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By Year 5, pupils solve bigger addition and subtraction problems with confidence. They use written methods, mental strategies, and checking skills to ensure their answers are accurate.
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Fascinating Fact:
You can check subtraction by using addition: if 4,328 - 2,157 = 2,171, then 2,171 + 2,157 = 4,328.
In KS2 Maths, Year 5 pupils develop accuracy with larger numbers. They practise both mental and written strategies, and learn to use inverse operations to check their work.
Key Terms
Inverse: An opposite operation, such as addition being the inverse of subtraction.
Written Method: A structured way of setting out calculations, like the column method.
Mental Strategy: Using quick thinking and number facts to solve a problem without writing it down.
Frequently Asked Questions (Click to see answers)
How can I check my subtraction answers?
You can add the answer to the smaller number. If it equals the starting number, your subtraction is correct.
What is the best method for large numbers?
The column method is usually best for large numbers because it keeps place value clear and reduces mistakes.
Why do we learn mental strategies as well as written ones?
Mental strategies are useful for quick checks and everyday situations, while written methods are reliable for bigger or more complex problems.