sum of digits?

[fecoupefe]

the sum of all digits in the numbers 34,35,and 36 is 24 because (3+4)+(3+5)+(3+6)=24. Find the sum of all the digits in the first twenty-five natural numbers:1,2,3,4,5,....,23,24,25

 

[Denis]

Is this your homework you're trying to get done?

 

[fecoupefe]

no!

 

[fecoupefe]

just like to play with numbers and compare answers!

 

[Denis]

Add 'em up then; 30 seconds should do it.

http://www.mathhelpforum.com/math-help/ ... igits.html

....hmmmmm

 

[Deleted member 4993]

the sum of all digits in the numbers 34,35,and 36 is 24 because (3+4)+(3+5)+(3+6)=24. Find the sum of all the digits in the first twenty-five natural numbers:1,2,3,4,5,....,23,24,25

Addinng 1 - 5 = 15

Adding 1 - 9 = 45

adding 10 - 19 = ten ones and (1 + ...+ 9)

adding 20 - 25 = six twos and (1 + ...+ 5)

 

[Deleted member 4993]

I wish math came naturally but it doesn't and to explain it to a 10 yr old doesn't help either!

just like to play with numbers and compare answers!

Are you the 10 yr. old or guardian of the 10 yr. old?