document.write( "Question 164324: how many 1's are between the numbers 1-500 ? I have tried to rite down all the numbers that have the number 1 in them and i came up with 150. Am I rite ? I am in 5th grade and this is for a study guide for a math tournament . \n" ); document.write( "

Algebra.Com's Answer #121122 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let's do it this way.
\n" ); document.write( "From 000-009, there is 1 one(001).
\n" ); document.write( "From 010-019, there are 10+1=11 ones (011 counts as 2).
\n" ); document.write( "From 020-029, there is 1 one(021).
\n" ); document.write( "From 030-039, there is 1 one(031).
\n" ); document.write( "From 040-049, there is 1 one(041).
\n" ); document.write( "From 050-059, there is 1 one(051).
\n" ); document.write( "From 060-069, there is 1 one(061).
\n" ); document.write( "From 070-079, there is 1 one(071).
\n" ); document.write( "From 080-089, there is 1 one(081).
\n" ); document.write( "From 090-099, there is 1 one(091).
\n" ); document.write( "So from 000-099, there are 9+11=20 ones.
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\n" ); document.write( "The same holds true for 200-299 (20),300-399 (20), 400-499 (20).
\n" ); document.write( "That's 80 so far.
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\n" ); document.write( "It also holds for 100-199 but there is also the additional 1 in the hundreds place (20+100=120).
\n" ); document.write( "Let's add it all up.
\n" ); document.write( "80+120=200.
\n" ); document.write( "I count 200 ones.
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