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.

What The Recession Will Do To Russians | Meet Kevin

Hunted in the Arctic | Edge of the Unknown on Disney+

View All

Worked example: Solving equations by completing the square | High School Math | Khan Academy

So let’s see if we can solve this quadratic equation right over here: (x^2 - 2x - 8 = 0). And actually, they’re cutting down some trees outside, so my apologies if you hear some chopping of trees. Well, I’ll try to ignore it myself. All right, so back, …

Gerrymandering | US government and civics | US government and civics | Khan Academy

What we see here are two maps of congressional districts. On the left, we see some congressional districts in and around Austin, Texas. This black line shows us Travis County, where Austin, Texas, is. On this right map, we see the congressional districts …

They Turn Ice Into Ice Cubes | Continent 7: Antarctica

[Music] The Coast Guard Cutter Polar Star is the most powerful icebreaker in the world. Our mission is to cut a channel that’s 18 miles long through 8 to 12 feet of ice so that the supply ships can resupply the continent. This is where we earn our money. …

SEO Advice from SurveyMonkey Director of SEO and Growth, Eli Schwartz

All righty, let’s jump right into it. So, first question: Does SEO still matter in 2018 or can companies ignore it and focus on other channels? This is a question I get asked a lot, and I’ve been asked this question in many years past. Sometimes, the quo…

15 Billionaire Beliefs That Made Them Billionaires

Sure. Okay. Luck, location, and timing play an enormous part in the outcome. But we’ve been deconstructing billionaires for over a decade now, and the amount of overlap in the way their brain works is crazy. Here are 15 ways billionaires think differently…

This Journal Keeps Me Productive (& Maybe You Too)

This is the theme system journal. It’s something I helped design for me and maybe for you to help improve my life in a practical way. It’s a very flexible tool; there are intentionally almost no labels of what has to go where, so it can be adaptable. But …

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

More Articles