Question

Calcule as expressões numéricas

$30 - (2 + 1) {}^{2} + 2 ^{3} =$

$30 - [ {6}^{2} \div (5 - 3 + 1 ] =$


$20 - [6 - 4 \times (10 - 3 {}^{2} + 1 ] =$

Answer 1

$30- 3^{2} +8$ =
30 - 9 + 8 =
21 + 8 =
29

$30-[ 6^{2} /3]$ =
30 - [36 / 3] =
30 - 12 =
18

$20-[6-4*(10-9+1)=$
20 - [6 - 4 * 2] =
20 - [6 - 8] =
20 - (-2) =
20 + 2 =
22