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

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.

Dilating in 3D | Solid geometry | High school geometry | Khan Academy
The early Temperance movement - part 2

More Articles

View All
2015 AP Calculus AB 6a | AP Calculus AB solved exams | AP Calculus AB | Khan Academy
Consider the curve given by the equation (y^3 - xy = 2). It can be shown that the derivative of (y) with respect to (x) is equal to (\frac{y}{3y^2 - x}). All right, write an equation for the line tangent to the curve at the point ((-1, 1)). So, we could…
Harnessing the Power of Yellowstone’s Supervolcano | Podcast | Overheard at National Geographic
The apocalyptic vision of fire bursting from the earth haunts man with the image of all and nature that is beyond his control. [Music] There’s something about volcanoes that makes them the superstars of natural disasters. Magma violently forcing its way t…
Cosine equation algebraic solution set
The goal of this video is to find the solution set for the following equation: negative 6 times the cosine of 8x plus 4 is equal to 5. And like always, I encourage you to pause this video and see if you can have a go at this before we do it together. A re…
Mild and medium tension | Forces and Newton's laws of motion | Physics | Khan Academy
You bought a huge canister aluminum can of super hot red peppers, 3 Kg worth, and you hung them from two strings from the ceiling ‘cause you don’t want anyone to get your super hot red peppers. You wanted to know what’s the tension in both of these string…
15 REAL Ways to Stop Being LAZY
Procrastination: the silent killer of productivity, the thief of time, the enemy of progress. The endless cycle of putting things off until the last minute only to feel stressed and overwhelmed when the deadline approaches. It doesn’t matter if you work a…
Weird Inventions That Changed Humanity
Imagine you’re hooking up with different partners; you grow fond of some more than others, but generally, you’re having a good time. That is until your lovers start to fall ill and die. For some reason, this disease doesn’t affect you; it just kills off y…