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

Adding 2-digit numbers without regrouping 1 | Addition and subtraction | 1st grade | Khan Academy


less than 1m read
·Nov 11, 2024

  • Try to pause the video and figure out what 71 plus 24 is. All right, now let's do this together. So let's think about what 71 actually means. Well, we have a one in the ones place. Let me make this clear. So this is the ones place and we have one one. So that's that one one right over there.

And then the tens place - in the tens place we have seven, so we have seven groups of ten. One, two, three, four, five, six, seven groups of ten. So this really means seven tens and one one. This right over here, 71 boxes.

Now we're going to add to that two tens. We're gonna add to that two tens; you see them here. One ten, two tens and four ones. And four ones. So what is that going to be?

Well, let's first think about the ones. We have one one and four more ones. Well, that's going to be five ones. That's going to be five ones, so we can count them right over there. This is five ones right over there. One one plus four ones is five ones.

And then when you look at the tens; seven tens plus two tens. Well, if you combine all of these together - if you combine all of these together you are going to have nine of these groups of ten. We're gonna have nine tens.

Seven tens plus two tens is nine tens. So we're left with nine tens which we see right over here and five ones. And five ones. Well, what's another way of saying nine tens and five ones? Well, that's 95, and we're done.

More Articles

View All
What's WRONG With This Cat ?!?! IMG! #21
Every geek’s dream and a great reason to keep driving your car! It’s episode 21 of IMG. Here’s a picture of Darth Prime, and here’s Barbie as a homicidal sociopath. Not terrible enough for you? Then check out this example of bad parenting. What’s this ki…
Las Vegas isn't Las Vegas
Vegas, baby! It’s Paradise. Not metaphorically either; this literally isn’t the city of Las Vegas. Look at a map, and you’ll see the name Paradise. And when you visit and check the weather …same thing. Here is Las Vegas, and here is Paradise, which contai…
Marginal and conditional distributions | Analyzing categorical data | AP Statistics | Khan Academy
Let’s say that we are trying to understand a relationship in a classroom of 200 students between the amount of time studied and the percent correct. So, what we could do is we could set up some buckets of time studied and some buckets of percent correct. …
Our Greatest Delusion
I’m not sure what I expected to find when I went to Chernobyl. I mean, it’s been so long since the nuclear reactor there melted down and spewed radioactive atoms across the land. So for almost thirty years, this place has been virtually abandoned. These d…
How I Got $14.5 million Investment PAYDAY! | Kevin O'Leary Groove Book Acquired by Shutterfly
To a breakthrough real-life success for Shark Tank, in a first for the ABC hit show, one couple’s app invention has been acquired by a public company: a multi-million dollar deal! Wow! ABC’s Rebecca Jarvis has a story next. Into the tank is a couple with…
Credit 101: What is APR and why does it matter? | Loans and debt | Financial Literacy | Khan Academy
Let’s talk a little bit about credit, in particular how much you pay for credit. So just as a reminder, credit is essentially the ability, or when you actually borrow from someone else. It could take the form of a mortgage, where you say you’re borrowing…