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2. Virtual currency - Wikipedia

   en.wikipedia.org/wiki/Virtual_currency

   Virtual currency. Virtual currency, or virtual money, is a digital currency that is largely unregulated, issued and usually controlled by its developers, and used and accepted electronically among the members of a specific virtual community. [1] In 2014, the European Banking Authority defined virtual currency as "a digital representation of ...

3. 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.

4. Plus and minus signs - Wikipedia

   en.wikipedia.org/wiki/Plus_and_minus_signs

   The plus sign ( +) and the minus sign ( −) are mathematical symbols used to denote positive and negative functions, respectively. In addition, + represents the operation of addition, which results in a sum, while − represents subtraction, resulting in a difference. [1] Their use has been extended to many other meanings, more or less analogous.

5. Verbal arithmetic - Wikipedia

   en.wikipedia.org/wiki/Verbal_arithmetic

   Verbal arithmetic, also known as alphametics, cryptarithmetic, cryptarithm or word addition, is a type of mathematical game consisting of a mathematical equation among unknown numbers, whose digits are represented by letters of the alphabet. The goal is to identify the value of each letter. The name can be extended to puzzles that use non ...

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. Virtual manipulatives for mathematics - Wikipedia

   en.wikipedia.org/wiki/Virtual_manipulatives_for...

   Base Ten blocks for math. Virtual manipulatives for mathematics are digital representations of concrete mathematics manipulatives. [1] These virtual manipulatives are based on the physical manipulatives used in classrooms. They are generally used to introduce mathematical concepts using visuals and are used for teaching students new topics that ...