3.309 = (3 * 100) + (3 * 1/101) + (9 * 1/103)
3.309 = (3 * 1) + (3 * 1/10) + (9 * 1/1,000)
3.309 = 3 + 3/10 + 9/1,000
3.309 = 3 + 0.3 + 0.009
Expanded Form of 3.309
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