Composition and calculation: multiples of 1,000 up to 1,000,000

Spine 1: Number, Addition and Subtraction – Topic 1.26

Primary KS2 Year 5
Mastery PD Materials


Explore the composition of six-digit, whole-thousand numbers, using the partitioning structure; apply knowledge and strategies from segments 1.17 and 1.18 combined with unitising in 1,000s, as well as column methods and rounding.

Teaching points

  • Teaching point 1: Understanding of numbers composed of hundred thousands, ten thousands and one thousands can be supported by making links to numbers composed of hundreds, tens and ones.
  • Teaching point 2: Multiples of 1,000 up to 1,000,000 can be placed in the linear number system by drawing on knowledge of the place of numbers up to 1,000 in the linear number system.
  • Teaching point 3: Numbers can be ordered and compared using knowledge of their composition and of their place in the linear number system.
  • Teaching point 4: Calculation approaches for numbers up to 1,000 can be applied to multiples of 1,000 up to 1,000,000.
  • Teaching point 5: Numbers can be rounded to simplify calculations or to indicate approximate sizes.
  • Teaching point 6: Known patterns can be used to divide 10,000 and 100,000 into two, four and five equal parts. These units are commonly used in graphing and measures.