Question

qual das opções representa o valor das expressões:

(20-5) : 3 ³ + (2 +1).

(140-15) : 5 ² + [3.7 ¹  _ (4.3 + 5) + 1  ]

Answer 1

a) $\frac{20-5}{3^{3}+(2+1) } = \frac{15}{27+3} = \frac{15}{30} = \frac{1}{2}$

b)$\frac{140-15}{5^2+[3,7^1-(4,3+5)+1]} = \frac{125}{25[3,7-9,3+1]}= \frac{25*4}{25(4,6)} = \frac{4}{4,6}$