0.454 = (4 * 1/101) + (5 * 1/102) + (4 * 1/103)
0.454 = (4 * 1/10) + (5 * 1/100) + (4 * 1/1,000)
0.454 = 4/10 + 5/100 + 4/1,000
0.454 = 0.4 + 0.05 + 0.004
Expanded Form of 0.454
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