Presentation on theme: "System of Measurement English – standard measurement in the United States, now called U.S. Customary System Uses, inch, foot, yard, rod and mile as units."— Presentation transcript:
1 System of MeasurementEnglish – standard measurement in the United States, now called U.S. Customary SystemUses, inch, foot, yard, rod and mile as units12 inches in a foot3 feet in a yard16 ½ feet in a rod5,280 foot in a mile
2 customary measurement system A measurement system that measures length in inches, feet, yards, and milescapacity in fluid ounces cups, pints,quarts, and gallonsweight in ounces, pounds, and tonsand temperature indegrees Fahrenheit
4 System of MeasurementMetric System – used for scientific work in the United StatesMeasurements are based on the meter1 Meter = 100 centimeters (cm)1 Meter = 1,000 millimeters (mm)1000 Meters = a Kilometer (km)Units are in multiples of 10
5 Converting Customary Units There are 2 basic rules to use when converting in the customary system.When going from a known smaller unitto an unknown larger unit,divide.320 oz = poundsIn this example we know the oz is the smaller unit. We divide 320 by 16 (the number of oz in 1 pound)knownunknown320 / 16 = 20 pounds
6 When going from a known larger unit to an unknown smaller unit, multiply. 3 c = fl ozknownunknownIn this example we know the number of cups is the larger unit. We multiply 12 (the number of fl oz in 1 cup) by 3 cups3 x 12 = 36 fl oz
7 Inch as a Unit of Measurement Traditional unit for woodworking and metalworkingSome fine rulers or scales have 32 marks per inch.Most rulers have 16 marks per inch with each mark equaling 1/16 of an inch.
9 How To Read a Ruler Identify how many marks there are to an inch. Measure item and count how many marks past a whole number.Reduce to least common denominator
10 Reading a RulerHow many marks are there to an inch on this ruler?16
11 Reading a Ruler Locate the marks for 1”, 2”, 3” and 4” Inch marks are the longest, usually the number is located under or to one side of the line.
12 Reading a RulerLook at the lengths of the lines to determine measurement.The longest line is for a whole number 1Next longest line is for 1 /2Next longest line is for 1 / 4 and 3 / 4Next longest line is for 1 / 8, 3 / 8, 5 / 8 and 7 / 8Remaining lines are 1/16, 3/16, 5/16, 7/16, 9/19, 11/16, 13/16, 15/16
13 Reading A RulerThe Letter A represents what measurement?1 inch
14 ONLINE PRACTICE http://www.rickyspears.com/rulergame/