How to Carry During Subtraction

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If you don't know how to carry properly, you'll never be able to complete subtraction problems long hand. Carry during subtraction with help from a longtime mathematics educator in this free video clip.

Part of the Video Series: Principles of Math
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Video Transcript

Hi, I'm Jimmy Chang, and we're here to talk about how to carry during subtraction. Now, carrying is very important pat of subtraction because if you don't know how to do it properly, then your answers are going to be a little bit off and than you will like. But, it's a very important procedure in the subtraction. So, let's do an example and you can see how this works. Now, when it comes to carrying, you, oftentimes it involves numbers that aren't going to be able to be subtracted to, with each other right away. So, if you have a situation where you have a 314 minus 168, the idea here is you cannot subtract eight from four, so what you have to do is when it comes to carrying, you have to borrow from the next digit over if possible. So, what ends up happening is four is going to have to borrow from the one; the one is going to end up being a zero and then, when you're borrowing, you're adding ten units. So, instead of four, it becomes 14, so that's what you're actually subtracting. So, 14 minus eight, that's going to give you six. Now, it's pretty clear cannot subtract six, so, zero is going to have to borrow from the next digit over which is going to be three. So, three is going to become a two and then, the zero is going to become ten it borrowed ten units from the previous digit. So, ten minus six is going to give you four and then lastly, two minus one is going to be one. So, when it comes to carrying during subtraction, what you want to think about is it occurs when the top digit cannot subtract by the bottom digit and it has to carry over into the next digit to be able to borrow. So, I'm Jimmy Chang and that's an illustration on how to carry during subtraction.

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