To what value should measured or calculated values be rounded?

The correct rounding approach involves using the nearest decimal or significant digit for measured or calculated values to ensure precise reporting of data. In scientific and engineering contexts, particularly within construction materials testing, the accuracy and precision of measurements are vital for reliability and compliance with standards.

Using the nearest decimal or significant digit allows for differentiation between the levels of precision inherent in the measurement. It accommodates the inherent uncertainties in measurements, enabling the meaningful representation of data without overstating the precision beyond what the measuring instruments can accurately convey.

This method aids in maintaining consistency in data recording, particularly when various measurements are taken under different conditions or with different instruments. Therefore, rounding values to the nearest decimal or significant digit supports clarity in reporting and ensures that data remains comparable and usable in further analysis.