yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Counting by tens | Counting | Early Math | Khan Academy


less than 1m read
·Nov 11, 2024

So we are told, let's count by tens, and we go 10, 20, blank, 40, 50, 60, 70, 80, 90, 000. What number did we miss? Pause the video. What number did we miss right over here? Well, if we're counting by tens, we would go 10, 20, 30, 40, 50, 60, 70, 80, 90, 100. So we're missing 30.

So which choice right over here has 30? Well, if we scroll down a little bit, we see right there that is our choice. Let's do another example. So here we are asked, which 10 frames show 20? A 10 frame is just a fancy word for one of these blocks of these frames that have 10 objects in it. You can see it right over here: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

So which of these 10 frames show 20? Well, 20 is two groups of 10. So this is 10, and then 20. So that's 20 right over there. Choice B is 10, 20, 30, 40. Choice C is 10, 20, 30. So we could feel good about choice A here.

We're told drag the 10 frames into the box to make 40. So let's see here: this is 10 right over there, then we get another 10 gets us to 20, then another 10 gets us to 30, and then finally another 10 gets us to 40. 10, 20, 30, 40. We're done.

More Articles

View All
How The Stock Exchange Works (For Dummies)
What is the Stock Exchange and how does it work? The Stock Exchange is nothing more than a giant globally network tend to organize the market place where every day huge sums of money are moved back and forth. In total over sixty trillion (60,000,000,000,0…
Proof for the meaning of Lagrange multipliers | Multivariable Calculus | Khan Academy
All right, so last video I showed you guys this really crazy fact. We have our usual setup here for this constrained optimization situation. We have a function we want to maximize, which I’m thinking of as revenues for some company; a constraint, which I’…
2002 Berkshire Hathaway Annual Meeting (Full Version)
Here but a seconder or anybody would like to speak that motion might now work their way over to the microphone in zone one. Could we have a spotlight on where there it is? And that way when we get to that point of the program, if anybody that would like t…
It’s Over: The Middle Class Is Disappearing
What’s me guys? It’s Graham here. Apparently, the middle class is quickly disappearing at an alarming rate. In fact, the situation is getting so dire that less than a year ago, Fortune stated that the middle class is bracing for its next financial blow. A…
Local and global scope | Intro to CS - Python | Khan Academy
What do you think happens when I run this program? Does it print zero, four, or raise some kind of error? To find out, let’s explore variable scope. The scope of a variable describes the region of the program where we can access it. When we run this prog…
Manifest Destiny | Period 5: 1844-1877 | AP US History | Khan Academy
This is a print showing San Francisco Harbor in 1848. There’s a little smattering of houses and a few boats in the water. It looks pretty peaceful, and it was. San Francisco only had about a thousand residents, and California had only newly become a U.S. …