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  1. Addition - Wikipedia

    Addition is one of the four basic operations of arithmetic, with the other three being subtraction, multiplication, and division. This operation works by adding two or more terms. [12] An arbitrary …

  2. Elementary arithmetic - Wikipedia

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

  3. Plus and minus signs - Wikipedia

    In addition, the symbol + represents the operation of addition, which results in a sum, while the symbol − represents subtraction, resulting in a difference. [1] Their use has been extended to many other …

  4. Michael addition reaction - Wikipedia

    In organic chemistry, the Michael reaction or Michael 1,4 addition is a reaction between a Michael donor (an enolate or other nucleophile) and a Michael acceptor (usually an α,β-unsaturated carbonyl) to …

  5. Order of operations - Wikipedia

    The order of operations, that is, the order in which the operations in an expression are usually performed, results from a convention adopted throughout mathematics, science, technology, and …