Multiplying & Dividing Deciamls!

By: Riley Grippo

Multiplying Decimals

Decimals can be used in many diffrent ways, one of them is multiplying! It's very easy to multiply decimals, because you don't have to line them up. What I do is pretend the decimals aren't there. So instead of 3.45 x 4.8, I think of it like 345 x 48. Then after that, you multiply the numbers. Now you're probably asking "What are we going to do with the decimal?" Well that's exactly what I'm going to teach you next! So what do is get you're answer from the probem, and count to the right of the number to the left how many numbers are behind the decimals from the numbers you're mulitplying.

If you're still confused go to the bottom of the page for a video!

Dividing Deciamls

Like I said from before deciamls can be used in many different ways, and one of them is dividing! There are two ways to divide decimals, both are: both divisor, and dividend are decimals, and the other is when the dividend only has a decimal. The first way I'm going to teach you is when only the dividend has a decimal. Again when I divide I like to pretend to the decimal isn't there. So then what you're going to do is divide like normal. After that, you're going to add the decimal to your quotient, so how you're going to do that is you're going to bring up you're decimal, and wherever its placed on the quotient that's where it goes. Now, for the other way, which is when both dividend, and divisor have decimals. This is the same thing as the other way, but just with extra steps. There's actually one thing you need to know, the divisor doesn't like to be a decimal. So what you're going to do to change that is move the decimal to the right, but there's is a catch to doing that. If you're going to move the decimal to the right on the divisor, you're going to have to do that for the dividend as well. After you do that you can divide just like you did before, and when you're done with that you're going to add the decimal the same also.

If you're still confused go to the bottom for a video!

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