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Author Question: According to the double-diamond model of the U.S. class structure proposed by Wysong and Perrucci, ... (Read 19 times) |
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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The horizontal fraction bar was introduced by the Arabs.