\(-\dfrac{2
}{3}.\dfrac{9}{7}+\dfrac{3}{4}:2,5
\)
= \(-\dfrac{6}{7}+\dfrac{3}{10}\)
= \(-\dfrac{39}{70}\)
\(-\dfrac{2}{3}.\dfrac{9}{7}+\dfrac{3}{4}:2,5\)
\(=-\dfrac{2}{3}.\dfrac{9}{7}+\dfrac{3}{4}.\dfrac{2}{5}\)
\(=-\dfrac{6}{7}+\dfrac{3}{10}\)
\(=\dfrac{-39}{70}\)