Customary Units of Length

to a smaller unit, MULTIPLY. Customary Units of Time 60 seconds = 1 minute 60 minutes = 1 hour 15 minutes = 1 quarter hour 30 minutes = 1 half hour 24 hours = 1 day 7 days = 1 week 365 days = 1 year 52 weeks = 1 year 12 months = 1 year 366 days = 1 leap year 10 years = 1 decade 100 years = 1 century A leap year occurs (almost always) every 4 th year according to these rules: 1 . Every year that is divisible by four is a leap year, 2.<br><br> UNLESS it can be divided by 100, in which case it is NOT a leap year 3. UNLESS the year is divisible by 400. Then it is a leap year.<br><br> That 9s a bit confusing, but from now until the year 2100, just r emember that any year divisible by 4 is a leap year. 2100 is NOT a leap year. second = sec minute = min month = mo hour = hr year = yr To change from a smaller unit to a larger unit, DIVIDE.<br><br> To change from a larger unit to a smaller unit, MULTIPLY. Metri c Measurement This is the system of measurement that is most commonly used in the world. Almost every country except the U.<br><br> S. used the metric system, and for many professions even in the United States, the metric system is widely used. This system is bas ed on the number 10, which makes it very easy to use.<br><br> In the metric system, the gram measures weight, the meter measures length and the liter measures capacity. Once you know these three units, you just need to know the metric prefixes and you 9re all set! Look at the chart below: Thousands Hundreds Tens Unit Tenths Hundredths Thousandths 1000 100 10 1 0.1 0.01 0.001 kilo - hecto - deca - meter gram liter deci - centi - milli - When you move from a smaller unit to the next larger unit, you just need to multi ply by 10.<br><br> So& 10 millimeters = 1 centimeter 10 centimeters = 1 decimeter 10 decimeters = 1 meter 10 meters = 1 decameter 10 decameters = 1 hectometer 10 hectometers = 1 kilometer The same is true if you replace meter with gram or liter. Most of the tim e we really don 9t talk about decimeters, decameters and hectometers. If you are working on memorizing the most important conversions, here 9s what you need to know: Length 10 millimeters = 1 centimeter 100 centimeters = 1 meter 1000 millimeters = 1 meter 1000 meters = 1 kilometer Weight 10 milligrams = 1 centigram 100 centigrams = 1 gram 1000 milligrams = 1 gram 1000 grams = 1 kilogram Capacity 10 milliliters = 1 centiliter 100 centiliters = 1 liter 1000 milliliters = 1 liter 1000 centiliters = 1 kilol iter To understand these units in terms of everyday items, think of these: A millimeter is about how thick a dime is.<br><br> A centimeter is about how wide one our fingernails is. A kilometer is a little over half of a mile. It takes about 30 grams to equal one ounce.<br><br> So a slice of cheese is about 30 grams. A kilogram is a little over two pounds. Liters are easy - we all know what a two - liter bottle of pop looks like!<br><br> Millimeter = mm Centimeter = cm Meter = m Kilometer = km Milligram = mg Gram = gm Ki lilogram = kg Milliliter = mL Liter = L Kiloliter = kL To change from a smaller unit to a larger unit, DIVIDE. To change from a larger unit to a smaller unit, MULTIPLY. <br><br>

less