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Year 1

Ordering numbers 11- 20 practically

You can compare and order numbers 11-20 practically.

New
New
Year 1

Ordering numbers 11- 20 practically

You can compare and order numbers 11-20 practically.

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Lesson details

Key learning points

  1. Understand numbers to 20 in the ordinal context, as part of a number track or line.
  2. Use the language of first second and third to order numbers and sets of objects to 20.

Common misconception

You can't compare and order numbers that are not next to each other in the counting sequence.

Start with numbers close together in the counting sequence and move on to numbers with a larger gap.

Keywords

  • First - The smallest of the values.

  • Second - The middle value of a set of three.

  • Third - The largest of the values.

Start by comparing numbers of object in a set and move on to the language that allows us to say that 15 is greater than 12 even if we are not labelling a set. We are saying that 15 ones is greater than 12 ones.
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).

Video

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6 Questions

Q1.
How many robots are there in this picture?
An image in a quiz
Correct Answer: 15, fifteen, 15, 15
Q2.
If we count on 4 places, what number do we finish on?
An image in a quiz
Correct answer: 13
12
11
14
Q3.
Match the numbers with their spellings.
Correct Answer:10,ten

ten

Correct Answer:11,eleven

eleven

Correct Answer:12,twelve

twelve

Correct Answer:13,thirteen

thirteen

Correct Answer:14,fourteen

fourteen

Q4.
Which number is missing from the middle bead string?
An image in a quiz
Correct Answer: 7, 7, 7 , seven
Q5.
From left to right, (A to B) are we counting backwards, or counting forward?
An image in a quiz
Correct answer: backwards
forward
Q6.
Which of these is a correct comparative sentence for the numbers 7 and 8?
7 is one greater than 8
8 is one fewer than 7
Correct answer: 8 is one more than 7
7 is one more than 8

6 Questions

Q1.
Put these in the right order to count backwards from 20.
1 - 20
2 - 19
3 - 18
4 - 17
5 - 16
6 - 15
Q2.
Match the sentences so that they are all true.
Correct Answer:20 is one more than ,19

19

Correct Answer:19 is one less than ,20

20

Correct Answer:fifteen is equal to ,15

15

Correct Answer:nine is one greater than ,8

8

Correct Answer:4 is one fewer than,5

5

Q3.
Order these numbers counting up to 20.
1 - 15
2 - 16
3 - 17
4 - 18
5 - 19
6 - 20
Q4.
Order these numbers counting up to twenty.
1 - fifteen
2 - sixteen
3 - seventeen
4 - eighteen
5 - nineteen
6 - twenty
Q5.
Which number is missing on the second bead string?
An image in a quiz
Correct answer: 18
17
16
19
Q6.
Is the number of robots more, equal to, or less than 15?
An image in a quiz
Correct answer: More than 15
Less than 15
Equal to 15

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