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Transparency 1. Click the mouse button or press the Space Bar to display the answers. Splash Screen. Example 1-6b. Objective. Estimate percents by using fractions and decimals. Example 1-6b. Vocabulary. None. Lesson 1 Contents. Example 1 Use Fractions to Estimate

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  1. Transparency 1 Click the mouse button or press the Space Bar to display the answers.

  2. Splash Screen

  3. Example 1-6b Objective Estimate percents by using fractions and decimals

  4. Example 1-6b Vocabulary None

  5. Lesson 1 Contents Example 1Use Fractions to Estimate Example 2Use Fractions to Estimate Example 3Estimate by Using 10% Example 4Percents Greater Than 100 or Less Than 1 Example 5Percents Greater Than 100 or Less Than 1 Example 6Estimate Percent to Solve a Problem

  6. Example 1-1a Write the problem Remember: When directions say to “estimate” the exact answer will be wrong Estimate 61% of 407 61% of 407 Round 61% to an easy number  60% 400 “of” refers to multiplication 6  4 Round 407 to an easy number 000 . 24 Multiply non-zero numbers Bring down zeros Answer:  240 Remove % sign by dividing by 100 (move decimal 2 places to the left) 1/6

  7. Example 1-1b Estimate 28% of 92. Answer: 27 1/6

  8. Example 1-2a Write the problem Remember: When directions say to “estimate” the exact answer will be wrong Estimate 18% of 296 18% of 296 Round 18% to an easy number  20% 300 “of” refers to multiplication 2  3 Round 296 to an easy number . 000 6 Multiply non-zero numbers Bring down zeros  60 Answer: Remove % sign by dividing by 100 (move decimal 2 places to the left) 2/6

  9. Example 1-2b Estimate 71% of 198. Answer:  140 2/6

  10. Example 1-3a Write the problem Remember: When directions say to “estimate” the exact answer will be wrong Estimate 59% of 500 59% of 500 Round 59% to an easy number  60% 500 “of” refers to multiplication 6  5 500 is already an easy number 30 000 . Multiply non-zero numbers Bring down zeros  300 Answer: Remove % sign by dividing by 100 (move decimal 2 places to the left) 3/6

  11. Example 1-3b Estimate 39% of 700 Answer:  280 3/6

  12. Example 1-4a Write the problem Remember: When directions say to “estimate” the exact answer will be wrong Estimate 173% of 60 173% of 60 Round 173% to an easy number 170%  60 “of” refers to multiplication 17  6 60 is already an easy number 102 00 . Multiply non-zero numbers Bring down zeros Answer:  102 Remove % sign by dividing by 100 (move decimal 2 places to the left) 4/6

  13. Example 1-4b Estimate 142% of 80. Answer:  112 4/6

  14. Example 1-5a Write the problem Remember: When directions say to “estimate” the exact answer will be wrong of 898 Keep as is 900  “of” refers to multiplication Round 898 to number compatible with 3 the denominator  9 3 00 Multiply non-zero numbers Bring down zeros 5/6

  15. Example 1-5a Remove % sign by dividing by 100 (move decimal 2 places to the left) of 898 900   9 . 3 00 Answer:  3 5/6

  16. Example 1-5b Answer:  2 5/6

  17. Example 1-6a GAME ATTENDANCELast season 96,081 people were in attendance at a college football game. About 0.25% of those were reporters from newspapers and television and radio stations. About how many media people were present? Write the problem 0.25% of 96,081 Round 0.25% to an easy number 0.3% 96,000  “of” refers to multiplication Round 96,081 to an easy number 6/6

  18. Example 1-6a GAME ATTENDANCELast season 96,081 people were in attendance at a college football game. About 0.25% of those were reporters from newspapers and television and radio stations. About how many media people were present? Multiply non-zero numbers Bring down zeros 0.25% of 96,081 Remove % sign by dividing by 100 (move decimal 2 places to the left) 0.3% 96,000  3  96 Remove decimal in 0.3 by moving the decimal 1 more place to left 288 . 000 people Answer: Add dimensional analysis 288 6/6

  19. Example 1-6b * CONCERT The attendance at a popular outdoor concert was recorded as 6,973. Of those attending, 0.5% were security personnel. About how many security people were present? Answer:  35 6/6

  20. End of Lesson 1 Assignment

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