Ten and some more

Make and take apart eleven through nineteen using one ten.

Paper packet. Every task here also exists on screen, where it is checked automatically; answers written on paper are not assessed by Nydus. When you are back at a device, enter your answers there.

1. What you will learn

Connect a teen collection, a full ten-frame and its written numeral.

2. Place words

Term	What it means
teen number	One of eleven through nineteen.
extra ones	The ones outside the full ten.

3. A ten is ten ones

Fill every place in a ten-frame. You have ten ones. Put four more counters outside it. Count on: eleven, twelve, thirteen, fourteen. Write 14 for the whole amount. The 1 stands for the full ten; the 4 tells about the extra ones.

Another way: picture

A full ten-frame with ten counters, followed by four extra counters outside the frame.

Ten counters fill the frame; four counters stand outside it.

4. Take it apart and rebuild

Remove the four extra counters from fourteen. The ten stays full. Put them back and fourteen returns. Writing 41 would describe a different amount; digit order matters. Eleven and twelve have special names, but each still contains a ten and extra ones. Nineteen has nine extras. One more would fill a second ten, making twenty, which is no longer a teen number.

5. Build sixteen.

Make the full ten.
10 ones
The ten-frame must be completely full.
Add six outside it.
10 + 6 = 16
Six extra ones complete sixteen.

6. Take twelve apart.

Keep the full ten.
10
A teen contains one full ten.
Your turn: work this step out. Its working is at the end of the packet.
Count what is outside.

7. Guided practice

Write the extra ones.

16 = 10 + _o

Audio transcript: None

8. Guided practice

One full ten and 3 extra ones make which number?

Answer:

9. Practice

Pack these counters in tens. How many full tens and extra ones?

●●●●●●●●●●●●●●●●●

Groups of 10: Left over:

Audio transcript: None

10. Somewhere new

Match each new label to its ten and extra ones.

	10 + 1	10 + 2	10 + 3
11
12
13

Audio transcript: None

11. Lesson test

Lesson test: one question per skill, one attempt each, no hints. Your answers are checked when you submit.

12. Test question

One full ten and 1 extra ones make which number?

Answer:

13. What you can do now

Show fourteen as one ten and extra ones. What does each digit tell you?

Working for the steps left to you

6. Take twelve apart., step 2

2; 12 = 10 + 2

The remaining two are extra ones.