Expanded form(s): 300 + 40 + 7 + .3 + .09 + .002 = 300 + 40 + 7 + 3/10 + 9/100 + 2/100 = 3 × 100 + 4 × 10 + 7 × 1 + 3 × (1/10) + 9 × (1/100) + 2 × (1/1000) = 3 × 10² + 4 × 10¹ + 7 × 10⁰ + 3 × (1/10¹) + 9 × (1/10²) + 2 × (1/10³)

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