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Splash Screen. Example 9-5b. Objective. Analyze measurement. Example 9-5b. Vocabulary. Precision. The precision of a measurement depends on the unit of measure. The smaller the unit, the more precise the measurement is. Example 9-5b. Vocabulary. Significant digits.

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  1. Splash Screen

  2. Example 9-5b Objective Analyze measurement

  3. Example 9-5b Vocabulary Precision The precision of a measurement depends on the unit of measure. The smaller the unit, the more precise the measurement is

  4. Example 9-5b Vocabulary Significant digits All of the digits of a measurement that are known to be accurate plus one estimated digit zeros between the last non-digit number and the decimal are not significant 150. zeros to the right of the decimal are significant 150.00

  5. Lesson 9 Contents Example 1Identify Precision Units Example 2Identify Significant Digits Example 3Identify Significant Digits Example 4Add Measurements Example 5Multiply Measurements

  6. Example 9-1a Identify the precision unit of the thermometer. Precision is the smallest unit of measurement used Look at the scale between 0 and 10 There are 5 has marks 10  5 Answer: Divide 10 by 5 2 degrees Add dimensional analysis

  7. Answer: inch Example 9-1b Identify the precision unit of the ruler.

  8. Example 9-2a Determine the number of significant digits in the measure 5,000 feet. Write the number 5,000 Zeros between the last non-digit number and the decimal are not significant There are 3 zeros between the last non-digit number and the decimal so they are not significant 1 significant digit Answer:

  9. Example 9-2a Determine the number of significant digits in the measure 30,080 feet. Answer: 4 significant digits

  10. Example 9-2b Determine the number of significant digits in the measure 21.0 miles. Write the number 21.0 Zeros to the right of the decimal are significant Answer: 3 significant digits

  11. Example 9-2b Determine the number of significant digits in the measure 4,700.00 miles. Answer: 6 significant digits

  12. Example 9-3a Determine the number of significant digits in the measure 315.05 ounces. Write the number 315.05 3 significant digits to the left of the decimal 2 significant digits to the right of the decimal Answer: 5 significant digits

  13. Example 9-3b Determine the number of significant digits in the measure 35.006 centimeters. Answer: 5 significant digits

  14. Example 9-4a MAIL Venita took four packages to the post office. They weighed 1.27 pounds, 3.45 pounds, 0.524 pound, and 2.7 pounds. Write the combined weight of her mail using correct precision. Write numbers lining up the decimals 2 decimal places 1.27 3.45 Add (use calculator) 2 decimal places 3 decimal places 0.524 Find the number with the least decimal places 1 decimal place 7.944 Write answer with 1 decimal place Answer: 7.9 pounds

  15. Example 9-4b DELI Veric bought 1.5 pounds of turkey, 0.75 pound of roast beef, 2.4 pounds of ham, and 0.5 pound of salami. Write the combined weight of the lunch meat that Veric bought using correct precision. Answer: 5.2 lb

  16. Example 9-5a Use the correct number of significant digits to find the volume of the cylinder. V =   (4.125 in )2  3.5 in Write formula for volume of cylinder V =   17.0156 in2  3.5 in Replace r with 4.125 in Replace h with 3.5 in Follow order of operations P E MD AS Evaluate (4.125)2

  17. Example 9-5a Use the correct number of significant digits to find the volume of the cylinder. V =   (4.125 in )2  3.5 in Multiply numbers V =   17.0156 in2  3.5 in Multiply units in3 Determine number with the least significant digits V = 187.0965 . . . Answer: 3.5 has 2 significant digits, so round answer to 2 significant digits V = 190 in3

  18. Example 9-5b * Use the correct number of significant digits to find the volume of the rectangular prism. Answer:

  19. End of Lesson 9 Assignment

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