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Author: Admin | 2025-04-27
Metric System: The metric system is an internationally agreed decimal system of measurement created in France in 1799. The International System of Units (SI), the official system of measurement in almost every country in the world, is based upon the metric system. In the metric system, each basic type of measurement (length, weight, capacity) has one basic unit of measure (meter, gram, liter). Conversions are quickly made by multiplying or dividing by factors of 10. It is as simple as moving the decimal point to the right (for smaller prefixes) or to the left (for larger prefixes). To remember the proper movement, arrange the prefixes from largest to smallest. Kilo means thousand (1000) Hecto means hundred (100) Deca means ten (10) Deci means one-tenth (1/10) Centi means one-hundredth (1/100) Milli means one-thousandth (1/1000) Length: 1 kilometer (km) = 1000 meters 1 centimeter (cm) = .01 meter 1 millimeter = .001 meter (m) Weight: 1 kilogram (kg) = 1000 grams (g) 1 milligram (mg) = .001 gram Capacity: 1 milliliter (ml)= .001 liter (l) Conversion Ratio (or Unit Factor): A conversion ratio (or unit factor) is a ratio equal to one. This ratio carries the names of the units to be used in the conversion. It can be used for conversions within the English and Metric Systems, as well as for conversions between systems. The conversion ratio is based upon the concept of equivalent values. In the example below, 1000 meters is substituted for its equivalent measure of 1 kilometer. Proportions will help you make conversions when working with measurements. Create a unit conversion ratio, which is always equal to 1: Convert 10.25 kilometers to meters. Notice in the listing above that meter is three places to the right of the prefix kilo. This tells us to move the decimal point three places to the right. The answer is 10,250 meters. (Problem using dimensional analysis) Convert 4.5 kilometers to millimeters. 1 km = 1,000,000 mm Convert 650 mL to daL. [mL is milliliters and daL is decaliters]. Notice in the listing above that the prefix deca is four places to the left of the prefix milli. This tells us to move the decimal point four places to the left. The answer is 0.0650 daL. (Note: dL is deciliters, daL is decaliters.) Convert 750 grams to milligrams. Notice in the listing above that the prefix milli is three places to the right
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