1+2+3+4+5+6+8+9+10+11+12=???
Careful, because you can do like this:
(1+12)x12/2
=13x12/2
=13x6
=78
No, no, no, because it is 1+2+3+4+5+6+8+9+10+11+12, no ''7'' in the middle. So, who can give me the correct answer? Please give the answer as fast as you can. The fastest and correct one could have 5+5 points ( 10 pionts ), so you must be quick.
Easy Maths
2008-02-11 9:12 pm
回答 (6)
2008-02-12 6:46 am
Easy Maths
1+2+3+4+5+6+8+9+10+11+12=???
Careful, because you can do like this:
(1+12)x12/2
=13x12/2
=13x6
=78
No, no, no, because it is 1+2+3+4+5+6+8+9+10+11+12, no ''7''; in the middle. So, who can give me the correct answer? Please give the answer as fast as you can. The fastest and correct one could have 5+5 points ( 10 pionts ), so you must be quick.
1+2+3+4+5+6+8+9+10+11+12
=(1+12)*12/2-7
=13*12/2-7
=13*6-7
=78-7
=71
1+2+3+4+5+6+8+9+10+11+12=???
Careful, because you can do like this:
(1+12)x12/2
=13x12/2
=13x6
=78
No, no, no, because it is 1+2+3+4+5+6+8+9+10+11+12, no ''7''; in the middle. So, who can give me the correct answer? Please give the answer as fast as you can. The fastest and correct one could have 5+5 points ( 10 pionts ), so you must be quick.
1+2+3+4+5+6+8+9+10+11+12
=(1+12)*12/2-7
=13*12/2-7
=13*6-7
=78-7
=71
參考: myself
2008-02-11 9:27 pm
1+2+3+4+5+6+8+9+10+11+12=???
Careful, because you can do like this:
(1+12)x12/2 - 7
=13x12/2 - 7
=13x6 - 7
=78 - 7
= 71
Careful, because you can do like this:
(1+12)x12/2 - 7
=13x12/2 - 7
=13x6 - 7
=78 - 7
= 71
2008-02-11 9:25 pm
1+2+3+4+5+6+8+9+10+11+12
=(1+12)+(2+11)+(3+10)+(4+9)+(5+8)+6
=13+13+13+13+13+7
=13x4+7
=71//
=(1+12)+(2+11)+(3+10)+(4+9)+(5+8)+6
=13+13+13+13+13+7
=13x4+7
=71//
收錄日期: 2021-04-27 12:07:55
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080211000051KK01392