0 (number)

0 (zero; BrE: /ˈzɪərəʊ/ or AmE: /ˈziːroʊ/) is both a number and the numerical digit used to represent that number in numerals. It fulfills a central role in mathematics as the additive identity of the integers, real numbers, and many other algebraic structures. As a digit, 0 is used as a placeholder in place value systems. Names for the number 0 in English include zero, nought or (US) naught (/ˈnɔːt/), nil, or — in contexts where at least one adjacent digit distinguishes it from the letter "O" — oh or o (/ˈoʊ/). Informal or slang terms for zero include zilch and zip.Ought and aught (/ˈɔːt/), as well as cipher, have also been used historically.

Etymology

The word zero came into the English language via French zéro from Italian zero, Italian contraction of Venetian zevero form of 'Italian zefiro via ṣafira or ṣifr. In pre-Islamic time the word ṣifr (Arabic صفر) had the meaning 'empty'.Sifr evolved to mean zero when it was used to translate śūnya (Sanskrit: शून्य) from India. The first known English use of zero was in 1598.

Number

A number is a mathematical object used to count, measure, and label. The original examples are the natural numbers 1, 2, 3, and so forth. A notational symbol that represents a number is called a numeral. In addition to their use in counting and measuring, numerals are often used for labels (as with telephone numbers), for ordering (as with serial numbers), and for codes (as with ISBNs). In common usage, the term number may refer to a symbol, a word, or a mathematical abstraction.

In mathematics, the notion of number has been extended over the centuries to include 0, negative numbers, rational numbers such as and , real numbers such as and , complex numbers, which extend the real numbers by including , and sometimes additional objects. Calculations with numbers are done with arithmetical operations, the most familiar being addition, subtraction, multiplication, division, and exponentiation. Their study or usage is called arithmetic. The same term may also refer to number theory, the study of the properties of the natural numbers.

Khan Academy

Khan Academy is a non-profit educational organization created in 2006 by educator Salman Khan with the aim of providing a free, world-class education for anyone, anywhere. The organization produces short lectures in the form of YouTube videos. In addition to micro lectures, the organization's website features practice exercises and tools for educators. All resources are available for free to anyone around the world. The main language of the website is English, but the content is also available in other languages.

History

The founder of the organization, Salman Khan, was born in New Orleans, Louisiana, United States to immigrant parents from Bangladesh and India. After earning three degrees from the Massachusetts Institute of Technology (a BS in mathematics, a BS in electrical engineering and computer science, and an MEng in electrical engineering and computer science), he pursued an MBA from Harvard Business School.

In late 2004, Khan began tutoring his cousin Nadia who needed help with math using Yahoo!'s Doodle notepad.When other relatives and friends sought similar help, he decided that it would be more practical to distribute the tutorials on YouTube. The videos' popularity and the testimonials of appreciative students prompted Khan to quit his job in finance as a hedge fund analyst at Connective Capital Management in 2009, and focus on the tutorials (then released under the moniker "Khan Academy") full-time.

List of Sesame Street recurring segments

This is a list of miscellaneous recurring segments on the children's daytime program, Sesame Street.

Former/New Segments

Elmo the Musical

Elmo the Musical is a new segment that debuted in season 43. In this segment, Elmo goes on a different musical adventure with help from the curtain Velvet.

Cookie's Crumby Pictures

Cookie's Crumby Pictures (AKA Crumby Pictures Presents) is a new segment that first aired in the 44th season in 2013.

Each 5-minute segment is done in the style of a coming attractions trailer showing footage of Cookie Monster in various film parodies where he uses executive functioning skills (such as patience, focusing, and memorization) to solve problems.

The segment is replaced by Smart Cookies in 2016.

Note: These spanish dubbing by Sesame Amigos.

What's The Word on the Street

What's the Word on the Street? first appeared in 2007. Murray Monster hosts the segment which precedes the corporate sponsor spots before each episode. He speaks with people about what the word of the day means, and instructs the audience to listen for its usage in the following episode. Starting in Season 46, the segment stopped airing and characters say what is going on Sesame Street instead.