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Finding the answer to a math problem (with process attached) is urgent! ! ! ! ! ! !
Analysis: 1 The number of times this number appears is the sum of the number of times it appears in each digit.

Unit: every 10 consecutive page number, "1" appears ten times. From131+10 =13 …1,it can be seen that * * appears/

The number 10: "1"appears ten times every hundred consecutive page numbers, from13 1 ÷100 =1... 31,and the remaining 3.

Hundreds of places: from 100 to 13 1 * * appeared 100,1,102, …,1.

Therefore, the number of occurrences of "1" in the page number of this book is easy to forget.

Answer: 14+20+32=66 (times).

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