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# Multi-digit addition with regrouping

Sal adds multi-digit numbers like 9367 and 2459 using an understanding of place value. Created by Sal Khan.

## Want to join the conversation?

• at around 30 secs. how do you remember the method?
• If you keep doing it and watching the video you get used to it
• Why do you carry?
• Because you need to move the place value over. So if you have 11. you put another 1 in the tens column and 1 in the ones! Hope this helps!
• could he do a problem in the quadrillions? a quadrillion is this big:1,000,000,000,000,000.
• Yes.

9, 576, 725, 936, 756, 243+ 2, 677, 364, 689, 746 or any other number

It might take a while, but you are just adding more numbers so its possible.
• When we have to carry over a number, do we also have to carry over the other numbers as well?
• While working on complicated addition problems involving three or more digits, just carry one digit at a time, from right to left.
• how can I make this more easy?
• I'm not sure if there is an easier method of adding numbers. I looked for a bit on Google. This is the method I learned, it may just take more time and practice to get faster and good at it. Focus on accuracy first speed will come later.
(1 vote)
• What is a prime number?
• an integer that has no factors but itself and 1
• Why do we carry?
• to get the answer like if you have 33\$ plus 7\$ it is 30 without borrowing that is missing 10 bucks.
(1 vote)
• how am i supposed to carry these numbers over?