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- Dictionarynum·ber line/ˈnəmbər līn/
noun
- 1. a line on which numbers are marked at intervals, used to illustrate simple numerical operations.
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- Number line
In elementary mathematics, a number line is a picture of a straight line that serves as spatial representation of numbers, usually graduated like a ruler with a particular origin point representing the number zero and evenly spaced marks in either direction representing integers, imagined to extend infinitely. Wikipedia
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