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CUSTOMARY SYSTEM OF MEASUREMENT

Measurements are approximations of lengths. First, we’ll look at measuring to the nearest 16th of an inch when given a ruler divided into 8ths. Sixteenths fall on the eighths and also between the eighths. For example: 3/8ths is the same as 6/16ths; 4/8ths is the same as 8/16ths. The sixteenth that falls halfway between 3/8ths and 4/8ths is 7/16ths. We will estimate to the nearest sixteenth using our knowledge of eighths and knowing that some sixteenths fall halfway between the eighths on the ruler.

After estimating to the nearest sixteenths with a ruler marked in eighths, we’ll look at measuring to the nearest 16th using a rule divided into sixteenths.

The customary units of measurement are used in the United States. Units of measurement may be expressed in larger or smaller equivalent units. We’ll examine a conversion chart of customary units and ways to convert within the customary measurement system. First we’ll look at converting customary units of length, weight, and capacity.

Customary units of area are used in everyday life such as measuring carpet or surveying land. We will look at a chart of customary units of area and how to convert area measurements into equivalent areas measurements of a different unit.

Softened concrete is sold in cubic yards. Cubic yards are a customary unit of volume. We’ll examine a chart of customary units of volume and how to convert volume measurements into equivalent volume measurements of a different unit.