Eric's notebook has 30 pages he wants to number all the pages beginning with 1 how many digits will he write when he writes in his notebook
What do you think?
Numbers 1 ÷ 9 are one digits numbers.
Numbers 10 ÷ 30 are two digits numbers.
Obviously Eric will write 9 one digits numbers and 21 two digits numbers.
9 * 1 + 21 * 2 = 9 + 42 = 51 digits
To determine the number of digits Eric will write when numbering the pages of his notebook, you need to consider the total number of pages he has.
Since Eric has 30 pages, he will start numbering from 1 and go up to 30.
To find the number of digits, you can analyze the following patterns:
1-digit numbers: There are 9 one-digit numbers (1 to 9).
2-digit numbers: There are 90 two-digit numbers (10 to 99).
3-digit numbers: There are 900 three-digit numbers (100 to 999).
4-digit numbers: There are 9000 four-digit numbers (1000 to 9999).
In this case, Eric's notebook has 30 pages, so all the numbers he writes will be 2-digit numbers.
Therefore, in his notebook, Eric will write a total of 2 digits (from page 1 to page 30).