Question

(⅔)-2=
(½)-3=
(-¾)²-1=
⅔+(½)-8=
(1+½)²-¼=

Answer 1

Explicação passo-a-passo:

$\frac{2}{3} - 2 = \frac{2 - (3 \times 2)}{3} = \frac{2 - 6}{ 3} = - \frac{4}{3} \\ \\ \frac{1}{2} - 3 = \frac{1 - (2 \times 3)}{2} = \frac{1 - 6}{2} = - \frac{5}{2} \\ \\ {( - \frac{3}{4} )}^{2} - 1 = \frac{9}{16} - 1 = \frac{9 - 16}{16} = - \frac{7}{16} \\ \\ \frac{2}{3} + \frac{1}{2} - 8 = \frac{(2 \times 2) + 3 - (6 \times 8)}{3 \times 2} = \frac{4 + 3 - 48}{6} = - \frac{41}{6} \\ \\ {(1 + \frac{1}{2} )}^{2} - \frac{1}{4} = {( \frac{2 + 1}{2} )}^{2} - \frac{1}{4} = {( \frac{3}{2}) }^{2} - \frac{1}{4 } = \frac{9}{4} - \frac{1}{4} = \frac{8}{4} = 2$