Question

Calculati.
(-9supra10)+(-5supra 12)+(2supra15)+(-7supra30

Answer 1

$( - \frac{9}{10}) + ( - \frac{5}{12}) + ( \frac{2}{15}) + ( - \frac{7}{30}) = - \frac{9}{10} - \frac{5}{12} + \frac{2}{15} - \frac{7}{30} = \frac{ - 54 - 25 + 8 - 14}{60} = \frac{ - 85}{60} = - \frac{85}{60} = - \frac{17}{12}$

Answer 2

9. 5. 2. 7
-— - —. - — - —=
10. 12. 15. 30

54. 30. 8. 14
= - —. - —. - — - —. =
60. 60. 60. 60

54-30-8-14
= —————. =
60

=. 2
—. =. 30
60