84 ÷ 2 =
42
d) 7 + [ 25 ÷ 5 + 8. × 2 ] =
7 + [ 5 + 16 ] =
7 + 21 =
28
e) 50 - 2 × [ 8 + ( 10 - 9 ) - 3 ]=
50 - 2 × [ 8 + 1- 3 ] =
50 - 2 × [ 9 - 3 ] =
50 - 2 × 6 =
50 - 12 =
38
f) 2 × [ ( 6 + 7 . 3 ) ÷ 9 + ( 21 - 5 × 2 ) ] =
2 × [ ( 6 + 21 ) ÷ 9 + ( 21 - 10 ) ] =
2 × [ 27 ÷ 9 + 11 ] =
2 × [ 3 + 11 ] =
2 × 14 =
28