Задание

Расставьте знаки в произведениях:

\(\displaystyle \times\) \(\displaystyle -5\) \(\displaystyle 4\)
\(\displaystyle -5\) [?||-]\(\displaystyle 25\) [?||-]\(\displaystyle 20\)
\(\displaystyle -2\) [?||-]\(\displaystyle 10\) [?||-]\(\displaystyle 8\)