0.499 = (4 * 1/101) + (9 * 1/102) + (9 * 1/103)
0.499 = (4 * 1/10) + (9 * 1/100) + (9 * 1/1,000)
0.499 = 4/10 + 9/100 + 9/1,000
0.499 = 0.4 + 0.09 + 0.009
Expanded Form of 0.499
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