Sign-value notation
- 符值相加记数法（符值相加记数法：利用排列的符号表示数字，先指定符号数值，再排列表示其他数字）
Sign-value notation
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abstract:
A sign-value notation represents numbers by a series of numeric signs that added together equal the number represented. In Roman numerals for example, X means ten and L means fifty.
以上来源于:
WordNet