WEBVTT mathematics/basic-math/pyo
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Welcome back to Educator.com; this lesson is on units of measurement.
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We are going to look at the different types of measurement, starting with length.
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To see how long something is, we have different measurements.
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1 foot we know is 12 inches; 1 yard is equal to 3 feet.
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1 mile is equal to 5280 feet.
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Using this, we can convert from foot to inches, yards to inches to feet, and so on.
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Also for length, we have meters; 1 meter is equal to 100 centimeters.
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It is also equal to 1000 millimeters; 1000 meters is equal to 1 kilometer.
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The key here in converting is... you should know all of these.
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But it is also to determine which measurements are larger, which ones are smaller than the others.
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Right here, centi means 100; but it means small 100.
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That means to make up 1 meter, it takes 100 centimeters.
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If I said that this is 1 meter, then it takes a lot of centimeters, 100 centimeters, to make up 1 meter.
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We know that the meter is bigger than the centimeter; centi means 100.
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Anytime you have anything with centi, it just means 100, but in a small way.
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They are very small.
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Same thing, 1 meter, it also takes 1000 millimeters to make up 1 meter.
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Milli means 1000, but in a small way also.
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It takes 1000 of these very small units to make up 1 meter.
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Kilo also means 1000, but in a big way.
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That means it takes 1000 meters to make up 1 kilometer.
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We know kilometer is bigger than the meters because it takes 1000 of these to make up 1 of those.
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Let's go over the next one, mass, which is looking at weigh, how heavy something is.
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1 pound is the same as 16 ounces; 1 ton is equal to 2000 pounds.
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Depending on what you are weighing, you are going to use these different measurements.
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If you are going to weigh something that is really, really light, then you are probably going to use ounces.
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Pounds we know.
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Tons would be something very heavy; like maybe a car or something that is pretty large, pretty heavy.
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Kilogram which is kg; remember kilo; kilo means 1000, but in a big way.
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It takes 1000 grams to make 1 kilogram.
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A kilogram, again, anything with kilo means 1000; that is also used for mass.
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For liquid, 1 gallon is the same as 4 quarts.
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1 quart is the same as 2 pints; 1 of those is the same as 2 cups.
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For this, there is... let's look at this.
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I am going to show you an easy way to remember these.
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I am going to write a G for gallon; let me write this part over.
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Let's see; I have a G like that; G for gallon; this is 1 gallon.
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Then since 1 gallon is equal to 4 quarts, I am going to write 4 Qs in here.
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1, 2, 3, 4; that means 4 quarts; 4 Qs is equal to 1 gallon.
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Within the Qs, I am going to write 2 Ps because I know that 2 pints is equal to 1 quart.
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Here is P, P, P, P, P, and then there we go.
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I have 2 Ps within 1 quart, 1 Q.
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Then 1 pint is equal to 2 cups.
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Within each P, I am going to write 2 Cs.
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We know G is for gallon, Q is for quarts, P is for pints, C is for cups.
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If I ask you how many pints are in 1 gallon,
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you can just count how many Ps there are within the G for the gallon.
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1, 2, 3, 4, 5, 6, 7, 8; there are 8 pints in 1 gallon.
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What if I ask you how many pints are in 2 quarts?
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You are going to count all the Ps within 2 Qs.
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It is 1, 2, 3, 4.
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How many cups are in 1 quart?
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1, 2, 3, 4; there is 4 Cs in 1 Q.
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You can just use this to help you when it comes to the liquid measurements.
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When we convert these, if I want to convert meters into centimeters,
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first of all I have to know the measurement of 1 meter equals how many centimeters?
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Centi meant 100, but in a small way.
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I know that 100 centimeters equals 1 meter.
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I am just going to write that below here; 1 meter equals 100 centimeters.
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This is just an easy way to do this.
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We are going to probably cover this again when we go over proportions and that chapter.
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But for now, you can just write this below here just to help you.
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From meter, 1 meter was the same as 100 centimeters.
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To get from 1 to this, you multiplied by what?--by 10; multiplied by 10.
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In the same way, I have to take 100.
