Acalculia

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

Acalculia is an acquired impairment in which people have difficulty performing simple mathematical tasks, such as adding, subtracting, multiplying, and even simply stating which of two numbers is larger. The condition has substantial negative impact on the wellbeing and independence of those affected.

Excerpt from the Wikipedia article “Acalculia”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: CanonLawJunkie, Public domain, via Wikimedia Commons.