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Subtraction is usually written using the minus sign "−" between the terms; that is, in infix notation. The result is expressed with an equals sign. For example, = (pronounced as "two minus one equals one") = (pronounced as "four minus two equals two")
Plus and minuses. An obelus used as a variant of the minus sign in an excerpt from an official Norwegian trading statement form called «Næringsoppgave 1» for the taxation year 2010. Division is often shown in algebra and science by placing the dividend over the divisor with a horizontal line, also called a fraction bar, between them.
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 ]
700 (seven hundred) is the natural number following 699 and preceding 701. It is the sum of four consecutive primes (167 + 173 + 179 + 181), the perimeter of a Pythagorean triangle (75 + 308 + 317) [ 1 ] and a Harshad number .
Raising the decimal digits of 175 to the powers of successive integers produces 175 back again: 175 = 1 1 + 7 2 + 5 3. [1] 175 is a figurate number for a rhombic dodecahedron, the difference of two consecutive fourth powers: 175 = 4 4 − 3 4. [2] It is also a decagonal number and a decagonal pyramid number, the smallest number after 1 that has ...
unstrict inequality signs (less-than or equals to sign and greater-than or equals to sign) 1670 (with the horizontal bar over the inequality sign, rather than below it) John Wallis: 1734 (with double horizontal bar below the inequality sign) Pierre Bouguer
Preceding 1848 in the list of idoneal numbers is 1365, [f] whose arithmetic mean of divisors is equal to 168 [15] [16] (while 1365 has a totient of 576 = 24 2). Where 48 is the 27th ideoneal number, 408 is the 58th.
The Arithmometer, invented in 1820 as a four-operation mechanical calculator, was released to production in 1851 as an adding machine and became the first commercially successful unit; forty years later, by 1890, about 2,500 arithmometers had been sold [16] plus a few hundreds more from two arithmometer clone makers (Burkhardt, Germany, 1878 ...