Question

Calculati: d) (7/9+17/10-1/18)-(13/27-1/18) e) (13/63+17/45)-(5/36-1/27) cu tot cu rezolvare.

Answer 1

$d) \: ( \frac{7}{9} + \frac{17}{10} \: - \frac{1}{18}) - ( \frac{13}{27} - \frac{1}{18}) = \frac{539}{270}$
$( \frac{7}{9} + \frac{17}{10} - \frac{1}{18}) = \frac{109}{45}$
$( \frac{13}{27} - \frac{1}{18} ) = \frac{23}{54}$
$\frac{109}{45} - \frac{23}{54} = \frac{539}{270}$
$e)( \frac{13}{63} + \frac{17}{45} ) - ( \frac{5}{36} - \frac{1}{27} ) = \frac{1823}{3780}$
$( \frac{13}{63} + \frac{17}{45} ) = \frac{184}{315}$
$( \frac{5}{36} - \frac{1}{27} ) = \frac{11}{108}$
$\frac{184}{315} - \frac{11}{108} = \frac{1823}{3780}$