1 km = 1 km
1 km =1000m
L meter =lo decimeter
1 decimeter =lo cm
Length cm:10mm
(2) Unit of measurement and rate of area: square kilometers, hectares, square meters, square decimeters and square centimeters.
1 km2 = 100 hectare
L square kilometers = 1000000 square meters
L hectares =10000m2
1 m2 = 10。 0 square decimeter
1 square decimeter = 100 square centimeter
(3) Volume measurement: cubic meter, cubic decimeter, cubic centimeter, liter and milliliter.
L cubic meter = 1000 cubic decimeter
1 cubic decimeter = 1000 cubic centimeter
1 cubic decimeter = 1 liter
1 cm3 = 1 ml.
(4) Quality unit and input rate: tons, kilograms, kilograms and grams.
1 ton = 1000 kg
1 kg = 1 kg
1 kg =1000g
(5) Time unit and forward speed: century, year, month, day, hour, minute and second.
L century = 100 year
1 year = 12 months (3 1 day includes 1, 3, 5, 7, 8, 10, 12 months, and 30 days includes 4, 6, 9,/
1 day =24 hours 1 hour =60 minutes
1 min =60 seconds