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When writing with a Western alphabet of more than nine letters, there is a temptation to go on with words like eleven.
Less elegant number schemes such as Roman numerals, built on positions by adding a unit to a power of ten symbol, without using placeholders (zeros). This became even more unwieldy with or half powers of ten such as L for 50 or D for 50.
However, most theologians and religious historians estimate that of some year between 7 and 4 BCE.
We have seen estimates as late as 4 CE and as early as the second century BCE.
Another truly influential part of history in Vietnam occurred during the late Bronze Age, when the Đông Sơn culture dramatically advanced the civilization.
Vietnam's peculiar geography made it a difficult country to attack, which is why Vietnam under the Hùng kings was for so long an independent and self-contained state.
This place holding or place notation was much easier than inventing a new character for each number (imagine having to memorize an enormous number of characters just to read the date! Having a decimal system from the beginning was a big advantage in making mathematical advances.
The Decimal number system is also called HINDU-ARABIC, or ARABIC, or base 10 system.
Mathematics commonly uses a positional numeral system employing 10 as the base and requiring 10 different numerals, the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and a dot (decimal point).
The Xích Tỵs and Qins were among the earliest foreign aggressors of Vietnam, but the ancient Vietnamese managed to regain control of the country soon after the invasions.
Once Vietnam did succumb to foreign rule, however, it proved unable to escape from it, and for 1,100 years, Vietnam had been successively governed by a series of Chinese dynasties: the Han, Eastern Wu, Jin, Liu Song, Southern Qi, Liang, Sui, Tang, and Southern Han; leading to the loss of native cultural heritage, language, and much of national identity.
Both measure the number of years since the approximate birthday of Yeshua of Nazareth (a.k.a. Designation of a particular year in BC and BCE also have identical values.