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the prefix "kilo" means 1000. So there are 1000 grams in a kilogram. The prefix "milli" means 1/1000. So there are 1000 milligrams in a gram. so in 4.5 kilograms there are 4500 grams (4.5 x 1000) and in 4500 grams there are 4,500,000 milligrams (4500 x 1000)

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13y ago

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