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Multiplication and division with negatives

Stuck? Read the notes

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Evaluate the following without a calculator:

1. 5 \times (-12)
2. (-3) \times (-10)
3. (-10) \times 2
4. 4 \times (-13)
5. 12 \times (-7)
6. (-7) \times 9
7. (-11) \times (-6)
8. (-2) \times 11
9. (-9)^{2}

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

10. (-24) \div (-12)
11. (-32) \div 8
12. (-90) \div (-10)
13. 56 \div (-4)
14. 66 \div (-11)
15. 63 \div (-9)
16. (-77) \div 7
17. (-72) \div 6
18. (-65) \div (-13)

Quick mix. Find, without a calculator:

19. 10 \times (-10)
20. (-28) \div (-4)
21. (-112) \div 14
22. (-3) \times (-8)
23. (-14)^{2}
24. \left( (-35) \times (-2) \right) \div (-7)