This is the video for lesson 32 on my web site, Relationship Between Place Values. Let’s just review what each of these place values look like.
In the ones column, we have single digit numbers that look like this. In the 10’s column which is to the left, we have two digit numbers that look like this, 100 numbers look like that and three digits. For the 1000’s, remember that we put a comma in between the 1000’s place and the 100’s place and here’s what 10,000’s look like then 100,000’s.
Now, the key thing to take away from this lesson is that we use a base 10 math system. What that means is that as we move to the left in out place value chart, each place value is 10 times as big as the place value that’s on the right. In other words 10 is 10 times as big as one. 10,000 is 10 times as big as 1000. Now, we can look at it the other way.
As we move to the right, the place value has become 10 times as small or they become 1/10 of the size. So, if we compare the 1,000 to the 100, 100 is 10 times as small as a 1,000 or we can say that 100 is 1/10 if a 1,000. We can also skip more than place. For example, 100—well, this place which is two places to the left of the ones is a 100 times as big.
So if we go from the 100’s to the 10,000’s since we’re skipping two places, we can say that 10,000 is a 100 times as big as a 100. Make sure you see how that works. Going to the right, it's the same thing. If we compare the 1,000 to the 10 since it's two places to the right, we can say that the 10 is 100 the size of 1,000.
This may seem a little tricky but just make sure that you see it. We use a base 10 Math System. For every place that we move to the left, the number gets 10 times as big. If we go three times to the left, it would actually be a 1,000 times as big. It would be times as big, 100 and then 1,000.
Make sure that you feel comfortable with this idea. It's quite important and it will come up again and again in later math.
Transcription by:
Scribe4you Transcription Services