Question

(1 pe 12 - 1 pe 18)ori 9 - 1,25

Answer 1

$( \frac{1}{12} - \frac{1}{18}) \times 9 - 1,25 = \frac{1}{12} - \frac{1}{18} = \frac{1 \times 3}{12 \times 3} - \frac{1 \times 2}{18 \times 2} = \frac{3}{36} - \frac{2}{36} = \frac{3 - 2}{36} = \frac{1}{36} = \frac{1}{36} \times 9 = \frac{1 \times 9}{36 \times 1} = \frac{9}{36} ^{(9} = \frac{1}{4} = 1,25 = \frac{125}{100} ^{(25} = \frac{5}{4} = \frac{1}{4} - 1,25 = \frac{1}{4} - \frac{5}{4} = \frac{1 - 5}{4} = - \frac{4}{4} = - 1$