THREE R'S


Meaning of THREE R'S in English

[three R's] n pl [fr. the facetiously used phrase reading, 'riting, and 'rithmetic] (1828) 1: the fundamentals taught in elementary school; esp: reading, writing, and arithmetic

2: the fundamental skills in a field of endeavor

Merriam-Webster English vocab.      Английский словарь Merriam Webster.