Multiply integers with different signs

Multiply the sizes. Same signs give a positive product. Different signs give a negative product.

1. Evaluate: −3 × 10
2. Evaluate: 6 × (−6)
3. Evaluate: −8 × 4
4. Evaluate: −6 × 11
5. Evaluate: −7 × 7
6. Evaluate: −4 × 7
7. Evaluate: 2 × (−7)
8. Evaluate: 6 × (−8)
9. Evaluate: −8 × 19
10. Evaluate: 5 × (−18)
11. Evaluate: −17 × 14
12. Evaluate: −13 × 16
13. Evaluate: −23 × 5
14. Evaluate: 10 × (−23)
15. Evaluate: −2 × 24
16. Evaluate: 13 × (−14)
17. Evaluate: −21 × 21
18. Evaluate: 5 × (−9)
19. Evaluate: 14 × (−25)
20. Evaluate: 20 × (−16)