How to explain 100 less than in 100 more or less to your child: Example question for 11+ / Section B: 100 less than
29 October 2026
Understanding what '100 less than' means helps children build confidence with numbers. This skill is useful for quick mental maths and recognising patterns in place value.
Worked example
What is 100 less than 540?
Start with 540.
Take away 100: 540 - 100.
540 - 100 = 440.
The correct answer is 440.
After seeing this worked example, your child will be able to spot when a question is asking for 100 less than a number. They can now try similar questions to practise this idea and get comfortable with the method.
