6.721 = (6 * 100) + (7 * 1/101) + (2 * 1/102) + (1 * 1/103)
6.721 = (6 * 1) + (7 * 1/10) + (2 * 1/100) + (1 * 1/1,000)
6.721 = 6 + 7/10 + 2/100 + 1/1,000
6.721 = 6 + 0.7 + 0.02 + 0.001
Expanded Form of 6.721
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