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Multiplying and Dividing decimals

This week in 5th grade math, we are working on Multiplying and dividing decimals.

Multiplying decimals is very similar to regular multiplication of multi-digit numbers.

Step 1: Ignore the decimals in the numbers and multiply like normal.

2.8           would look like this          28

x   7                                                 x   7

Step 2: Count how many places are to the right of the decimal

Step 3: Then move the decimal the number of places in your answer.

Try This!  Learn Zillion will help you understand how to multiply decimals using  a model.  Click on the word Learn Zillion below to access this information.  When the page comes up, select that you are a student at the top of the page.  Then the video will play.   If you have any questions, just call or email me kcrawford@polk.k12.ga.us.

Learn Zillion

Dividing decimals

Dividing decimals is a little different.  We still incorporate the standard algorithm's steps, but we also have to move our decimals to the correct places.