Question

Resolva as expressões

Answer 1

Olga só respondi a letra:a

Answer 2

Olá, boa tarde!

a) 3 + [(5 - 3)² + 4] - 7 + 2

3 + [2² + 4] - 7 + 2

3 + [4 + 4]  - 7 + 2

3 + 8 - 7 + 2

11 - 7 + 2

4 + 2

6

b) $\frac{1}{3} . (\frac{-1}{4}) . \frac{1}{2}$

$- \frac{1}{3 . 4} . \frac{1}{2}$

$- \frac{1}{12} . \frac{1}{2}$

$- \frac{1}{2 . 12}$

$-\frac{1}{24}$