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# Suppose a worm is 7.9 millimeters long. How many centimeters is this?

Student

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Suppose a worm is 7.9 millimeters long. How many centimeters is this?

Posted by daimarys5 on January 21, 2009 at 5:55 AM via web and tagged with math, metric measure

College Teacher

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The Metric System is based on powers of ten, with the meter being the standard length. Going smaller than a meter, a tenth of a meter is a decimeter, a tenth of a decimeter is a centimeter, a tenth of a centimeter is a millimeter. So a millimeter is a thousandth of a meter, a centimeter is a hundredth of a meter, and a decimeter is a tenth of a meter.   Since it takes ten millimeters to make a centimeter, something 7.9 millimeters is .79 centimeters, or .079 decimeters, or .0079 meters.

Posted by enotechris on January 21, 2009 at 7:43 AM (Answer #1)

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1 millimeter (mm) equals to about one-tenth of a centimeter (cm), which is 10^-1, according to the metric scale.

1mm= 0.1cm

Then,

7.9mm= 0.1*7.9

= 0.79 cm

Posted by revolution on July 24, 2010 at 11:02 PM (Answer #3)

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