New
New
Year 1
Using bar models to subtract
I can use bar models to represent and solve subtraction problems.
New
New
Year 1
Using bar models to subtract
I can use bar models to represent and solve subtraction problems.
Lesson details
Key learning points
- A bar model can be used to represent subtraction problems and equations.
- Overlaying manipulatives on a bar model can be useful for helping to solve subtraction problems and equations.
Common misconception
Children may muddle the order of the numbers on a bar model and in a subtraction equation.
If children are not secure, then return to the concrete to secure understanding of this structure of subtraction.
Keywords
Subtract - To separate or take away one number from another, or to decrease an amount.
Offer opportunities for children to manipulate bar models (made with Cuisenaire rods or cut up pieces of card) to deepen their understanding of the partitioning structure of subtraction.
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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Starter quiz
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6 Questions
Q1.
Look at the equation 8 – 2 = 6 Which number represents the part to be subtracted from the whole?
Q2.
Match the word to the correct description for 10 - 3 = 7.
total number in the whole group
part to be subtracted
part that remains
Q3.
Tick the equation that correctly matches the picture.
8 - 1 = 9
1 - 8 = 9
Q4.
Which picture matches this equation? 10 – 3 = 7
Q5.
Jun has written an equation to represent the picture 5 - 1 = 4 Is the equation correct or incorrect?
incorrect
Q6.
Complete the equation 9 – 5 =
Exit quiz
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6 Questions
Q1.
Which bar model has a whole of 6?
Q2.
Which bar model represents this picture?
Q3.
Tick the equation that represents this bar model.
5 - 3 = 8
8 = 5 - 3
Q4.
Which bar model cannot represent this equation? 7 – 3 = 4
Q5.
Tick the subtraction equations that match the bar model.
7 - 3 = 10
3 - 10 = 7
Q6.
Which story could be represented by this bar model?
There are 7 apples. 3 of them are red. How many are not red?