[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
[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. 2012