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

Subtracting two-digit numbers without regrouping (example 2) | 2nd grade | Khan Academy


2m read
·Nov 11, 2024

  • I would like you to pause the video and think about what 64 minus 31 is. Alright, now let's think about this together. So what does 64 actually mean?

Well, we can use place value to think about that. The six is in the tens place and the four is in the ones place. So the six over here, that means six tens. It means six groups of ten. And so, we can visualize that right over here. Six tens: one, two, three, four, five, six groups of ten. Or another way to think about it, six tens, these are 60 boxes right over here in groups of ten.

And then we have four ones. Well, this is four ones right over here. Four ones. So this is 64. Six tens, four ones. Altogether, I have 64 boxes. Sixty of these blue ones and I have four ones. Four of these individual ones. Now I want to take away 31.

Well, what is 31? Thirty-one is three tens and one one. So let's first take away the one one. We're going to take this away; we're subtracting. We're subtracting three tens and we're subtracting one one. So let's take away that one one. And then how many ones are we left with?

Well, now we're left with three ones. So four ones minus one one is three ones. Now let's think about the tens. So I had six tens. I'm going to take away three of them. I'm going to take away three of the tens. So let's do that. Let's take away: that's one ten, two tens, and then three tens.

And so, what am I going to have left over? Well, I'm going to have left over just three tens. Just these three, these three right over here. So six tens minus three tens is three tens. And so, 64 minus 31 is 33. Three tens and three ones. Three tens: this is a group of ten, another group of ten, another group of ten. Three tens and then three ones. One, two, three.

More Articles

View All
The 5 MOST PROFITABLE Savings Accounts of 2019
What’s the guys, it’s Graham here. So I made this video about six months ago where I went over the most profitable savings accounts that you can get. Since then, in the last few months, I’ve received non-stop messages that the information is now outdated.…
10 Stocks the Smart Money is Buying Now! (Q3 2021)
So spoken about Buffett’s 13F and monitor Prabria selling Alibaba and Michael Burry ditching his options bets. But one thing I like to do at the end of 13F season is have a look at Data Roamer, which tracks 73 super investors, and just check out what stoc…
What Powers Australia?
Where does Australia get most of its, uh, electricity from? I would think like wind turbines or something, solar, wind, um, solar panels, water power. I think you have one nuclear power plant. I don’t think we have thermal yet; hydro and nuclear, don’t th…
Concrete and abstract nouns | The parts of speech | Grammar | Khan Academy
Hello Garans. So today I’d like to talk to you about the idea of concrete and abstract nouns. Before we do that, I’d like to get into some origins—some word origins or etymology. Um, so let’s take each of these words in turn. I think by digging into wha…
Introduction to lipids | High school biology | Khan Academy
What we are going to do in this video is talk a little bit about lipids. Now, a lot of times, lipids are strongly associated with fats, and that’s not incorrect. Fats are lipids, but not all lipids are fats. A better definition, or a better association fo…
Introducing Khanmigo for teachers
This is Conmigo, an AI-powered guide designed to help all students learn when subjects are giving them trouble. Conmigo can help. Kamika was fun and can transform learning into an adventure. Kanmigo is not just for students; teachers can use it too by tog…