我要keep住每個星期日都要有$100起account.
但係第一個星期日得番$90起account,
第二個星期得番$80起accoun.
咁我第三星期該put幾多錢入acoount, 先可以令佢keep住$100進入第4星期??
*每一個星期結算都係果個星期ge average.
簡單maths題
2008-05-20 7:42 am
回答 (2)
2008-05-20 8:52 am
✔ 最佳答案
lst week -------$902nd week-----$80
3rd week-----$70 +$10+10+10
4th week ----$100
You should put $30 to your account by the 3rd week, so that the total would be $100. The reason is at the 3rd week, you have only $70 left.
2008-05-20 21:38:13 補充：
3rd week-----it should be $80 (balance from 2nd week) + $20 = $100
You should add $20 to your account by the 3rd week.
2008-05-22 3:05 am
咁我第三星期該put$60入acoount, 先可以令佢keep住$100進入第4星期.
收錄日期: 2021-04-13 15:36:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080519000051KK03324