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2. Division (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Division_(mathematics)

   In abstract algebra, given a magma with binary operation ∗ (which could nominally be termed multiplication), left division of b by a (written a \ b) is typically defined as the solution x to the equation a ∗ x = b, if this exists and is unique. Similarly, right division of b by a (written b / a) is the solution y to the equation y ∗ a = b ...

3. Chunking (division) - Wikipedia

   en.wikipedia.org/wiki/Chunking_(division)

   Compared to the short division and long division methods that are traditionally taught, chunking may seem strange, unsystematic, and arbitrary. However, it is argued that chunking, rather than moving straight to short division, gives a better introduction to division, in part because the focus is always holistic, focusing throughout on the ...

4. Third grade - Wikipedia

   en.wikipedia.org/wiki/Third_grade

   In mathematics, students are usually introduced to multiplication and division facts, place value to thousands or ten thousands, and estimation.Depending on the elementary school, third grade students may even begin to work on long division, such as dividings in the double digits, hundreds, and thousands.

5. Elementary mathematics - Wikipedia

   en.wikipedia.org/wiki/Elementary_mathematics

   A root of degree 2 is called a square root and a root of degree 3, a cube root. Roots of higher degree are referred to by using ordinal numbers, as in fourth root, twentieth root, etc. For example: 2 is a square root of 4, since 2 2 = 4. −2 is also a square root of 4, since (−2) 2 = 4.

6. Long division - Wikipedia

   en.wikipedia.org/wiki/Long_division

   Caldrini (1491) is the earliest printed example of long division, known as the Danda method in medieval Italy, [4] and it became more practical with the introduction of decimal notation for fractions by Pitiscus (1608). The specific algorithm in modern use was introduced by Henry Briggs c. 1600. [5]

7. Educational stage - Wikipedia

   en.wikipedia.org/wiki/Educational_stage

   Third grade: 8–9 3rd grade Fourth grade: 9–10 4th grade Fifth grade: 10–11 5th grade Sixth grade: 11–12 6th grade Seventh grade: 12–13 1st grade Gymnasium (Lower secondary school) (US equivalent: Middle school) Eighth grade: 13–14 2nd grade Ninth grade: 14–15 3rd grade Tenth grade: 15–16 1st grade Lyceum (Upper secondary school)