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单词 place value
释义
place value

Mathematics
  • In the Hindu-Arabic number system, the 1 in 100 and the 1 in 10 represent different values on account of their places in the numbers’ representations. The introduction of place value relies on the introduction of 0. Previous number systems, such as the ancient Greek, had separately used A, I, and P to denote 1, 10, 100, having no notion of zero at the time.


Geology and Earth Sciences
  • The economic importance attached to the location of a mineral deposit. Minerals or metals with a high intrinsic value, e.g. diamonds or gold, have a low place value as transport costs add little to the eventual market price, so they may be worked anywhere on Earth. In contrast, sands and gravels have a high place value and must be worked near the place of use.


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