555
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90 of them.
Specify whether you are including the numbers between 0000 and 1000.
How many times does the digit 1 occur in ten place in the numbers from 1 to 1000?
1000
The numbers from 1000 to 9999 are all 4 digits, as are -1000 to -9999. Therefore there are 18,000 four-digit numbers in all.