Answered

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PLEASE HELP 20 POINTS One day, River writes down the numbers $1,$ $2,$ $\dots,$ $999.$ What is the sum of all the digits that River wrote down?

Sagot :

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Question isn't well formatted :

Actual question :

One day, River writes down the numbers 1,2,...,999. What is the sum of all the digits that River wrote down?

Answer:

499500

Step-by-step explanation:

Number written :

1, 2,...., 999

The interpretation of the number written is 1 up to 999

Hence, the sum of the number written is the addition of all the numbers from 1 up to 999

Using the python program :

sum = 0

for i in range(1000):

sum += i

print (sum)

Output = 499500

Answer:

13500

Step-by-step explanation:

Notice how it says the sum of all of the DIGITs. We have to add together the sum of the digits. We can do this by:

300(1 + 2 + 3 + 4.... + 9) = 300*45 = 13500

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