Introduction to Industrial Automation

A.2   Decimal Arithmetic System

In a decimal arithmetic system, ten unique digits or numbers are used, from 0 to 9, and hence the 

base is 10. The value of a decimal number depends on the amount of digits and the position weight 

of each digit. The first position to the immediate left of the decimal point corresponds to units, 

which follows that of decades, hundreds, etc., as shown in Figure A.1. Each position value can be 

expressed as a power of 10, starting from 10

0

 to the left and 10

–1

 to the right of the decimal point.

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  Appendix A