How to Multiply Triple Digits by Double Digits

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Multiplying triple digits by double digits will require you to first line them up. Multiply triple digits by double digits with help from a professional private tutor in this free video clip.

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Video Transcript

Hi, I'm Rachel, and today we're going to be going over how to multiply triple digits by double digits. Just like when you're multiplying double digits by double digits, you want to line them up. But with triple digits, we just have one more digit. So we have a number like 326 times 54. So we line them up with the ones digit together. Even though there's no third triple digit here, that's okay, we just have blank space. So now we start with the ones digit, we start with the bottom number, the ones digit, and we multiply it by all three numbers. So we start with four times six to get 24, and then we carry the two. We do four times two is eight, we add the two to get 10. We carry the one from the 10 and we get four times three is 12 plus one is 13. So that's the first number. Now we go to the five. The important thing to remember is that you have to set a zero place in the ones digit, and you have to start one over, 'cause your starting at the second place, so you have to start here. So now we do five times six is 30, again, carry the three, change this two into a three. Five times two is 10, plus three is 13, carry the one, how perfect we already have a one here. Five times three is 15, plus one is 16. Now we line it up like so. Now that we have all these numbers, we just add them together. So you're adding the two products that you got from the four and the five multiplied. So you get four plus zero is four, zero plus zero is zero, three plus three is six, one plus six is seven and carry down the one, and you end up with you put the comma here so 17,604 is your answer. I'm Rachel and thanks for learning with us today.


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