1. There are totally 256 Chinese books and English books in a library. If the ratio of the number of Chinese books to that of English books is 5 : 3 , find the number of Chinese books.
2. A machine can produce 6400 boxes of tissue iin 8 hours. Express the production rate of the machine in boxes/hour.
3. Describe the pattern of the following numbers. (5,14,23,32,41)
4. What percentage of 80 is 50?
5. 30% of a number is 75. Find the number.
請詳細回答!!! [ 列步驟 ]
Maths
2007-09-02 12:28 am
回答 (1)
2007-09-02 12:53 am
✔ 最佳答案
１．the number of chinese is:256times (5over8)=160
2.6400over8=800boxes/hour
3.9n-4
4.(50over80)times100%=62.5%
5.75over30%=250
唔知有冇錯你最好驗算下
收錄日期: 2021-04-13 18:59:31
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070901000051KK03183