Nine zeros, when placed after a 1, represent one billion (1,000,000,000).
As the provided reference states, "If you write a 1 followed by nine zeros, you get 1,000,000,000 = one billion!". Therefore, understanding the place value system is key here.
Here's a breakdown:
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Understanding Place Value: Each zero after a digit increases its value by a factor of ten.
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Example:
- 1 followed by one zero: 10 (ten)
- 1 followed by two zeros: 100 (one hundred)
- 1 followed by three zeros: 1,000 (one thousand)
- 1 followed by six zeros: 1,000,000 (one million)
- 1 followed by nine zeros: 1,000,000,000 (one billion)
Therefore, "nine zeros" after a 1 means one billion.