New
New
Subtract multiples of powers of 10 crossing the millions boundary
I can subtract multiples of powers of 10 crossing the millions boundary.
Lesson 6 of 10
New
New
- Year 6
Subtract multiples of powers of 10 crossing the millions boundary
I can subtract multiples of powers of 10 crossing the millions boundary.
Lesson details
Key learning points
- Powers of 10 and their multiples can be subtracted using the language of unitising.
- Known facts can be used alongside unitising to subtract powers of 10 and their multiples.
- Subtraction of powers of 10 and their multiples can be represented on a number line.
Keywords
Million - One million is composed of one thousand thousands. 1,000 × 1,000 = 1,000,000 We write one million as a one followed by six zeros.
Unitise - When we unitise, we treat groups that contain, or represent, the same numbers of things as ‘units’ or ‘ones’.
Power of 10 - A power of 10 is when 10 is multiplied by itself a certain number of times.
Common misconception
Children may struggle with the language of unitising.
Encourage children to read aloud and spot what they notice - which known fact can they see - what is the same/different?
Children need to be secure with known number facts to 20 to ensure they can unitise successfully minimising overload. Children need to be aware of the structure: if one part remains the same but the whole increases by an amount then the difference will increase by the same amount.
Teacher tip
Licence
This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Match the equation to the correct difference.
Match the equation to the correct difference.
Q2.1,700 − = 900
1,700 − = 900
Q3.Match the number word to its numeral.
Match the number word to its numeral.
Q4.Complete: 1,603,690 − 400,000 =
Complete: 1,603,690 − 400,000 =
Q5.Aisha and Lucas play a game. Lucas wins 800 points and Aisha wins 4,200 points. How many more points does Aisha have?
Aisha and Lucas play a game. Lucas wins 800 points and Aisha wins 4,200 points. How many more points does Aisha have?
Q6.Lucas thinks of a number. His number is 600 less than 9,200 what is the number that he is thinking of?
Lucas thinks of a number. His number is 600 less than 9,200 what is the number that he is thinking of?
Assessment exit quiz
6 Questions
Q1.Match the subtraction equations to the difference.
Match the subtraction equations to the difference.
Q2.6,300,000 − 800,000 =
6,300,000 − 800,000 =
Q3.Match the subtraction equation to the correct difference.
Match the subtraction equation to the correct difference.
Q4.7,000,000 − 50,000 =
7,000,000 − 50,000 =
Q5.Aisha is thinking of a number. Her number is 500,000 less than 3,200,000 What number is she thinking of?
Aisha is thinking of a number. Her number is 500,000 less than 3,200,000 What number is she thinking of?
3,150,000
3,250,000
3,700,000
Q6.Lucas has scored 5,000,000 points during his computer game. He then gets captured and loses seventy thousand points. How many points does he have now?
Lucas has scored 5,000,000 points during his computer game. He then gets captured and loses seventy thousand points. How many points does he have now?
5,070,000
5,700,000
4,300,000
