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2. Elementary arithmetic - Wikipedia

   en.wikipedia.org/wiki/Elementary_arithmetic

   Elementary arithmetic. Appearance. The symbols for elementary-level math operations. From top-left going clockwise: addition, division, multiplication, and subtraction. Elementary arithmetic is a branch of mathematics involving addition, subtraction, multiplication, and division.

3. Subtraction - Wikipedia

   en.wikipedia.org/wiki/Subtraction

   [2] In a sense, subtraction is the inverse of addition. That is, c = a − b if and only if c + b = a. In words: the difference of two numbers is the number that gives the first one when added to the second one. Subtraction follows several important patterns. It is anticommutative, meaning that changing the order changes the sign of the answer.

4. Singapore math - Wikipedia

   en.wikipedia.org/wiki/Singapore_math

   Singapore math (or Singapore maths in British English [1]) is a teaching method based on the national mathematics curriculum used for first through sixth grade in Singaporean schools. [2][3] The term was coined in the United States [4] to describe an approach originally developed in Singapore to teach students to learn and master fewer ...

5. Educational stage - Wikipedia

   en.wikipedia.org/wiki/Educational_stage

   2nd grade 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 ...

6. Worksheet - Wikipedia

   en.wikipedia.org/wiki/Worksheet

   In accounting, a worksheet is, or was, a sheet of ruled paper with rows and columns on which an accountant could record information or perform calculations. These are often called columnar pads, and typically green-tinted. In computing, spreadsheet software presents, on a computer monitor, a user interface that resembles one or more paper ...

7. Manipulative (mathematics education) - Wikipedia

   en.wikipedia.org/wiki/Manipulative_(mathematics...

   Manipulative (mathematics education) In mathematics education, a manipulative is an object which is designed so that a learner can perceive some mathematical concept by manipulating it, hence its name. The use of manipulatives provides a way for children to learn concepts through developmentally appropriate hands-on experience.