Question

(Urgente!!) Calcule:
$a) \: {2}^{2} + \ \sqrt{81} \div 9 =$
$b) \: {2}^{3} + \sqrt{100} \div 5 - {3}^{2} =$
$c) \: 2 \times ( \sqrt{1} \div 5 - \sqrt{16}) =$
$d) \: {8}^{2} \div (6 \times 2 - \sqrt{100} =$
$e) \: 12 \times | {9}^{2} - \sqrt{64} + 7 \times 10)| =$
$f) \: {2}^{3} \div 4 + 3 | \sqrt{25} - (3 - 1) - 7| =$

Answer 1

$a) \: {2}^{2} + \ \sqrt{81} \div 9 = \\ 4 + 9 \div 9 \\ 4 + 1 \\ 5$






$b) \: {2}^{3} + \sqrt{100} \div 5 - {3}^{2} \\ 8 + 10 \div 5 - 9 \\ 8 + 2 - 9 \\ 10 - 9 \\ 1$




$c) \: 2 \times ( \sqrt{1} \div 5 - \sqrt{16}) \\ 2 \times (1 \div 5 - 4) \\ 2 \times (0.2 - 4) \\ 2 \times ( - 3.8) \\ - 7.6$






$d) \: {8}^{2} \div (6 \times 2 - \sqrt{100}) \\ 64 \div (12 - 10) \\ 64 \div 2 \\ 32$





$\: e) \: 12 \times | {9}^{2} - \sqrt{64} + 7 \times 10)| \\ 12 \times |81 - 8 + 70 | \\ 12 \times |73 + 70 | \\ 12 \times 143 \\ 1716$






$f) \: {2}^{3} \div 4 + 3 | \sqrt{25} - (3 - 1) - 7| \\ 8 \div 4 + 3 |5 - 2 - 7 | \\ 2 + 3 |3 - 7| \\ 5 | - 4| \\ 1$