That's the way I told her to get the answer

But her teacher ask her use table only to guess many times until you find the answer. You choose a number first and use addtion to compare with total and guess..

所有跟帖： 

• 嗯。俺娃的老师也是教孩子猜的。也把俺老公气晕了。 -三月花开- ♀ (0 bytes) () 09/19/2007 postreply 12:44:41

• 那就猜，怎么会弄到半夜？一共给猜几次？ -britannica- ♀ (81 bytes) () 09/19/2007 postreply 12:45:33

• 回复：那就猜，怎么会弄到半夜？一共给猜几次？ -cala11- ♀ (259 bytes) () 09/19/2007 postreply 12:56:05

• 不错啊，这个是接近法 -britannica- ♀ (42 bytes) () 09/19/2007 postreply 13:00:58

• 这么接近法子，是不可能发现a+b+(a-b)=2a, a+b-(a-b)=2b的规律所在 -云槎- ♀ (138 bytes) () 09/19/2007 postreply 13:32:14

• 老师要求列表用猜的办法解二元问题是没错的。 -星星河- ♀ (388 bytes) () 09/19/2007 postreply 13:03:37

• 那样的话，最好用小点的数字 -云槎- ♀ (207 bytes) () 09/19/2007 postreply 13:38:22

• 是，不应该太大数字 -星星河- ♀ (188 bytes) () 09/19/2007 postreply 13:43:40