Shapes fractions of shapes. find out how to pronounce, say, or write 1 in different languages and numerologies, and explore related words and phrases. it is the multiplicative identity of the integers, real numbers, and complex numbers. find out its properties, facts, and meanings in different cultures and contexts. in mathematics, 1 ( negative one or minus one) is the additive inverse of 1, that is, the number that when added to 1 gives the additive identity element, 0. learn about the number 1 in mathematics, computer science, and other fields. learn the different definitions, usage and translations of the word 1, from one, 1, i, ace, single, unity to the symbol 1, the number one, the atomic number of hydrogen, the designation for a primary category or option, and more. 0/ 800 mastery points. community questions. it is the negative integer greater than negative two ( 2) exercitii and less than 0. as 1 is the result of the empty product, any number multiplied or divided by 1 remains unchanged ( ). learn about the digit, symbol, and meaning of 1 in different languages and contexts. ( aligned with matematica common core standards). length and size bar graphs time. start course challenge. learn first grade math— addition, subtraction, length, graphs, time, and shapes. find out the origin, variations, and exercitii matematica clasa 1 pdf usage of 1 as a digit, a symbol, a glyph, and a term. by definition, 1 is the magnitude, clasa absolute value, or norm of a unit complex number, unit vector, and a unit matrix ( more usually called an identity pdf matrix ). up next for you: course challenge test your knowledge of the skills in this course.