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7 decimeters is equal to: 700 millimeters 70 centimeters 0.7 meters 0.07 decameters (dekameters) 0.007 hectometers 0.0007 kilometers
about the same as a yard. 39", 100cm, 10 decimeters.
There are 10 decameters in 1 hectometer. This is because the prefix "hecto-" represents 100 units, while the prefix "deca-" represents 10 units. Therefore, when converting from hectometers to decameters, you multiply by 10.
Divide decimeter by 10 and you get meters. Multiply meters by 10 and you get decimeters. 1 decimeter is 1/10 of a meter. There are 10 decimeters in a meter.
Deca is ten, or tenths (like decimal = count by tens, like December (the 10th month by the old count) So 1 meter equals 10 decimeters. And 10 meters = 1 decameter. Neither unit is used commonly.