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The kilo- prefix means 1000

The milli- prefix means 1/1000 = 0.001

→ ½ km = 0.5 × 1000 m = 500 m

→ 370 mm = 370 × 0.001 m = 0.37 m

→ difference between ½ km and 370 mm is 500 m - 0.37 m = 499.63 m

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8y ago

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