係咪打錯做P3咋？:L :L
原帖由 Terence 於 2007-11-8 14:06 發表 http://www.post76.com/discuss/images/common/back.gif
係咪打錯做P3咋？:L :L
This is original question.
CrazySmilies015
原帖由 ronaldlaw 於 2007-11-8 13:10 發表 http://www.post76.com/discuss/images/common/back.gif
do you got similar questions from your son/daughter ?
有~
不過會比埋其中一個數的~
例:
A=100
B=?
C=?
D=?
原帖由 kennykky 於 2007-11-8 13:39 發表 http://www.post76.com/discuss/images/common/back.gif
其實好easy
1,b出現過3次,3個答案都有30,b無出現個答覆就無30,所以b=30
2,a出現過係最大同最細o既答案,所以我假設佢係=100先,咁a+b+d=330就變做100+30+d=330
3,d就係上面計過啦=200,而家只要計a+c+d=800變做100+c+ ...
強!!! Smilies018
我個方法同你唔同~
A + B + C = 630
D + B + C = 730
A + B + D = 330
A + C + D = 800
C>D>A>B
C>D 300
C>A 400
C>B 470
D>A 100
D>B 170
A>B 70
A=100
B=30
C=500
D=200
原帖由 ssss41357 於 2007-11-8 04:09 PM 發表 http://www.post76.com/discuss/images/common/back.gif
強!!! Smilies018
我個方法同你唔同~
A + B + C = 630
D + B + C = 730
A + B + D = 330
A + C + D = 800
C>D>A>B
C>D 300
C>A 400
C>B 470
D>A 100
D>B 170
A>B 70
A=100
B=30
C=500
D=200 ...
我明你個方法,但係如果教小朋友o既話我果個會好d,佢地會易明d
原帖由 ronaldlaw 於 2007-11-8 02:32 PM 發表 http://www.post76.com/discuss/images/common/back.gif
This is original question.
荃官....明校wor,問題有d難度唔出奇,如果係普通小學就好有問題
原帖由 kennykky 於 2007-11-8 16:22 發表 http://www.post76.com/discuss/images/common/back.gif
我明你個方法,但係如果教小朋友o既話我果個會好d,佢地會易明d
所以咪話你強囉~ Smilies010
我用小三代數蠢方法咋.
A + B + C = 630
D + B + C = 730 =>D - A = 100 => D = 100 + A
D + B + C = 730
A + B + D = 330 => C - A = 400 => C = 400 + A
代入A + C + D = 800 => A = 100.
原帖由 kennykky 於 2007-11-8 13:39 發表 http://www.post76.com/discuss/images/common/back.gif
其實好easy
1,b出現過3次,3個答案都有30,b無出現個答覆就無30,所以b=30
2,a出現過係最大同最細o既答案,所以我假設佢係=100先,咁a+b+d=330就變做100+30+d=330
3,d就係上面計過啦=200,而家只要計a+c+d=800變做100+c+ ...
你以前玩數學奧林匹克架? Smilies014
