New
New
Year 1

# Explain that the digits in the numbers 11 to 19 express quantity

I can explain that the digits in the numbers 11 to 19 express quantity.

New
New
Year 1

# Explain that the digits in the numbers 11 to 19 express quantity

I can explain that the digits in the numbers 11 to 19 express quantity.

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## Lesson details

### Key learning points

1. The digits in the numbers 11-19 tell us about their value.
2. The teen numbers are between 10 and 20
3. The teen numbers can be represented as ten and a bit.
4. We can say there is one ten and --- ones.

### Common misconception

Pupils confuse e.g. 18 and 80 because they sound similar.

Take time to emphasise the pronunciation of the teen numbers and provide lots of opportunities for pupils to say and repeat the words. You may wish to practise the teen and decade numbers side by side so pupils can hear the difference.

### Keywords

• Teen numbers - A number made of a ten (a group of 10 ones) and some additional ones.

• Tens - A ten is a group of 10 ones.

• Ones - Individual objects, grouped in ones.

One key aspect in this lesson is the concept of a group of 10 and that a teen number can be partitioned into a ten and some additional ones. Ensure they have lots of practical experience in making and grouping 1 ten using a range of manipulatives.
Teacher tip

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Starter quiz

### 6 Questions

Q1.
What number comes next in the count? 6, 7, 8, 9 .
Q2.
What number is missing in this sequence? 6, 7, 8, 9, 10, , 12
Q3.
How many apples are there?
Q4.
How many oranges are there?
10
8
Q5.
Jun and Sofia are counting the pencils. Who is correct?
Correct answer: Sofia says, "I think there are fewer than 10 pencils."
Jun says, "I think there are more than 10 pencils."
Q6.
How many pencils are there?

## Exit quiz

### 6 Questions

Q1.
Which of these statements about teen numbers is correct?
The teen numbers come between 0 and 10
Correct answer: The teen numbers come between 10 and 20
The teen numbers come between 20 and 30
Q2.
How many apples are shown here?
Q3.
How many pencils are shown here?