7,101.409 = (7 * 103) + (1 * 102) + (1 * 100) + (4 * 1/101) + (9 * 1/103)
7,101.409 = (7 * 1,000) + (1 * 100) + (1 * 1) + (4 * 1/10) + (9 * 1/1,000)
7,101.409 = 7,000 + 100 + 1 + 4/10 + 9/1,000
7,101.409 = 7,000 + 100 + 1 + 0.4 + 0.009
Expanded Form of 7,101.409
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