Question

QUAL O VALOR DA EXPRESSÃO 1/2 - (3/4 - 5/4):

Answer 1

Resposta:

$\frac{1}{2} - ( \frac{3}{4} - \frac{5}{4} ) \\ = \frac{1}{2} - ( \frac{3 - 5}{4} ) \\ = \frac{1}{2} - ( \frac{ - 2}{4} ) \\ = \frac{1}{2} + \frac{1}{2} = \frac{2}{2} = 1$