Question

(-7supra10):(+14supra15)-(-1supra30)·2intregi 1supra2

Answer 1

[tex] \frac{-7}{10} : \frac{14}{15} - \frac{-1}{30} *2 \frac{1}{2} =\\\\ \frac{-7}{10} : \frac{14}{15} - \frac{-1}{30} * \frac{2*2+1}{2} =\\\\ \frac{-7}{10} : \frac{14}{15} - \frac{-1}{30} * \frac{5}{2}=\\\\ \frac{-3}{4} - \frac{-1}{12}= \\\\ \frac{-3*3}{4*3} - \frac{-1}{12} =\\\\ \frac{-9}{12} - \frac{-1}{12} =\\\\ \frac{-8}{12} [/tex]