Raisin Estimation

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Raisin Estimation

  1. 1. Organizing and Displaying Data
  2. 2. Mental Math Reflexes <ul><li>10+10 </li></ul><ul><li>30+13 </li></ul><ul><li>175+426 </li></ul>
  3. 3. Mental Math Reflexes <ul><li>12+10 </li></ul><ul><li>40+56 </li></ul><ul><li>238+546 </li></ul>
  4. 4. Mental Math Reflexes <ul><li>15+10 </li></ul><ul><li>24+61 </li></ul><ul><li>693+168 </li></ul>
  5. 5. Math <ul><li>Guess how many raisins are in the box. Write your guess on your record sheet. </li></ul><ul><li>When you’re finished, share your guess with your group. </li></ul>
  6. 6. In this lesson… <ul><li>You will gather, guess, estimate, organize, and summarize data on the number of raisins in the box. </li></ul>
  7. 7. <ul><li>Count the number of raisins on the top. Use that number to estimate the number of raisins in the entire box. </li></ul><ul><li>Write your estimate on your record sheet. </li></ul>
  8. 8. <ul><li>Guess vs. Estimate </li></ul>
  9. 9. <ul><li>Empty the box of raisins and count them. </li></ul><ul><li>Count twice to double check. </li></ul><ul><li>Write your answer on your record sheet. </li></ul>
  10. 10. <ul><li>What was your counting strategy? </li></ul>
  11. 11. <ul><li>How many raisins did you count? </li></ul>
  12. 12. <ul><li>Let’s organize our data using a line plot! </li></ul>
  13. 13. Landmarks
  14. 14. Landmarks <ul><li>Maximum—The largest number </li></ul><ul><li>Minimum—The smallest number </li></ul><ul><li>Range– The difference between the Maximum and the Minimum </li></ul><ul><li>Mode—The most frequent number </li></ul>
  15. 15. What am I talking about? <ul><li>“ Way out by itself” </li></ul><ul><li>“ The smallest numbers” </li></ul><ul><li>“ Big clump” </li></ul><ul><li>“ The table has some holes.” </li></ul>
  16. 16. Finally… <ul><li>What would you say is the typical number of raisins in a box of raisins? </li></ul>

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