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Application of measuring devices and units of measurement
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Application of measuring devices and units of measurement
Appropriate measuring devices and metric conversions; Estimation, approximation and significant figures; Absolute/percentage error and tolerances; Scientific notation
Example 1
A length is 4.4cm to the nearest 0.1cm. What is the maximum possible absolute rounding error, in cm?
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Answer: 0.05
- Half the recording unit is 0.05cm.
Example 2
Convert 4.25 metres to millimetres.
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Answer: 4250
- Multiply metres by 1000 to obtain millimetres.
Example 3
Write 6×103+4×102 as an ordinary number.
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Answer: 6400
- Evaluate the place-value contributions and add them.
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