1) Algorithm 2) Arithmetic 3) Decimal number system 4) Decimal numeration system 5) Decimal system 1) Numeration 
Algorism is the technique of performing basic arithmetic by writing numbers in place value form and applying a set of memorized rules and facts to the digits. One who practices algorism is known as an algorist. This system largely superseded earlier calculation systems that used a different set of symbols for each numerical magnitude and in some c...
• (n.) Alt. of Algorithm
[n] - the Arabic (or decimal) system of numeration 2. [n] - computation with Arabic figures
noun the Arabic (or decimal) system of numeration
the Arabic system of arithmetical notation (with the figures 1, 2, 3, etc.). · the art of computation with the Arabic figures, one to nine, plus the zero; arithmetic. · algorithm.