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GCSE Mathematics · key term
An operation that reverses another operation, such as subtraction reversing addition.
Used by AQA, Edexcel and OCR
Specification N3, N14, A5 · Paper 1, Paper 2, Paper 3
An operation that reverses the effect of another operation, such as subtraction reversing addition.
Revise: Operational RelationshipsPowers and roots can also be inverse operations.
The operation that reverses another operation, such as multiplication reversing division.
Estimate before calculating, then use the inverse operation to check. A misplaced decimal point often produces an answer ten or one hundred times too large or small.
Check a completed calculation with inverse operations and, where useful, an estimate.
Do not confuse an inverse operation with changing a sign: the inverse of multiplying by 5 is dividing by 5, not multiplying by −5.
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Specification N2, N3, A5, A17 · Paper 1, Paper 2, Paper 3
An operation that reverses another operation: subtraction reverses addition, and division reverses multiplication.
An operation that reverses the effect of another operation. Addition and subtraction are inverses, as are multiplication and division.
An operation that reverses another operation, such as subtraction reversing addition or a square root reversing squaring.
A calculation that reverses another calculation, such as subtraction reversing addition.
Specification 1.04a, 6.02c, 6.03a · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
An operation that reverses the effect of another operation and returns a value to its starting value.
Revise: Checking CalculationsAn inverse operation reverses the effect of another operation.
An operation that reverses another operation; addition and subtraction are inverse operations, as are multiplication and division, and squaring and taking a square root.