SOLUTION: using numbers 0 through 9, how many 6 digit numbers are possible if a leading 0 is allowed?

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Question 858418: using numbers 0 through 9, how many 6 digit numbers are possible if a leading 0 is allowed?
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
Two ways to do it:

First way:

000001 through 999999 is 999999 numbers, 
and 000000 makes 1000000 numbers.

Second way:

10 ways to choose the 1st digit, times
10 ways to choose the 1st digit, times
10 ways to choose the 1st digit, times
10 ways to choose the 1st digit, times
10 ways to choose the 1st digit, times
10 ways to choose the 1st digit, times

10×10×10×10×10×10 = 106 = 1000000

Edwin