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Junior Vilas Boas · Answer 1 · 2017-03-15T03:31:00+0000

there are 450 decimeters in 4.5 kilometers, because there are 100 decimeters in 1 kilometer, so when you convert 4.5 kilometers into decimeters, it get multiplied by 100.

4.5×100=450

answer=450 decimeters
hope i helped...............

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