Multiplying 3-digit by 2-digit numbers | Grade 5 (TX TEKS) | Khan Academy

2m read

·Nov 10, 2024

Let's get a little bit of practice multiplying numbers. So, what is 365 times 84? I encourage you to pause this video; hopefully, you have some scratch paper around, and try to calculate what this is.

All right, now let's do this together. What I like to do is, let me first write 365, and then let me write 84 right under that. But make sure that I line up the place values. So I put the eight in the tens place right under that six, and the four in the ones place right under that five.

Now I am ready to multiply. The first thing I'm going to do is I'm going to multiply 365 by 4. So, 4 times 5 is 20; I'll put the zero in the ones place, and I'll regroup that two because it's really 2 tens. So, 4 times 6 is 24 plus that two; we're really talking about 24 tens. So, plus another two tens is going to be 26 tens. I'll put six tens right over here, and then I'll regroup the two up here.

Now I have 4 times 3; it's really 4 times 300. But 4 times 3 is 12 plus those two that I just regrouped is 14. So, let me put the 14 hundreds here. Now, let me worry about this eight. Well, this eight is in the tens place; it's really 80. So, let me just put a zero here.

I start in the tens place, and let me get rid of these characters right over here so I don't confuse myself. So, 8 times 5 is 40; I'll put the zero right over here and regroup the four. 8 times 6 is 48, and then I add that four; it's going to get me to 52. Then, 8 times 3 is 24 plus 5 is going to be 29.

Now I can add everything together: 0 plus 0 is 0; 6 plus 0 is 6; 4 plus 2 is 6; 1 plus 9 is 10; put the zero here and regroup the one. 1 plus 2 is 3, and I'm done. I got 3,660.

The Meaning of Life

3d curl formula, part 2

View All

The Strangest Secret By Earl Nightingale

I’d like to tell you about The Strangest Secret in the world. Not long ago, Albert Schweitzer, the great doctor and Nobel Prize winner, was being interviewed in London. A reporter asked him, “Doctor, what’s wrong with men today?” The great doctor was sile…

How This Prawn Can Kill You - Allergies Explained

If you’re a fan of our work, you probably value rigor and humility in research and are willing to change your mind based on new information. You might also appreciate the same principles applied to important questions like: how can my donation make the bi…

How To Make A Living With NO "Job" | The Morning Toast Podcast

[Music] Can you tell us you brought us a gift. You set up this entire little moment. What is going on here? Well, today is a very special day in New York and I haven’t been to New York for over a year because of the whole COVID thing. But today my wine c…

Answering Google's Most Asked Questions of 2022

For most of Google’s relatively short existence, we’ve searched small, silly, insignificant questions - things like how to tell if a papaya is ripe. The color is almost fully yellow, and the feeling is slightly soft. Don’t forget to scoop out the seeds! S…

History of the Republican Party | American civics | US government and civics | Khan Academy

Hey Kim, hi David! So, with the Republican National Convention coming up in just a couple of weeks as we’re recording this, you thought it would be like a really good idea to sit down and examine the history of the Republican party. So, what’s going on in…

Apostrophes and plurals | The Apostrophe | Punctuation | Khan Academy

Hello grammarians! Hello David! Hello Paige! So today we’re going to talk about apostrophes and plurals. We talked about this a little bit in our introduction to the apostrophe video. This is a very, very rare case where we use an apostrophe to show that…

Multiplying 3-digit by 2-digit numbers | Grade 5 (TX TEKS) | Khan Academy

More Articles