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2. Positional notation - Wikipedia

   en.wikipedia.org/wiki/Positional_notation

   A digit's value is the digit multiplied by the value of its place. Place values are the number of the base raised to the nth power, where n is the number of other digits between a given digit and the radix point.

3. Numerical digit - Wikipedia

   en.wikipedia.org/wiki/Numerical_digit

   Each successive place to the left of this has a place value equal to the place value of the previous digit times the base. Similarly, each successive place to the right of the separator has a place value equal to the place value of the previous digit divided by the base. For example, in the numeral 10.34 (written in base 10), the 0 is ...

4. Fourth grade - Wikipedia

   en.wikipedia.org/wiki/Fourth_grade

   In math, students learn about place value up to the millions, prime and composite numbers, multiplying 2-digit and 3-digit numbers, long division, fractions, decimals, the metric system, and geometry. In Social Studies, students learn about geography skills such as map reading and longitude and latitude, state history, and early American history.

5. History of the Hindu–Arabic numeral system - Wikipedia

   en.wikipedia.org/wiki/History_of_the_Hindu...

   The Hindu–Arabic numeral system is a decimal place-value numeral system that uses a zero glyph as in "205". [1]Its glyphs are descended from the Indian Brahmi numerals.The full system emerged by the 8th to 9th centuries, and is first described outside India in Al-Khwarizmi's On the Calculation with Hindu Numerals (ca. 825), and second Al-Kindi's four-volume work On the Use of the Indian ...

6. Significant figures - Wikipedia

   en.wikipedia.org/wiki/Significant_figures

   If the n + 1 digit is greater than 5 or is 5 followed by other non-zero digits, add 1 to the n digit. For example, if we want to round 1.2459 to 3 significant figures, then this step results in 1.25. If the n + 1 digit is 5 not followed by other digits or followed by only zeros, then rounding requires a tie-breaking rule. For example, to round ...

7. The Fabled Fourth Graders of Aesop Elementary School

   en.wikipedia.org/wiki/The_Fabled_Fourth_Graders...

   The Fabled Fourth Graders of Aesop Elementary School is a 2007 children's novel by Candace Fleming. A follow-up novel, Fabled Fifth Graders of Aesop Elementary School , was published in 2010. [ 1 ]