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2. Multiplication - Wikipedia

   en.wikipedia.org/wiki/Multiplication

   When multiplication is repeated, the resulting operation is known as exponentiation. For instance, the product of three factors of two (2×2×2) is "two raised to the third power", and is denoted by 2 3, a two with a superscript three. In this example, the number two is the base, and three is the exponent. [24]

3. D'Nealian - Wikipedia

   en.wikipedia.org/wiki/D'Nealian

   D'Nealian. The D'Nealian Method (sometimes misspelled Denealian) is a style of writing and teaching handwriting based on Latin script which was developed between 1965 and 1978 by Donald N. Thurber (1927–2020) in Michigan, United States. Building on his experience as a primary school teacher, Thurber aimed to make the transition from print ...

4. Order of operations - Wikipedia

   en.wikipedia.org/wiki/Order_of_operations

   Order of operations. In mathematics and computer programming, the order of operations is a collection of rules that reflect conventions about which operations to perform first in order to evaluate a given mathematical expression. These rules are formalized with a ranking of the operations. The rank of an operation is called its precedence, and ...

5. Elementary arithmetic - Wikipedia

   en.wikipedia.org/wiki/Elementary_arithmetic

   From top-left going clockwise: addition, division, multiplication, and subtraction. Elementary arithmetic is a branch of mathematics involving addition, subtraction, multiplication, and division. Due to its low level of abstraction, broad range of application, and position as the foundation of all mathematics, elementary arithmetic is generally ...

6. Number sentence - Wikipedia

   en.wikipedia.org/wiki/Number_sentence

   A valid number sentence that is true: 83 + 19 = 102. A valid number sentence that is false: 1 + 1 = 3. A valid number sentence using a 'less than' symbol: 3 + 6 < 10. A valid number sentence using a 'more than' symbol: 3 + 9 > 11. Some students will use a direct computational approach. They will carry out the addition 26 + 39 = 65, put 65 = 26 ...

7. Natural number - Wikipedia

   en.wikipedia.org/wiki/Natural_number

   More precisely, each natural number n is defined as an explicitly defined set, whose elements allow counting the elements of other sets, in the sense that the sentence "a set S has n elements" means that there exists a one to one correspondence between the two sets n and S. The sets used to define natural numbers satisfy Peano axioms.