Ordinal numbers show the position of an object in relation to another | Maths

Starter quiz

What mistake has Andeep made in his count?

He said the wrong total. ✓

He counted backwards.
Who has counted the cakes correctly?

Andeep

Laura ✓
Match the number words to the numbers.

1

⇔

one ✓

2

⇔

two ✓

3

⇔

three ✓

4

⇔

four ✓

5

⇔

five ✓
Which set has 5 objects?

Set 1

Set 2

Set 3 ✓
Andeep thinks there are 5 cars in the line. Is he correct?

Yes ✓

No
Laura thinks there are 5 cars in the line. Is she correct?

Yes

No ✓

What can an ordinal number tell us?

The total amount in a set.

The position of an object in a set in relation to something else. ✓
Which one of these in an ordinal number?

One

Two

First ✓
Match the ordinal number to the word that represents it.

1st

⇔

first ✓

2nd

⇔

second ✓

3rd

⇔

third ✓

4th

⇔

fourth ✓

5th

⇔

fifth ✓
Who is first in the line to go through the door?

Andeep ✓

Sam

Laura
Who is fifth in the line to go through the door?

Andeep

Sam

Laura ✓
Who is correct?

Andeep ✓

Laura

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Ordinal numbers indicate a single item or event rather than a quantity.
Review how ordinal numbers are named and represented and show the shortened written names.
Ordinal numbers contain part or all of the corresponding number words. First and second are exceptions.
The difference between cardinal and ordinal numbers is the difference between quantity and position.

Children may confuse ordinal and cardinal numbers.

Place an emphasis on these numbers in speech throughout the day. Continue to highlight the links between them.

Ordinal number - A number that tells the position of something in relation to something else.
Cardinal number - A number that shows how many of something there are.
First to fifth - Ordinal numbers that describe the position of something.