Math Review Chapter 5

1. Math Review Chapter 5

2. Which number closest to the sum of 272 and 611 (estimate)? • 400 • 1200 • 1000 • 900

3. 900

4. Which of the following is closest to the product of 68 and 42 ? • 280 • 2800 • 28,000 • 280,000

5. 2,800

6. An average of 20,000 pounds of hamburger is eaten each day in Pennsylvania. How much hamburger is eaten in one week?

7. 140,000 pounds

8. How much hamburger is eaten in one month?( 30 days in a month)

9. 600,000 pounds

10. Do we eat more or less than a million pounds in a year?

11. More

12. During the past decade 18,786,110 people visited New York city. Round that number to the closest million.

13. 19,000,000

14. Round 18,786,110 to the nearest thousand.

15. 18,786,000

16. In New York there are about 60 restaurants for every 10,000 visitors. About how many restaurants are there in New York City?

17. 114, 000 restaurants

18. Greater than or less than? 12,000,000 ____ 6,988,676

19. 12,000,000 > 6,988,676

20. 459,799 _____ 456,989

21. 459,759 > 456,989

22. 43,000,000,000 _____ 6 trillion

23. 43,000,000,000 < 6 trillion

24. 9 * 7 =90 * 7 =9 * 700 =

25. 63 630 6,300

26. 6 * 3 =60 * 30 =600 * 30 =

27. 18 1,800 18,000

28. Multiply 9 * 56 =

29. 504

30. Multiply 32 * 6 =

31. 192

32. Multiply 84 * 36 =

33. 3024

34. Multiply 32 * 17 =

35. 544

36. Challenge Problems: These will not be on your test, but be offered as bonus problems.(similar ones to these)

37. Use the odd digits below to make the largest possible sum. 9,8,7,6,5,4,3,2,1,0

38. Two possible answers 973 + 51 = 1024 953 + 71 = 1024 (strategy: use largest digits first)

39. Use even digits below to make the smallest possible sum. 9,8,7,6,5,4,3,2,1

40. Solution 204 - 86 = 118 (strategy: use smallest numbers first)