Eleven to Fifteen

Step 1: Let's Learn

Read it, or press Listen and follow the words.

Watch the idea first — 55 seconds. Then read on, and try it yourself in the next step.

After ten comes eleven, twelve, thirteen, fourteen, fifteen.

Watch thirteen get built

Fill the first frame all the way. That is ten. Now put three more in the next frame. Ten and three more. That is thirteen.

These names are tricky

Eleven and twelve sound nothing like ten. There is no clue inside them, so they simply have to be learned.

Step 2: Try It Yourself

Tap and try it out.

Fill the first frame, then start the second.

How many13

7 more would make 20.

Counters

Thirteen is one whole rod and three more.

How many13

10 and 3 make 13.

Beads

Step 3: In Real Life

Climbing stairs

Some stairs have more than ten steps. Count each one as you climb. Eleven, twelve, thirteen. Now you can count them all.

Step 4: Watch an Example

One step at a time.

Watch Mia Reach Thirteen

Mia fills two ten frames.

Step 1
She fills the first frame completely. That is ten.
That is a full ten!
Counters10

Watch Leo Reach Fifteen

Leo fills two ten frames. Leo starts. You finish.

Step 1
Leo fills the first frame. That is ten.
That is a full ten!
Counters10

Step 5: Your Turn

Practice makes it stick.

The Buttons

Problem 1 of 13

Twelve buttons in a jar. How many buttons?

The Fish

Problem 2 of 13

Ten fish swim. Five more come. How many fish now?

fish

Into the Teens

Find the numbers past ten.

Problem 3 of 13

What comes after ten?

Problem 4 of 13

What comes after twelve?

Problem 5 of 13

What comes after fourteen?

Problem 6 of 13

Ten and four more is?

Find the Mistake

A friend counted. Can you spot the slip?

Problem 7 of 13

Sam counts. He says nine, ten, twelve. What did Sam do?

Problem 8 of 13

How many counters are there?

counters

Problem 9 of 13

Ana counts. She says four. What did Ana do?

Problem 10 of 13

How many counters are there in all?

counters

Which Way?

Pick the way that works.

Problem 11 of 13

Which way counts these counters quickly?

Problem 12 of 13

Fourteen blocks in a pile. Which way is easier to count?

Make Thirteen

Slide the beads.

Problem 13 of 13

Slide thirteen beads across.

Slide the beads.

How many0

Beads

Step 6: Quick Check

Show what you know.

Question 1 of 1

Ten and three more is?

Ready for more?Optional. Past the lesson, for anyone who wants it.

Stretch 1 of 1

Ten and some more is fifteen. How many more?

What You Learned

After ten come eleven to fifteen.
Eleven and twelve have odd names.
Thirteen is ten and three.

For the grown-up

Thirteen is really "three and ten". You can hear the three at the front if you listen for it.

Thirteen says the three first and the ten second. The number is written the other way round, with the ten first. That catches people out.

Eleven, twelve, thirteen — all of them are one full ten with some left over. The ten is always there, even when you cannot hear it.

Fill a ten frame, then start a second one. Whatever spills over is the "some more" part.