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The fifth grade mathematics unit conversion
Length:1km =1000m =10000m =100000mm =100000mm.

Area: 1 square kilometer = 100 hectare = 10000000 square meter = 10000000 square decimeter = 100000000 square centimeter = 10000000 square meter.

(Note: 1 hectare =10000m2)

Weight: 1 ton =1000kg =1000000g (note: weight and capacity are not exchangeable).

Time: one year = 365 or 366 days (generally 365 days)

1 day = 24 hours, 1 hour = 60 minutes, 1 minute = 60 seconds, 1 second = 100 milliseconds.

Coin: 1 yuan = 10 cent = 100 cent = 1000 cm.