Page 152 - Basic College Mathematics with Early Integers

Vocabulary and Readiness Check

Use the choices below to fill in each blank. Not all choices will be used. (Review Section 1.3 if needed.)

-a a 0 commutative associative

1. If n is a number, then -n + n = .
2. Since x + n = n + x , we say that addition is .
3. If a is a number, then -1-a2 = .
4. Since n + 1x + a2 = 1n + x2 + a , we say that addition is .
Add.

5. 5 + 0 6. 1-22 + 0 7. 0 + 1-352 8. 0 + 3

9. -12 + 12 10. 48 + 1-482 11. 28 + 1-282 12. -9 + 9

2.3 Exercise Set FOR EXTRA HELP

Objective Add using a number line. See Examples 1 through 3.

1. -1 + 1-62 2. 9 + 1-42

7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 14 12 10 8 6 4 2 0 2 4 6 8 10 12 14
3. -4 + 7 4. 10 + 1-32

14 12 10 8 6 4 2 0 2 4 6 8 10 12 14
7 6 5 4 3 2 1 0 1 2 3 4 5 6 7
5. -13 + 7 6. -6 + 1-52

14 12 10 8 6 4 2 0 2 4 6 8 10 12 14
14 12 10 8 6 4 2 0 2 4 6 8 10 12 14

Add. See Examples 4 through 13.

7. 23 + 12 8. 15 + 42 9. -6 + 1-22 10. -5 + 1-42 11. -43 + 43

12. -62 + 62 13. 6 + 1-22 14. 8 + 1-32 15. -6 + 8 16. -8 + 12

17. 3 + 1-52 18. 5 + 1-92 19. -2 + 1-72 20. -6 + 1-12 21. -12 + 1-122

22. -23 + 1-232 23. -25 + 1-322 24. -45 + 1-902 25. -123 + 1-1002 26. -500 + 1-2302

27. -7 + 7 28. -10 + 10 29. 12 + 1-52 30. 24 + 1-102 31. -6 + 3

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