<p>First, '书' in '打开书100页'(open book 100 pages) can be omitted</p>

<p>Yes, if you omitted '第' in '打开第100页'(open page 100) and wrote "打开100页", the sentence could be interpreted as " open one hundred pages". For this very reason, 第 cannot be omitted.</p>

CC BY-SA 3.0
2018-03-20T21:55:53.123Z
If I don't omit 书 then 第 is obligatory either way?
Enrico Brasil
CC BY-SA 3.0
2018-03-20T22:16:25.430Z
第 is obligatory, doesn't matter if you omit  书 or not
Tang Ho
CC BY-SA 3.0
2018-03-20T21:10:02.223Z
2018-03-20T21:10:02.223Z
Tang Ho
<p>Can one say 打开书100页 or is it necessary to add 第 before 100?</p>

<p>I was thinking that it would be the difference between saying "open the book at/to page 100" (with 第) and "open the book 100 pages" (without 第, which sounds wrong to me).</p>

CC BY-SA 3.0
2018-03-20T21:56:07.337Z
见１- １０ 页 see pp。１- １０，把书翻到(第)十页 turn to p. 10，iciba has： Open your book and turn it to page 78 打开书翻到78页
user6065
<grammar><usage>
Do I necessarily have to use 第 when talking about a page number?
# Do I necessarily have to use 第 when talking about a page number?

(Asked by: username_0 on 2018-03-20)

Can one say 打开书100页 or is it necessary to add 第 before 100?

I was thinking that it would be the difference between saying "open the book at/to page 100" (with 第) and "open the book 100 pages" (without 第, which sounds wrong to me).

**Tags:** grammar, usage
> **Comments:**
> **username_1**: 见１- １０ 页 see pp。１- １０，把书翻到(第)十页 turn to p. 10，iciba has： Open your book and turn it to page 78 打开书翻到78页  

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## 1 answers

### Answer by username_2 on 2018-03-20. Score: 1

First, '书' in '打开书100页'(open book 100 pages) can be omitted

Yes, if you omitted '第' in '打开第100页'(open page 100) and wrote "打开100页", the sentence could be interpreted as " open one hundred pages". For this very reason, 第 cannot be omitted.

> **Comments:**
> **username_0**: If I don't omit 书 then 第 is obligatory either way?  
> **username_2**: 第 is obligatory, doesn't matter if you omit  书 or not  

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