innumerate 復習

　I used to long to be a child again. Not any more. British children seem under perpetual assault from the three horsemen of the apocalypse: obesity, social media and the manic gods of examination. Of these the most needless, and clearly dangerous, is the exam. The signs of stress are blatant. …
　A primary-school child of my acquaintance can handle counting and proportion, but he cannot access the world of complex numbers and algebra. In every way a lively, intelligent, creative boy, he is innumerate. For this harmless failing, he is accused of lowering his class score and his school league place. He dreads going to school. (Skip the rest)

https://www.google.co.jp/amp/s/amp.theguardian.com/commentisfree/2018/jun/15/schools-children-education-exams-maths-rankings-obsession

　今回取り上げる語は、innumerate /ɪn(j)úːmərət/ です。文脈から “he is innumerate” を「彼は勉強ができない」と訳を推測しました。以下で意味等を確認していきます。　
　まず意味を Cambridge Dictionary でみると、“unable to understand and use numbers in calculations” とあり、LDOCE には “unable to do simple calculations or understand basic mathematics” と定義されていました。
　次に語源を ONLINE ETYMOLOGY DICTIONARY でみると、“"unacquainted with the basic principles of mathematics," 1959, based on illiterate, with Latin numerus "a number" (see number (n.)). Related: Innumeracy. とありました。
　以上のことから、innumerate は「簡単な計算ができない」という意味を持つことがわかりました。(OkaUchi)