Session 1 Exercise

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1. He came to see us for 10 minutes, and left at 3 o'clock.
2. Use figures to write the following number: 5 billion, 703 million, 5 thousand.
3. If 72813654 is written as 72 81 36 54, explain why it is easy to tell that this number is divisible by the digit 9.
4. Read the numbers: 48,530,000; 39,037,602,385; 9,402,061.
5. Find the average of 150, 245, 410, and 1,296.
6. What is 6,671,873 rounded to the nearest hundred thousand: 6,600,000 or 6,700,000?
7. To solve the problem, do we "add 300," or do we "take away 300"?
8. How many minutes are there in a 24-hour day?
9. Is the answer 36-or 37-cents a dozen?
10. Write the largest 3-digit, 4-digit, and 5-digit numbers you know
11. Tell the meaning of each of the following signs: +, -, X, , , ±, , + -, - +.
12. If 5 + 10 equals 15, what does 10 + 5 equal?
13. Add or subtract as the signs tell you: 6942 + 3819; 294,107 + 365,904; 10,259 - 7386; 362 -41.
14. Instead of using the symbol "x" to indicate multiplication, we can use a dot"" . For example, 37 x 52 can be expressed as 3752. Use the dot to write 19 x 17.
15. What is 1157?
16. What is 100010?
17. What are the least and greatest values of 4±1, 400±10, 61, 60010?
18. What does 50 -+ 5 means
19. If 5 + 10 =15, then does 15-10 =5?
20. Is 16 > 9?
21. Is 6 + 3 < 7?
22. Are 5 : 2, 10 : 4, and 15 : 16 equivalent ratios?
23. The odds are 10-to-1 against winning. What does this mean in terms of dollars?
24. From the table, tell which scores are included in the intervals 0-9, 15-19, and 40-49.
25. Think: "9 and 9 are 18," and "2 more are 20."
26. Is "30 + 5" another name for 35?
27. In 1948, '49, and '50, the average rainfall was 24.0, 23.1. and 64.0. What was the total rainfall for the 3 years?
28. From the data, what is the difference in growth between the 5-10 and the 15-20-year groups?
29. Bob practiced from 9:45-11:30. How many minutes did he practice?
30. What is the sum of -119 and -67?
31. Does -459 =-5?
32. A proper divisor of -42 is ±2. Is 2 a proper divisor?
33. What is the value of 0.02? of 0.002? of 0.0025?
34. Round .469 to the nearest hundredth. Is your answer .46, or is it .47?
35. Are the following sentences true or false: .04 > .039: .305 <.34?
36. What is ".6 x 7.25"? Would you have to multiply again to find "7.25 x .6"? Does 4.350 .6 = 7.25? Does 4.3507.25 = .6?
37. Name the hundredths from .01-.25.
38. Which point is farther from zero: -.5 or -5?
39. Find the point labeled "-.75."
40. The sign read "Candy bars-6 for 29¢." Jim bought 12 candy bars. How much change did he receive from $1.00?
41. What does $.75 - $.52 equal?
42. What is 50% of $120?
43. 55 is what % of 100?
44. Does 5'7" + 2'9" = 8'4"?
45. Carl, Carol, and ...are part of the set. Bob and ... are not.
46. 16 + 420 =
47. 1 + 3 + ... + ... + 81 + 243 = 364
48. 25¢ + 50¢ = ...¢
49. 100 times _____ is 3400.
50. $1.28 + 4.39 + 6.75 =$_____
51. 25=____% of 100
52. The opposite of multiplication is ....., and the opposite of addition is .....
53. 1, 3, 5,..., 9, ....
54. .432 - .0087 =
55. 51,858 ? = 402
56. 36,000,000 = 3.6 x -?
57. 1435 x 6 = 86??
58. 100 ? 35 =3500
59. 1,354 ? 52 = 1,406 .
60. 006 ? .002 =.003
61. -10 ? -8
62. Mathematical sentences use signs such as +'s or ='s
63. What is 102? Are there 5 2s in 10? Are there 2 5s in 10?
64. Find the sum of the 1st seven terms of the sequence 3, ____6, 12,.......
65. Which terms in the sequence above are 1st, 2nd, 3rd?