19.4 Appropriate Tools and Units (p.428-431)

Precision

• Being very exact and accurate and able reproduce the same measurement over and over again
• Here would be an example of less to more precise units of measurement: miles, yards, feet, inches, 1/2 inches, 1/4 inches... The smaller the unit of measure used, the more precise the measurement.

Try this ruler game from rsinnovative.com to check your understanding of measuring in customary units (inches)