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  2. Roundedness - Wikipedia

    en.wikipedia.org/wiki/Roundedness

    There are two types of vowel rounding: protrusion and compression. [3] [4] [5] In protruded rounding, the corners of the mouth are drawn together and the lips protrude like a tube, with their inner surface visible. In compressed rounding, the corners of the mouth are drawn together, but the lips are also drawn together horizontally ("compressed ...

  3. Rounding - Wikipedia

    en.wikipedia.org/wiki/Rounding

    Rounding or rounding off means replacing a number with an approximate value that has a shorter, simpler, or more explicit representation. For example, replacing $ 23.4476 with $ 23.45, the fraction 312/937 with 1/3, or the expression √2 with 1.414. Rounding is often done to obtain a value that is easier to report and communicate than the ...

  4. Dolch word list - Wikipedia

    en.wikipedia.org/wiki/Dolch_word_list

    These lists of words are still assigned for memorization in elementary schools in America and elsewhere. Although most of the 220 Dolch words are phonetic, children are sometimes told that they can't be "sounded out" using common sound-to-letter phonics patterns and have to be learned by sight; hence the alternative term, "sight word".

  5. Third grade - Wikipedia

    en.wikipedia.org/wiki/Third_grade

    In Brazil, third grade is the terceiro ano do Ensino Fundamental I, in this case, children begin their first year of elementary school at age 6 or 7 depending on their birthdate. Therefore, the 3rd year of elementary school is typically for students of 8 (96 months)–9 years (108 months) of age.

  6. ABCmouse.com Early Learning Academy - Wikipedia

    en.wikipedia.org/wiki/ABCmouse.com_Early...

    ABCmouse.com is a digital education program for children ages 2–8, created by the edtech company Age of Learning, Inc. [2] [3] The program offers educational games, videos, puzzles, printables, and a library of regular and “read-aloud” children’s books, covering subjects including reading and language arts, math, science, health, social studies, music, and art.

  7. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    The everyday approximation 3.14 has three significant figures and 7 correct binary digits. The approximation 22/7 has the same three correct decimal digits but has 10 correct binary digits. Most calculators and computer programs can handle the 16-digit expansion 3.141592653589793, which is sufficient for interplanetary navigation calculations. [5]

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