Задание

Найдите знаки множителей:

\(\displaystyle \times\) \(\displaystyle 3\) [?||-]\(\displaystyle 1\)
[?||-]\(\displaystyle 6\) \(\displaystyle 18\) \(\displaystyle -6\)
[?||-]\(\displaystyle 8\) \(\displaystyle 24\) \(\displaystyle -8\)