9+8-7+6-5+4-3+2-1+10-9+8-7+6-5+4-3+2-1=?
回答 (9)
2007-08-18 8:08 am
9+8-7+6-5+4-3+2-1+10-9+8-7+6-5+4-3+2-1=?
=18
you can put9+8-7+6-5+4-3+2-1 a half mutiply 2 times and then +10
=18
you can put9+8-7+6-5+4-3+2-1 a half mutiply 2 times and then +10
參考: new trend maths(s1)
2007-08-18 7:13 am
9+8-7+6-5+4-3+2-1+10-9+8-7+6-5+4-3+2-1=18
2007-08-18 6:25 am
9+8-7+6-5+4-3+2-1+10-9+8-7+6-5+4-3+2-1
=(9+8-7+6-5+4-3+2-1)+(10-9+8-7+6-5+4-3+2-1)
=13+5
=18
=(9+8-7+6-5+4-3+2-1)+(10-9+8-7+6-5+4-3+2-1)
=13+5
=18
參考: me
2007-08-18 6:22 am
9+8-7+6-5+4-3+2-1+10-9+8-7+6-5+4-3+2-1= 18
2007-08-18 5:57 am
9+8-7+6-5+4-3+2-1+10-9+8-7+6-5+4-3+2-1
=22
I hope I can help you!
2007-08-17 21:58:32 補充：
sorry,is =18
=22
I hope I can help you!
2007-08-17 21:58:32 補充：
sorry,is =18
參考: me
收錄日期: 2021-04-13 12:58:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070817000051KK05224