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  2. Discrete mathematics - Wikipedia

    en.wikipedia.org/wiki/Discrete_mathematics

    Objects studied in discrete mathematics include integers, graphs, and statements in logic. [1][2][3] By contrast, discrete mathematics excludes topics in "continuous mathematics" such as real numbers, calculus or Euclidean geometry. Discrete objects can often be enumerated by integers; more formally, discrete mathematics has been characterized ...

  3. Venn diagram - Wikipedia

    en.wikipedia.org/wiki/Venn_diagram

    A Venn diagram is a widely used diagram style that shows the logical relation between sets, popularized by John Venn (1834–1923) in the 1880s. The diagrams are used to teach elementary set theory, and to illustrate simple set relationships in probability, logic, statistics, linguistics and computer science.

  4. Class arrangement - Wikipedia

    en.wikipedia.org/wiki/Class_arrangement

    Class arrangement. Class arrangement refers to a layout of the physical setup of chairs, tables, materials in a school classroom. In most countries, this arrangement is often chosen by a paid, professional teacher with the assistance of a seating chart. Deciding upon a classroom arrangement is typically done at the beginning of a school year as ...

  5. Abacus - Wikipedia

    en.wikipedia.org/wiki/Abacus

    Abacus. An abacus (pl.: abaci or abacuses), also called a counting frame, is a hand -operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Arabic numeral system. [1] An abacus consists of a two-dimensional array of slidable beads (or similar objects).

  6. Mathematical table - Wikipedia

    en.wikipedia.org/wiki/Mathematical_table

    For tables with greater precision (more digits per value), higher order interpolation may be needed to get full accuracy. [3] In the era before electronic computers, interpolating table data in this manner was the only practical way to get high accuracy values of mathematical functions needed for applications such as navigation, astronomy and ...

  7. Standard normal table - Wikipedia

    en.wikipedia.org/wiki/Standard_normal_table

    Standard normal table. In statistics, a standard normal table, also called the unit normal table or Z table, [ 1 ] is a mathematical table for the values of Φ, the cumulative distribution function of the normal distribution. It is used to find the probability that a statistic is observed below, above, or between values on the standard normal ...

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