Key term for OCR GCSE Mathematics, used in Inequalities.
A set operation meaning 'or'; it combines all elements from multiple disjoint sets into one overall solution.
Union appears in OCR GCSE Mathematics revision content for Algebra, especially Inequalities and One-Variable Inequalities.
Algebra
Inequalities • One-Variable Inequalities
Probability
Combined Events • Addition Law
Probability
Combined Events • Venn Diagrams
Number Operations and Integers
Number Theory • HCF and LCM
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