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Composition of numbers 11 to 19

Composition of numbers 11 to 19

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Why this why now

This unit introduces two-digit numbers between 10 and 20, rehearsing the counting sequence and beginning to explore two-digit place value, building on the counting pattern to 100 in earlier units. Here pupils will represent 2-digit numbers in different ways to show the composition of ten and a bit. Number facts to ten will be applied within 20 and doubling to ten will be extended to 20.

Prior knowledge requirements

  • Count and represent numbers to 10
  • Partition numbers into tens and ones
  • Use number bonds to build teen numbers

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Why this why now

This unit introduces two-digit numbers between 10 and 20, rehearsing the counting sequence and beginning to explore two-digit place value, building on the counting pattern to 100 in earlier units. Here pupils will represent 2-digit numbers in different ways to show the composition of ten and a bit. Number facts to ten will be applied within 20 and doubling to ten will be extended to 20.

Prior knowledge requirements

  • Count and represent numbers to 10
  • Partition numbers into tens and ones
  • Use number bonds to build teen numbers

Composition of numbers 11 to 19

In this unit pupils will explain 11-19 as cardinal and ordinal numbers. They will double and halve numbers 6-9 and use addition and subtraction facts to add and subtract within 20.

10 lessons in unit

  1. 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.
  2. 2

    Explain that the digits in the numbers 11 to 19 express position on a number line

    I can explain that the digits in the numbers 11 to 19 express position on a number line.
  3. 3

    Identify the quantity shown in a representation of numbers 11 to 19

    I can identify the quantity shown in a representation of numbers 11 to 19
  4. 4

    Use knowledge of 10 and a bit to solve problems

    I can use my knowledge of 10 and a bit to solve problems.
  5. 5

    Solve subtraction problems using knowledge of 10 and a bit

    I can solve subtraction problems using knowledge of 10 and a bit in different contexts.
  6. 6

    Explore odd and even numbers within 20

    I can explore odd and even numbers within 20.
  7. 7

    Double the numbers 6 to 9 and halve the result explaining what doubling and halving is

    I can double the numbers 6 to 9 and halve the result explaining what doubling and halving is.
  8. 8

    Use knowledge of addition facts within 10 to add within 20

    I can use knowledge of addition facts within 10 to add within 20
  9. 9

    Use knowledge of subtraction facts within 10 to subtract within 20

    I can use knowledge of subtraction facts within 10 to subtract within 20
  10. 10

    Use knowledge of addition and subtraction facts within 10 to add and subtract within 20

    I can use knowledge of addition and subtraction facts within 10 to add and subtract within 20

Learn how you can make the best use of Oak resources

A step-by-step guide to getting started

Get more out of Oak