Start by measuring accurately, then just remove digits until you have the precision you want.
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To find the least precision, look for the smallest increment or smallest degree of accuracy in the measurement tool or system being used. This is usually the smallest unit of measurement that the tool can detect or the smallest change that the system can register. Identifying the least precision helps in understanding the level of detail or accuracy that can be reliably obtained from the measurement.
the precision of the least precise measuement
the precision of the least precise measuement
The precision of a calculated result based on measurements is determined by the precision of the measurements themselves. The more precise the individual measurements are, the more precise the calculated result will be. Additionally, the number of significant figures in the measurements and the mathematical operations involved also affect the final precision of the result.
The least count of a cross staff is typically around 0.5 degrees. This means that it can measure angles with a precision of about half a degree.
the precision of the least precise measuement