Определите знак произведений.

• Группы
  • Положительный
  • Отрицательный
• Варианты
  • −2 ⋅ \(−3\) ⋅ \(−9\) ⋅ \(−13\) ⋅ \(−27\) ⋅ 14 ⋅ \(−2,9\)
  • 33 ⋅ \(−54\) ⋅ 181 ⋅ \(−67\) ⋅ 12 ⋅ \(−30\)
  • 19 ⋅ \(−14\) ⋅ 18 ⋅ \(−13\) ⋅ 16 ⋅ \(−15\)
  • −4 ⋅ \(−11\) ⋅ \(−12\) ⋅ \(−15\) ⋅ \(−17\) ⋅ \(−1\) ⋅ 70 ⋅ 80