#archaic math
- Arithmetical — An archaic or regional adjectival form used in the past as a synonym for the modern term 'arithmetic'; relating to arithmetic, based on numerical calculation or the properties of numbers and elementary operations. This structural term is found in old mathematics textbooks or historical documents to describe rules, proportions, operations, or numerical progressions.
- Arithmetically — An archaic adverbial form used with the meaning 'from an arithmetical point of view' or 'arithmetically'; in accordance with the rules and methods of elementary numerical calculation. In old texts, this structural adverb indicated how a mathematical operation, quantitative evaluation, or proportional distribution of goods was to be executed.