Question

4 - RESOLVA AS EXPRESSÕES
A) 45-[39/(2.6+1)]
B) 9-2/2
C) 3.V 81-2.3
​

Answer 1

$a)45 - ( \frac{39}{2.6 + 1} ) = \\ 45 - ( \frac{39}{13} ) = 45 - 3 = 42$

$b)9 - \frac{2}{2} = 9 - 1 = 8$

$c)3 \times \sqrt{81} - 2.3 = 3 \times \sqrt{9 \times 9} - 6 = \\ 3 \times 9 - 6 = 27 - 6 = 21$