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Then multiply it by 10 to get how many centimeters is going to be equal to 10 meters.
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Whenever I take this number and multiply it by 10,
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there is just one 0 for 10 so I can just add a 0 there at the end of it.
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It is going to be 1000; 100 times 10 is 1000.
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I know that 10 meters is the same as 1000 centimeters.
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Quarts to cups; if you don't remember how many cups is equal to the pints and the quarts,
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you can just draw your G and then use that as a reference.
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Let me just write that out just so you guys can see it.
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Remember I had 4 Qs; within each Q, I had 2 Ps.
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Within each P, I had 2 Cs.
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1 quart, 1 Q, how many cups do I have?
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I have 4Cs; I have 4 cups; 1 quart is the same as 4 cups.
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Yards to inches; I know that 1 yard is equal to 3 feet.
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1 yard is equal to 3 feet; 1 feet is equal to 12 inches.
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If I want to go from yards to inches, since I know that 1 yard is 3 feet
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and only 1 of these is equal to 12 inches,
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to get from here to here or from here to here, you multiplied by 3.
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Then if I want to go from inches to yards, I have to multiply by 3.
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12 times 3 is 36; 1 yard is equal to 36 inches.
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I know this seems a little confusing.
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But I just know that I have the top and the bottom.
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To get from 1 to 3, you have to multiply by 3.
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You have to multiply this side also by 3 to get back to the yards.
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1 feet is equal to 12 inches; 3 feet is going to be 36 inches.
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3 feet is the same thing as 1 yard.
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So you can look at it that way.
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Ounces to pounds; I know that 16 ounces is equal to 1 pound.
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How did you get from 16 to 8?
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Once these are the same, you can just convert it back over.
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To get from 16 to 8, I divided by 2.
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I have to also take this number and divide by 2.
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I have to do the same thing to both sides.
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1 divided by 2 is 1/2; this means 1 divided by 2.
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1/2 is the same thing as 1 divided by 2.
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8 ounces is half a pound.
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Few more; 2 yards equals how many feet?
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I know that 1 yard equals 3 feet.
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Again I have yard to yard, feet to feet.
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To go from 1 to 2, I multiplied by 2.
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Then I have to do the same thing on this side.
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Multiply by 2; take this number; times 2 is 6.
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2 yards is the same as 6 feet.
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Now 8 quarts to how many pints?
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1 quart equal to 2 pints; 1 quart is equal to 2 pints.
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Again I have quarts to quarts and pints to pints.
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How do I go from 1 to 8?--you multiply.
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It is always going to be multiplication or division.
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You are not going to add 7 to get 8.
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You don't do plus and minus; you are going to do times and divide.
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1 times 8 is 8; then I need to multiply this by 8 which is 16.
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8 quarts is equal to 16 pints.
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Let's do a couple more; 1 gallon equals how many pints?
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You can draw your G again.
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Let's draw a big G so you guys can look at it, G for gallon.
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I know that 4 quarts equals a gallon; you just draw this over.
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Within each quart, there are 2 pints.
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Since I am only going up to pints, I am not using cups.
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I don't have to draw the Cs in there.
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Within 1 G, how many Ps do I see?
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I see 1, 2, 3, 4, 5, 6, 7, 8.
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In 1 gallon, there are 8 pints.
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Then 2 kilometers equals how many meters?
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Remember kilo means 1000 in a big way.
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I know that there is going to be a lot more meters than kilometers
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because since kilometers are big, it means 1000 in a big way,
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there has to be more meters to make up for the kilometer.
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1 kilometer equals 1000 meters.
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Again this is kilometer to kilometer and meters to meters.
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I can just go ahead and see what I multiplied this by.
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1 times 2 equals 2.
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You have to multiply this by 2 to get the 2 kilometers.
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You are going to do the same thing on this side.
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You have to also multiply by 2; take this number; 1000 times 2 is 2000.
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2 kilometers is 2000 meters.
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If you need to, go back to the beginning of this lesson and review over the different units of measurement.
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Try to get yourself familiar with all of them.
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That is it for this lesson on units of measurement.
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Thank you for watching Educator.com.