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  2. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    The Babylonians also possessed a place-value system and used a sexagesimal numeral system which is still in use today for measuring angles and time. [76] In the 6th century BC, Greek mathematics began to emerge as a distinct discipline and some Ancient Greeks such as the Pythagoreans appeared to have considered it a subject in its own right. [77]

  3. Synonym - Wikipedia

    en.wikipedia.org/wiki/Synonym

    Synonym list in cuneiform on a clay tablet, Neo-Assyrian period [1] A synonym is a word, morpheme, or phrase that means precisely or nearly the same as another word, morpheme, or phrase in a given language. [2] For example, in the English language, the words begin, start, commence, and initiate are all synonyms of one another: they are ...

  4. Roman numerals - Wikipedia

    en.wikipedia.org/wiki/Roman_numerals

    As a non-positional numeral system, Roman numerals have no "place-keeping" zeros. Furthermore, the system as used by the Romans lacked a numeral for the number zero itself (that is, what remains after 1 is subtracted from 1). The word nulla (the Latin word meaning "none") was used to represent 0, although the earliest attested instances are ...

  5. Help:Using Wikipedia for mathematics self-study - Wikipedia

    en.wikipedia.org/wiki/Help:Using_Wikipedia_for...

    There is no quick way around the need for prerequisite knowledge. When King Ptolemy asked for an easier way of learning mathematics, Euclid is famously said to have replied, "there is no royal road to geometry". Some background reading is expected when learning a new mathematical subject, and different readers will have greatly different needs ...

  6. Second grade - Wikipedia

    en.wikipedia.org/wiki/Second_grade

    In The Republic of Ireland, the equivalent to second grade is known as "Second Class" (usually for 7–8 year olds), which is year 4 of primary school.It is traditionally the year that is dedicated to preparing for the child's "First Holy Communion"; however, as Ireland has become increasingly multicultural, more and more schools are opting to prepare for the sacrament outside of school hours.

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