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Multiplication and division with negatives

Stuck? Read the notes

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Evaluate the following without a calculator:

1. (-12) \times 9
2. (-3) \times 2
3. (-9) \times (-3)
4. (-2) \times 4
5. 13 \times (-13)
6. (-8) \times (-5)
7. (-10) \times (-8)
8. 5 \times (-12)
9. (-8)^{2}

Find the answer to the following divisions, without using a calculator:

10. 168 \div (-12)
11. (-108) \div 9
12. (-126) \div (-14)
13. 8 \div (-4)
14. 50 \div (-10)
15. (-33) \div 3
16. (-28) \div (-7)
17. (-20) \div 2
18. (-33) \div (-11)

Quick mix. Find, without a calculator:

19. 4 \times (-9)
20. (-72) \div (-6)
21. (-84) \div 12
22. (-14) \times (-5)
23. (-15)^{2}
24. \left( (-25) \times (-3) \right) \div (-5)