Calculate the difference
I can calculate the difference and find pairs that have the same difference.
Calculate the difference
I can calculate the difference and find pairs that have the same difference.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- When comparing numbers, we can look at the difference between them.
- The difference between two numbers has a value.
- The difference can be shown as a bar model.
- Difference can be calculated as subtraction.
- Different pairs of numbers can have the same difference.
Keywords
Difference - The result of subtracting one number from another. Way in which two or more things we are comparing are not the same.
Same - Way in which two or more things we are comparing are like each other.
Subtraction - To partition one part from another (the subtrahend from the difference), or to decrease an amount by taking an amount away.
Common misconception
Recording a subtraction to show difference incorrectly e.g. knowing that the difference between 4 and 6 is 2, but recording this as 4 - 6 = 2
Stress we can compare 6 to 4 or 4 to 6, but remind children that subtraction is not commutative so the whole (/ the larger number of those being compared) has to be written first in the expression. We can however change the position of the = symbol.
Licence
Lesson video
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Starter quiz
6 Questions
3
5
8
0
2
Number of pencils
Numbers of pens
Difference between the number of pencils and the number of pens
Exit quiz
6 Questions
5
6
7
8