Question

calculează (1/2-3/4)-(5/2-5/4)-(3/2-3/4)

Answer 1

= 1/2 - 3/4 - 5/2 + 5/4 - 3/2 + 3/4
= 2/4 - 3/4 - 10/4 + 5/4 - 6/4 + 3/4
= - 9/4

Answer 2

$(\frac{1}{2} - \frac{3}{4}) - ( \frac{5}{2} - \frac{5}{4} ) - ( \frac{3}{2} - \frac{3}{4})= \\ \frac{-1-5}{4} - \frac{3}{4} = \\ \frac{-6}{4} - \frac{3}{4}= \frac{-6-3}{4} = \frac{-9}{4} = - \frac{9}{4} =-2 \frac{1}{4}$