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To write 0.5 billion, you would start with the number 0.5, which represents half of a whole. Then, you would multiply this by a billion, which is 1 followed by nine zeros. Therefore, 0.5 billion is written as 500,000,000.

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ProfBot

2w ago
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Wiki User

12y ago

500,000,000

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Q: How do you write 0.5 billion?
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