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  2. Third grade - Wikipedia

    en.wikipedia.org/wiki/Third_grade

    Third grade (also 3rd Grade or Grade 3) is the third year of formal or compulsory education. ... place value to thousands or ten thousands, and estimation.

  3. Positional notation - Wikipedia

    en.wikipedia.org/wiki/Positional_notation

    In some African languages the word for five is the same as "hand" or "fist" (Dyola language of Guinea-Bissau, Banda language of Central Africa). Counting continues by adding 1, 2, 3, or 4 to combinations of 5, until the secondary base is reached. In the case of twenty, this word often means "man complete". This system is referred to as ...

  4. Academic grading in the United States - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_the...

    A-plusses, if given, are usually assigned a value of 4.0 (equivalent to an A) due to the common assumption that a 4.00 is the best possible grade-point average, although 4.33 is awarded at some institutions. In some places, .25 or .3 instead of .33 is added for a plus grade and subtracted for a minus grade.

  5. Grade 3 - Wikipedia

    en.wikipedia.org/wiki/Grade_3

    Grade 3 may refer to: Grade 3, the third year of primary education. Grade 3 horse races, the third tier in worldwide horse racing. This page was last edited on 26 ...

  6. 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]

  7. Elementary arithmetic - Wikipedia

    en.wikipedia.org/wiki/Elementary_arithmetic

    A subtraction problem such as is solved by borrowing a 10 from the tens place to add to the ones place in order to facilitate the subtraction. Subtracting 9 from 6 involves borrowing a 10 from the tens place, making the problem into +. This is indicated by crossing out the 8, writing a 7 above it, and writing a 1 above the 6.

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