48 Chapter 1 Whole Numbers For Exercises 7–10, write the repeated addition as multiplication and simplify. 7. 8. 5 5 5 5 5 5 2 2 2 2 2 2 2 2 2 9. 10. 9 9 9 7 7 7 7 For Exercises 11–14, identify the factors and the product. (See Example 1.) 11. 12. 13 42 546 26 9 234 13. 14. 3 5 2 30 4 3 8 96 15. Write the product of 5 and 12, using three different notations. (Answers may vary.) 16. Write the product of 23 and 14, using three different notations. (Answers may vary.) Concept 2: Properties of Multiplication For Exercises 17–22, match the property with the statement. 17. 8 1 8 a. Commutative property of multiplication 18. 6 13 13 6 b. Associative property of multiplication 19. 216 122 2 6 2 12 c. Multiplication property of 0 20. 5 13 22 15 32 2 d. Multiplication property of 1 21. 0 4 0 e. Distributive property of multiplication over addition 22. 71142 14 172 For Exercises 23–28, rewrite the expression, using the indicated property. (See Examples 2 and 3.) 23. 14 8; commutative property of multiplication 24. 3 9; commutative property of multiplication 6 12102; 14 152 5; 25. associative property of multiplication 26. associative property of multiplication 517 42; 312 62; 27. distributive property of multiplication 28. distributive property of multiplication over addition over addition Concept 3: Multiplying Many-Digit Whole Numbers For Exercises 29–60, multiply. (See Examples 4–6.) 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 4801 5 3312 7 2016 6 1410 8 105 9 344 4 725 3 131 5 71 3 26 2 18 5 24 6
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