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2. Positional notation - Wikipedia

   en.wikipedia.org/wiki/Positional_notation

   t. e. Positional notation (or place-value notation, or positional numeral system) usually denotes the extension to any base of the Hindu–Arabic numeral system (or decimal system). More generally, a positional system is a numeral system in which the contribution of a digit to the value of a number is the value of the digit multiplied by a ...

3. Base ten blocks - Wikipedia

   en.wikipedia.org/wiki/Base_ten_blocks

   Dienes blocks in use. Base ten blocks, also known as Dienes blocks after popularizer Zoltán Dienes (Hungarian: [ˈdijɛnɛʃ]), are a mathematical manipulative used by students to practice counting and elementary arithmetic and develop number sense in the context of the decimal place-value system as a more concrete and direct representation than written Hindu–Arabic numerals.

4. Place value - Wikipedia

   en.wikipedia.org/?title=Place_value&redirect=no

   This page was last edited on 1 February 2019, at 19:51 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike License 4.0; additional terms may apply.

5. Hindu–Arabic numeral system - Wikipedia

   en.wikipedia.org/wiki/Hindu–Arabic_numeral_system

   The Hindu–Arabic system is designed for positional notation in a decimal system. In a more developed form, positional notation also uses a decimal marker (at first a mark over the ones digit but now more commonly a decimal point or a decimal comma which separates the ones place from the tenths place), and also a symbol for "these digits recur ad infinitum".

6. Names of large numbers - Wikipedia

   en.wikipedia.org/wiki/Names_of_large_numbers

   Two naming scales for large numbers have been used in English and other European languages since the early modern era: the long and short scales.Most English variants use the short scale today, but the long scale remains dominant in many non-English-speaking areas, including continental Europe and Spanish-speaking countries in Latin America.

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   mail.aol.com

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