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Application of Mathematical Length Unit in Grade Two
Senior two math length units: kilometers, meters, decimeters, centimeters, millimeters (in descending order)

1km= 1000m, and the rate is 1000.

1m= 10dm。 Propulsion rate: 10.

1dm= 10cm。 Yield: 10.

1cm= 10mm rate: 10.

Note: between two units of measurement of the same kind, if the higher unit is several times that of the lower unit, then this value is called the forward speed between these two units.

Large and Small Units: Multiplication Rate

Small unit to large unit: division rate