Metric Units of Length Convert mm cm m and km

Welcome to Math with Mr. In this video, we're going to convert metric units of length. And we're specifically going to be working with millimeters, centimeters, meters, and kilometers. Now, our base unit of length for the metric system is meter. So, everything's going to be based off meter, and we're going to use prefixes to create other units of length. And those prefixes will tell us what those units of length mean in comparison to that meter. Okay, so for example, millimeter, milli, the prefix milli, means 1 1,000th of meter. So, it takes 1,000 to equal 1 Centimeter, the prefix centi, means 1 100th of meter. So, it takes 100 cm to equal 1 And lastly, we have kilometer, and the prefix kilo means 1,000. So, it takes 1,000 to equal kilometer. And all those notes are right here up top, and we can reference those as we go through the conversions. Now, as point of reference here, so we know little bit about what these units of length mean and represent, millimeter is about the thickness of paperclip. So, it's very small unit of length. Not how long that paperclip is, but how thick it is. centimeter is about how wide the average pinky is, or how wide staple is. And on most rulers, centimeters will be marked on the metric portion of that ruler. and then meter is little over yard. So, meter stick little longer than yard. And then kilometer is little over half mile. So, kilometers are used to measure long distances. So, let's get into some conversions here. In number one, we have 3 equals how many centimeters? Well, 1 is 100 cm. So, we have three. 100, 100, 100. And whenever we go to meters to centimeters, we multiply by 100. So, 3 equals 300 cm. Next, we have 10 equals how many centimeters? So, again, meters to centimeters, multiply by 100. Each one of those meters is 100 cm, and we have 10 of them. So, let's multiply, and we get 10 * 100 = 1,000 cm. Number three, 9 km equals how many meters? Well, in 1 km, there's 1,000 And we have nine of them. The So, 1,000 1,000 1,000 nine times, or nine times 1,000. So, when we go kilometer to meter, we multiply by 1,000. And for this one specifically, we get 9,000. Number four, 400 cm equals how many meters? Well, each meter, there's 100 cm. So, we need to take that 400 and split it into groups of 100. Each one of those groups of 100 equals meter. So, we need to do 400, divide it into groups of 100 or meters there, and we end up with four. So, centimeter to meter, divide by 100. Number five, millimeters to centimeters. So, there are 10 in every centimeter. So, we need to divide by 10, or split into groups of 10. Each one of those 10s is centimeter. So, 50 / 10 gives us 5 cm. So, millimeters to centimeters, divide by 10. Number six, 8,000 equals how many meters? Well, there's 1,000 in every meter. So, we need to split that 8,000 into groups of 1,000. Each one of those thousands is 1 So, millimeters to meters, divide by 1,000, and we get 8 All right, so there's there you have it. There are some basic conversions within metric units of length, specifically millimeters, centimeters, meters, and kilometers. Thanks so much for watching. Until next time, peace.