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  2. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    A mixed number (also called a mixed fraction or mixed numeral) is the sum of a non-zero integer and a proper fraction, conventionally written by juxtaposition (or concatenation) of the two parts, without the use of an intermediate plus (+) or minus (−) sign. When the fraction is written horizontally, a space is added between the integer and ...

  3. Fraction (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Fraction_(chemistry)

    A fraction in chemistry is a quantity collected from a batch of a substance in a fractionating separation process. In such a process, a mixture is separated into fractions, which have compositions that vary according to a gradient. A fraction can be defined as a group of chemicals that have similar boiling points.

  4. Gifted education - Wikipedia

    en.wikipedia.org/wiki/Gifted_education

    Following three later additions (Korea Science Academy of KAIST, Seoul Science High School and Daegu Science High School), approximately 1,500, or 1 in 1,300 (0.08 percent) of high school students are currently enrolled among its four gifted academies. By 2008, about 50,000, or 1 in 140 (0.7 percent) of elementary and middle school students ...

  5. Fractional distillation - Wikipedia

    en.wikipedia.org/wiki/Fractional_distillation

    The fractional distillation of organic substances played an important role in the 9th-century works attributed to the Islamic alchemist Jabir ibn Hayyan, as for example in the Kitāb al-Sabʿīn ('The Book of Seventy'), translated into Latin by Gerard of Cremona (c. 1114–1187) under the title Liber de septuaginta. [1]

  6. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Some students studying math may develop an apprehension or fear about their performance in the subject. This is known as math anxiety or math phobia, and is considered the most prominent of the disorders impacting academic performance. Math anxiety can develop due to various factors such as parental and teacher attitudes, social stereotypes ...

  7. Wikipedia:Reference desk/Archives/Science/December 2005 ...

    en.wikipedia.org/.../Archives/Science/December_2005

    21.6 Converting Word document to PDF. 5 comments. 21.7 ... 22.25 6th grade science project-"what age group has the ... 31.5 6 beryllium atoms and a partridge in a ...