okay so the three in 6300 is 10 times bigger than the three and a 530 why because the three in six hundred thirty is in the hundredths place and the three in 530 is in the tenths place meaning that the 3 in 6300 is 10 times bigger than the one in 530. what do I mean by 10 times bigger? consider this 3 * 10 equals 30 or if you Annex a 0 at the end it would be 300 as in 6 thousand three hundred