One figure accuracy is when it is rounded to the nearest 10, 100, 100.
2000
100,000
6694 rounded to 1 significant figure is 7000
99.6 rounded to 1 significant figure is 100
0.00584 rounded off to 1 significant figure is 0.006
30,569 rounded off to 1 significant figure is 30,000
2300 rounded to 1 significant figure is 2000.
470 rounded to one significant figure is 500
541713 rounded to one significant figure is 500000.
It depends to what degree of accuracy: 10.25 (2 Decimal Places) 10.3 (1 Decimal Place) 10 (0 Decimal Places) 10 (1 Significant Figure) I included 1 Significant Figure for your future reference. If the number was 11.245 then to 1 Significant figure would be 10 because 0 does not count as a figure and therefore the 1 in 11 would be the only FIGURE.
Rounded to 1 significant figure it is 0.4