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Measurement and units


Anything that has mass and takes up space


An indication of how close a measurement is to the true value


An indication of the scale on the measuring device that was used

1 cubic centimeter

1 millimeter

A digit within a number is considered to be a significant figure if:

- it is non-zero OR
- it is a zero that is between two significant figures OR
- it is a zero at the end of the number and to the right of the decimal point

Significant figures when adding and subtracting

Round your answer so it has the same precision as the least precise measurement

Significant figures when multiplying or dividing

Round your answer so that it has the same number of significant figures as the measurement with the fewest number of significant figures


An object's mass divided by the volume that the object occupies
p = m/V

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