Double Trouble: The Great Number Rescue

Lesson Plan - Get It!

Audio:

That's right, adventurer!

You’re setting off on a double-fact adventure to solve the troll’s tricky numbers! You’ll use your take-away powers to figure out how many numbers are left after subtracting doubles.

Start with a challenge.

The Troll's Sneaky Trick

You’re walking through the magical Number Forest when you find 16 glowing stones.

Suddenly, the sneaky troll takes away 8 stones!

• How many stones do you have left?

Try stomping your feet 8 times as you count what’s left. Each stomp scares the troll away!

You did it! You have 8 stones left.

That’s because 16 take away 8 leaves you with 8.

• Guess what?

The number left is the same as the number you took away. That's the magic of double numbers.

Double numbers are like best friends; they're always the same.

• Do you like hanging out with your best friend?

Double numbers are the same way.

Watch the fun video below to learn more about double numbers.

• Did you see the pattern in the video with the double numbers?

When you remove a double number, the number left is the same.

• Are you ready to give it a try?

The Balloon Puzzle

You have 14 balloons. You give 7 balloons to your friend.

• How many balloons do you have left?

Yay! You did it.

• Did you know there’s another cool way to solve double facts?

It’s called a number line!

Watch this short video to learn how to take away using a number line.

Using a number line is like having a special treasure map to help you find your way through numbers.

You jump backward when you take away double numbers on a number line.

Number Line Kingdom Adventure

Oh no! The sneaky troll mixed up all the numbers in the Number Line Kingdom!

You must use your magic boots to hop back and fix the numbers.

• Are you ready to solve the troll's tricky puzzle with double numbers?

Awesome!

Look at the number line below.

Imagine your fingers are magic boots that help you hop back on the number line.

Your boots help you find the hidden numbers each time you hop backward.

Start at the number 12 on the number line. Hop back 6 spots.

• Which number do you land on?

That’s right, you landed on 6. Great job!

Now, use the number line to answer more questions and scare off the troll for good!

Congratulations! You did it.

You saved the Number Line Kingdom!

You’ve done a fantastic job using double numbers and the number line. These are super helpful in real life!

Imagine sharing snacks or toys with a friend. Now you know exactly how many you have left after sharing.

Head to the Got It? section to test your new skills!