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## 4th grade

### Unit 2: Lesson 2

Adding multi-digit numbers# Adding multi-digit numbers: 48,029+233,930

CCSS.Math:

Add 48,029+233,930 using the standard algorithm.

## Want to join the conversation?

- What we're going to do in this video is add 48,029 to 233,930. And like always, pause this video, and I really encourage you to try to figure it out on your own, and let's see if we get the same answer. And if we don't, why? Alright, so the way I'm going to tackle this, I assume that you've had a go at it, I'm going to take the larger number. I'm going to write it on top. I'm really doing the standard method. There's multiple ways where you can add multi-digit numbers, but what I'm going to do is really the most typical method. And then I'm going to write the smaller number below it, but I'm going to match up the place value. So I'm going to write the ones place in the same column as the ones place on the top number. So this is the 10,000s place, so 48,029. So nine ones is zero ones, two tens, three tens, so on and so forth. And now I am ready to add. So let's start in the ones place. And if I'm adding numbers, it's always a good idea to start in the ones place. Zero ones plus nine ones is nine ones. Then I can go into the tens place. Three tens plus two tens is five tens. This is going well, alright. Then I go to the hundreds place. Nine hundreds plus zero hundreds, well, that's just going to be nine hundreds. So far, so good. Alright, now something interesting is going to happen in the thousands place. Three thousands plus eight thousands, well, that would be 11 thousands. But we can rewrite 11 thousands as 1000 and one 10000 sometimes you might see this described as carrying the one. Three plus eight is 11 where you carry the one. But all you're really doing is regrouping. 3000 plus 8000 is 11000, we write the 1000 here and we write the 10000 right over there, the 10000 place. And now so we have one 10000 plus three 10000s plus four 10000s so one plus three plus four that's eight 10000s or 80000. And then last but not least we have these two hundred thousands right over there and we're done. 281,959 did you get the same answer?(20 votes)
- The transcript is already provided. Click on the "transcript" tab next to the "about".(8 votes)

- What does 48,029+233,930=?(6 votes)
- Here's a method you would probably understand more for example do this with any big numbers you have that you have to add

48,029

+233,930

=281,959

Basiclly always just add the top and bottom number and if you get a number bigger than 10 then carry it onto the next one for example if i had 488 + 434 at first i would add the ones place first and get 12 and so the i would put a 2 in the ones place and carry the 1 so the 1 would be on top on the 8 in the tens place and then we basically add that 1 onto the addition of 8 + 4 and the it would turn into 9 + 4 because were adding the 1(6 votes)

- why dont you have to put the bigger nuber at the top when you are doing an addtion problem(4 votes)
- In addition, it does not matter which number you put at the top. It only matters in subtraction(5 votes)

- Could you possibly use another method than the standard method? I didn't understand why he only showed us standard.(4 votes)
- you can use something other than standard. sal was just showing us that,

incase that was better(3 votes)

- im not use to adding big number like 769,235 + 896,230(4 votes)
- yeah you your right(3 votes)

- i wanna do it but it wont let me(4 votes)
- What do you mean you can not do it?(2 votes)

- how you put the bigger number on top(2 votes)
- Re-arrange the numbers. For example, 1,000 + 500. You re-arrange it to be stacked. With the 1,000 on top. Then you add, Getting you 1500, or 1,500.(5 votes)

- i got the same answer :/(4 votes)
- WHY does he draw circles at1:38.(3 votes)
- Sal draws circles to show he is adding the 2 quantities. Often when doing multidigit addition people get messed up so drawing circles eliminates room for error especially in beginners.(3 votes)

- 0:14"and if we dont, why?" (does not explain) (i think)(3 votes)

## Video transcript

- [Instructor] What we're
going to do in this video is add 48,029 to 233,930. And like always, pause this
video, and I really encourage you to try to figure it out on your own, and let's see if we get the same answer. And if we don't, why? Alright, so the way I'm
going to tackle this, I assume that you've had a go at it, I'm going to take the larger number. I'm going to write it on top. I'm really doing the standard method. There's multiple ways where you
can add multi-digit numbers, but what I'm going to do is
really the most typical method. And then I'm going to write
the smaller number below it, but I'm going to match up the place value. So I'm going to write the ones place in the same column as the
ones place on the top number. So this is the 10,000s place, so 48,029. So nine ones is zero ones,
two tens, three tens, so on and so forth. And now I am ready to add. So let's start in the ones place. And if I'm adding numbers, it's always a good idea to
start in the ones place. Zero ones plus nine ones is nine ones. Then I can go into the tens place. Three tens plus two tens is five tens. This is going well, alright. Then I go to the hundreds place. Nine hundreds plus zero hundreds, well, that's just going
to be nine hundreds. So far, so good. Alright, now something
interesting is going to happen in the thousands place. Three thousands plus eight thousands, well, that would be 11 thousands. But we can rewrite 11
thousands as 1000 and one 10000 sometimes you might see this
described as carrying the one. Three plus eight is 11
where you carry the one. But all you're really doing is regrouping. 3000 plus 8000 is 11000, we
write the 1000 here and we write the 10000 right over
there, the 10000 place. And now so we have one 10000
plus three 10000s plus four 10000s so one plus three
plus four that's eight 10000s or 80000. And then last but not least
we have these two hundred thousands right over there and we're done. 281,959 did you get the same answer?