Presentation on theme: "Answer these questions about the English system:"— Presentation transcript:
1 Answer these questions about the English system: Why metrics?Answer these questions about the English system:How many fluid ounces are there in one gallon?How many cups are in a quart?How many inches are in a mile?How many teaspoons are there in one tablespoon?
2 Metric System Base 10 easy to use Prefixes and base units are all you need to know
3 The Prefixes Kilo (k) 1000 x the base Hecto (h) 100 x the base Deca (da) 10 x the baseNo prefix = just the base!Deci (d) 0.1 x the base 1/10Centi (c) 0.01 x base 1/100Milli (m) x the base 1/1000You MUST know these!
4 The Base units Distance = meter (m) Volume = liter (L) Mass (weight) = gram (g)Temperature = Kelvin (K) but we use oCThere are other but for this class these will work
5 How to make sense of the metric system The first letter is the prefixThe second letter is the base unitIf there is only one letter you are in your base unit.
6 km Prefix (k) Base unit (m) m tells us we are measuring distance “meters”K means Kilo“1000”km means 1000 meters5km can be read 5 “thousand” “meters” (k) (m)
7 You already use a base 10 system every day… (Americans just don’t use the prefixes right)Would you rather have 25 dollars or 25 centidollars?Would you rather have a kilodollar or a dollar?
8 How many jumps does it take? Ladder MethodKILO (k) 1000HECTO (h) 100DEKA (da) 10DECI (d) 0.1CENTI (c) 0.01MILLI (m) 0.001Meters Liters GramsHow do you use the “ladder” method?4 km = _________ mStarting PointEnding Point1st – Determine your starting point.2nd – Count the “jumps” to your ending point.3rd – Move the decimal the same number of jumps in the same direction.How many jumps does it take?4.__.__.__.= 4000 m123
9 Examples Convert the following: 2.0 m to cm 15 cm to m 1.5 km to m 4500 m to km
10 2.0 m to cm (move two places right) 15 cm to m (move two places left) 1.5 km to m (move three places right)1500m4500 m to km (move three places left)4.5km