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Find the sum of the digits of all the numbers from 1 to 100.

 Sep 22, 2020
 #1
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1-100

(1+100) (2+99) (3+98)... (50+51)

(101 x 50) = 5050

 Sep 22, 2020
 #2
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The sum of the DIGITS of all numbers from 1 to 100 =1+2+3+4+5+6+7+8+9+1+0+1+1+1+2+1+3+1+4+1+5+1+6+1+7+1+8+1+9+2+0......etc=901 including 100.

 Sep 22, 2020

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