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Welcome To. Measures of Central Tendency. One Step Equations. Estimating and Rounding. Heuristics. Metric System. $100. $100. $100. $100. $100. $200. $200. $200. $200. $200. $300. $300. $300. $300. $300. $400. $400. $400. $400. $400. $500. $500. $500. $500. $500.

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  1. Welcome To

  2. Measures of Central Tendency One Step Equations Estimating and Rounding Heuristics Metric System $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500

  3. Estimating and Rounding for $100 Round to the tenths place: 71.349

  4. Answer 71.349 => Tenths place 71.349 => The four rounds down 71.3 Back

  5. Estimating and Rounding for $200 Estimate by rounding to the ones place: 11.49 – 5.15

  6. Answer 11.49 – 5.15 => 11 – 5 = 6 Back

  7. Estimating and Rounding for $300 Estimate using front end estimation: 9.327 + 5.72 + 4.132 = ?

  8. Answer 9.327 + 5.72 + 4.132 = ? 9.327 5.72 + 4.132 18 1.1 18 + 1.1 = 19.1 Back

  9. Estimating and Rounding for $400 Estimate using clustering: 21.2 + 20.7 + 22.1 + 20.3 + 21.1

  10. Answer 21.2 + 20.7 + 22.1 + 20.3 + 21.1 Each one is close to 21 so, 21 * 5 = 105 Back

  11. Estimating and Rounding for $500 Estimate 40.364 / 7.811 using compatible numbers

  12. Answer • 40.364 / 7.811 • 40 / 8 because these are compatible numbers (they divide evenly) • 40/8 = 5 Back

  13. Measures of Central Tendencyfor $100 Find the range: 9, 23, 5, 57, 9, 3

  14. Answer Range is largest # - smallest #, So 57 – 3 = 54 Back

  15. Measures of Central Tendencyfor $200 Find the mode: Cam, tao, dau, cam, dau, xoai, xoai, thom, tao, cam, xoai, chom chom

  16. Answer There are 2 modes: Cam and xoai each occur three times Back

  17. Measures of Central Tendencyfor $300 Find the median: 10, 23, 17, 20, 21, 5, 14, 10

  18. Answer 10, 23, 17, 20, 21, 5, 14, 10 Re-order the numbers from least to greatest: 5, 10, 10, 14, 17, 20, 21, 23 There are 2 middle numbers: 14 and 17. The mean of these 2 numbers is 31/2 = 15.5 Back

  19. Measures of Central Tendencyfor $400 Which measure of central tendency best describes the following situation? Height of buildings in district 1

  20. Answer Median Back

  21. Measures of Central Tendencyfor $500 Find the mean and the outlier(s) (if any). Describe how the outlier(s) effect the mean: 120, 97, 113, 110, 24, 107

  22. Answer 120, 97, 113, 110, 24, 107 Mean: (119+97+113+110+24+107)/6 = 95 Outlier: 24 => it is much smaller than the rest of the numbers Mean Without Outlier: (119+97+113+110+107)/5 = 109.2 The outlier decreases the mean by 14.2 Back

  23. One Step Equations for $100 Find the perimeter of a rectangle if the length is 8cm and the width is 3cm

  24. Answer Perimeter of a rectangle = 2(l+w) Length = 8cm; Width = 3cm P = 2(l+w) = 2(8cm+3cm) = 2(11cm) = 22cm Back

  25. One Step Equations $200 Solve for x: -5.2 + x = 7.1

  26. Answer -5.2 + x = 7.1 -5.2 + 5.2 + x = 7.1 + 5.2 x = 12.3 Back

  27. One Step Equations for $300 The formula for the surface area of a sphere is SA = 4(pi)r2 If the radius is 2m, what is the surface area?

  28. Answer SA = 4(pi)r2 r = 2m SA = 4(3.14)*22 = 4*3.14*4 = 16 * 3.14 = 50.24m2 Back

  29. One Step Equations for $400 Solve for x: x/(-5) = 8

  30. Answer x/(-5) = 8 x/(-5) * (-5) = 8 * (-5) X = -40 Back

  31. One Step Equations for$500 Write and solve an equation for the following situation: Madison bought 12 mangos and spent 93,000 Dong. How much did she spend on each mango?

  32. Answer Let x equal the price of each mango. Then, 12x = 93,000D So, x = 7750D Back

  33. The Metric Systemfor $100 10 grams = 1 ______

  34. Answer 10 grams = 1 dekagram Back

  35. The Metric Systemfor $200 27.92 milliliters = ____ liters

  36. 27.92 milliliters = 0.02792 liters Answer Back

  37. The Metric Systemfor $300 2.84 hectometers = ____ millimeters

  38. Answer 2.84 hectometers = 284,000 millimeters Back

  39. The Metric Systemfor $400 What is the appropriate unit of measure to estimate the capacity of a sink?

  40. Answer Liters Back

  41. The Metric Systemfor $500 Estimate the height of the classroom using appropriate units. (must be close)

  42. Answer Actual Height: 2.79 meters Back

  43. Heuristicsfor $100 Chloe stacks some blocks as shown. If she continues the pattern to 10 rows, what is the total number of blocks she will use in the 10th figure? The figure below is the 5th figure in the pattern.

  44. Answer First row is 1 block, 2nd is 2 blocks, 3rd is 3 blocks and so on. So, 10 rows would be 10+9+8+7+6+5+4+3+2+1 = 55 blocks Back

  45. Heuristicsfor $200 Beginning at 6:50 A.M., planes leave an airport for New York every 45 minutes. You arrive at the airport at 10:15 A.M. How long will you have to wait for the next plane to New York?

  46. Answer 6:50 + 45 = 7:35 + 45 = 8:20 + 45 = 9:05 + 45 = 9:50 + 45 = 10:35 10:35 – 10:15 = 20 minutes Back

  47. Heuristicsfor $300 The houses on your street are numbered with odd numbers starting with 1 and ending with 201. How many house numbers contain at least one 7?

  48. Answer From 1 – 100, the odd numbers with at least one 7 are: 7, 17, 27, 37, 47, 57, 67, 71, 73, 75, 77, 79, 87, 97 There are 14 numbers. So in 200 there would be 14*2 = 28 numbers Back

  49. Heuristicsfor $400 A dime is 1.25 mm thick. How many meters high would a stack of dimes worth $50 be?

  50. Answer There are 10 dimes in a dollar, so $50 * 10 dimes/dollar = 500 dimes 500 dimes * 1.25mm/dime = 625mm 1000mm = 1 m so, 625/1000 = 0.625m Back

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