lesson 11-7 pages 590-594 precision and significant digits
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Precision Significant digitsTRANSCRIPT
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Lesson 11-7 Pages 590-594
Precision and Significant Digits
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What you will learn!1. How to describe the
measurements using precision and significant digits.
2. How to apply precision and significant digits in problem-solving situations.
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PrecisionPrecisionSignificant digits Significant digits
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What you really need to know!
The precision of a measurement is the exactness to which a measurement is made.
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What you really need to know!
Significant digits indicate the precision of the measurement.
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What you really need to know!If a number contains a decimal point, the number of significant digits is found by counting the digits from left to right, starting with the first nonzero digit and ending with the last digit.
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What you really need to know!If a number does not contain a decimal point, the number of significant digits is found by counting the digits from left to right, starting with the first digit and ending with last nonzero digit.
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What you really need to know!When adding or subtracting measurements, the sum or difference should have the same precision as the least precise measurement.
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What you really need to know!When multiplying or dividing measurements, the product or quotient should have the same number of significant digits as the measurement with the least significant digits.
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Link to Pre-Made Lesson
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Example 1:
Identify the precision unit of the thermometer shown:
5°F
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Example 2:
Determine the number of significant digits in the measure.
MeasurementMeasurement Significant digitsSignificant digits
1,040 miles1,040 miles 330.003 cm0.003 cm 1190.051 kg90.051 kg 55
0.06300 Liter0.06300 Liter 44
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Example 3:
The sides of a quadrilateral measure 0.6m, 0.044m, 0.24m, and 0.103m. Use the correct number of significant digits to find the perimeter.
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0.60.6 110.0440.044 220.0240.024 220.1030.103 330.7710.771 PerimeterPerimeter0.8 m0.8 m 11
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Example 4:
A room is 12.25 ft wide and 14 ft long. What is the area of the room?
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Example 4:
A room is 12.25 ft wide and 14 ft long. What is the area of the room?
12.2512.25 441414 22171.5171.5 AreaArea170 ft170 ft22 22
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Page 592
Guided Practice
#’s 4-12
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Pages 590-592 with someone at home and
study examples!
Read:
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Homework: Pages 593-594
#’s 13-38 all
#’s 41-47
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Study Guide and Review
Pages
595-598
#’s 1-32(Odd answers in back of book)
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Prepare for Test!
Page
599
#’s 1-20
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Prepare for Test!
Pages
600-601
#’s 1-20
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Page
752
Lesson 11-7