Measuring length - Customary Units
Use a inch leader to measure the length of real world objects to the nearest inch and half inch.
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A ruler or measure up tape deserve to be supplied to measure lengths in both metric and customary units. Here, the leader is significant in centimeters (cms) along the top and in inches follow me the bottom.
The clues or intervals top top a leader are called hash marks.
To measure up the length of one object, location the zero hash mark of the ruler specifically along one end of the object. Align the object you space measuring follow me the sheet of the ruler. Note the hashmark ~ above the ruler along i beg your pardon the various other side of the object ends.
Here, the shoelace is 17.6cms lengthy in metric systems of length, and 7 inches long in customary systems of length.
Reading a Ruler:
Reading Centimeters and Millimeters: A centimeter is smaller than one inch. The long hash marks under i m sorry numbers room written ~ above the ruler denote centimeters.
A millimeter is even smaller than a centimeter. The smaller hash marks in between each centimeter represent millimeters.
10-millimeter hash marks make 1 centimeter.
Reading Inches: An inch is bigger than a centimeter. The big long hash marks above which numbers are written ~ above the opposite next of the centimeter ruler denote inches.
fun FactsThe oldest preserved ruler is a copper alloy rod from c.2650 BCE, discovered by a German excavator while excavating at Nippur.A leader is likewise called a rule.
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Let"s execute it!
Give your boy sticks or ribbons of various measures. Ask lock to usage the leader correctly and also note the length of every in both metric (cms/mms) and also customary systems (inches).