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Contributor: Stefani Allegretti. Lesson ID: 14096
Are you ready to go on a fun, under-the-sea adventure with numbers? Get ready to learn about place value and how it helps to add nine to any number less than ten!
It is time for a fun, under-the-sea adventure with numbers!
On this adventure, you will use place value to add jewels, seashells, and more to your treasure chest!
Imagine a treasure chest full of numbers.
You can use place value to unlock the key to adding nine to any number less than ten!
Wow!
First, pretend you have five sparkly jewels in your treasure chest, and you want to add nine more.
You can use place value to make it easier!
Instead of counting all those jewels one by one, use place value to solve the problem.
Make a ten, of course!
You have five jewels in your treasure chest. You need to add nine more.
So first, make a ten!
Look at the picture below.
Five!
Add five jewels to the five already in your treasure chest.
Now, you have ten jewels in there!
Wow! That's a lot of jewels!
Next, add the four jewels you have left.
14 jewels all together!
So, 5 + 9 = 14!
That is awesome!
Watch this fun video about place value!
Now, practice adding nine to another number less than ten.
Time to go back under the sea and collect seashells!
You have two seashells in your treasure chest, and you are adding nine more.
Make a ten!
Eight!
Add eight seashells to the two in your treasure chest.
Now you have ten seashells!
Next, add the one seashell you have left.
11 seashells!
So, 2 + 9 = 11!
Using place value can make adding nine to any number easier and faster!
Awesome work, math adventurer!
Now, dive into the Got It? section for more adventures!
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