515 km = 515 x 10 dm = 5,150 dm
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1 km = 100,000 cm so 515 km = 515*100,000 = 51,500,000 cm
Assuming decimeters.... 0.0001 km Algebraic Steps / Dimensional Analysis 1 dm*1 km 10000 dm=0.0001 km
10 decimeters = 1 km. = 1000m.
10 decimeters =1 meter 10,000 decimeters =100meters which is 1/10th of a km so yes
195 kilometers is equal to 1,950,000 decimeters.