One of the biggest problems I see when students work with decimals is that they have trouble with the place value jumping from ones to tenths. For our entire math life, we have had a place value system that goes ones, tens, hundreds. The system continues, one thousands, ten thousands, hundred thousands, one millions, ten millions, hundred millions, and so on forever.

So why are there no oneths?
The answer may surprise you.
This means that there really is a oneths place. It is hidden in the ones place! It is like a secret agent with two identities.
So the ones, tens, and hundreds, share with the ones or oneths, tenths, and hundredths, so they both have three place value spots.
This means that the first place value after the decimal place is the tenths, and then we follow our pattern adding a th to the end of every place value.
Here are some links to look at if you are still confused:

Here are some links to practice your new skills:
Place Value Pirates

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