When positioned in a number, they are also positioned to represent a place value. If 9 is exceeded, the place value resets to 0 and a 1 must be placed in the next place value column to the left. Figure 2-4 illustrates the decimal number system place values. They are derived by sequentially raising 10 to a higher power moving from right to left. Thus, each position has a value 10 times that of the position to its right.