Question

3 x 1/6 -9/4 : 1 x 1/2 +3 -1/4
obs : o x é multiplicação

Answer 1

$3. \frac{1}{6} - \frac{9}{4} : \frac{1}{2} +3- \frac{1}{4} = \frac{1}{2} - \frac{9}{4} .2+3- \frac{1}{4} =\frac{1}{2} - \frac{9}{2}+3- \frac{1}{4} = \frac{2.1-2.9+3.4-1}{4} \\ \\ = \frac{2-18+12-1}{4} = \frac{14-19}{4} =- \frac{5}{4}$