✔ 最佳答案
6÷2(1+2)
=6÷2(3)
=6÷2x3
=3x3
=9!!
上面有條友話可以寫成份數,6over2x3,即係6/2x3.........係白痴!
個3唔係份母.....
括號中的1+2要先計....但隨後6÷2x3....不可先計2x3
小學生的常識.....x,÷不是+,-...怎可胡來?
2011-05-04 00:28:00 補充:
又可以掉轉諗...
若然6÷2(1+2)=1
咁我想用以上數字去計成=9...條式點寫?
******
能計成1的答案:
6÷[2(1+2)]
=6÷(2x3)
=6÷6
=1
******
說6÷2(1+2)不是9的,一是天才;一是笨蛋...
然而,後者居多!!
2011-05-05 20:54:26 補充:
or again
有人鍾意2(1+2)寫成2+4
會變左
6÷2(1+2)
=6÷2+4
=3+4
=7...
更加錯
只能
6÷2(1+2)
=3(1+2)
=3+6
=9!!!
By the way..正確答案在下面條link!!
墾請答1的「天才兒童」惡補小二數學!!
http://hk.apple.nextmedia.com/template/apple/art_main.php?iss_id=20110505&sec_id=15335&subsec_id=15336&art_id=15226153
其實我認為兩個答案都可行, 因為現時o既教育制度促成左兩種睇法。
我自己本身認為係1, 但聽到其他人講係9, 都有佢o既道理。
首先, 我要澄清番一樣野: 我地計到1唔係老作, 亦都唔係唔知「四則運算」o既定義。從我學校和其他數學教科書的「Algebra課程」入面講: (2a+2b)=2(a+b), 2(a+b)係擁有2 factors的一個數。所以, 我地會視 2(1+2)為一個數, 唔係無根據的。
如果你話代數同普通數計法唔同, 咁我就絕對唔認同你。代數同普通計數一樣, 都係咁計, 就好似: 60÷2ab = 60÷2(a)(b), 不嬲都會計到 60/(2ab)
= 30/(ab)
唔會計成 30ab。如果好似你地樓上多數人咁講, 照你地o既計法, 會將60÷2(a)(b)計成30ab,咁就大錯特錯。用到6÷2(1+2)呢條式, 我地用我地o既方法唔顯得有錯。
計番6÷2(1+2), 出現同樣o既問題, 究竟應該用咩野方式計呢? 其實做成我地有兩種計法都係因為香港o既教育。
根據普通人用「四則運算」去計6÷2(1+2):
= 6÷2(1+2)
= 6÷2(3)
= 6÷2x3
= 9
若根據我地學代數o既方式去計6÷2(1+2):
= 6÷2(1+2)
= 6÷2(3)
= 6/6
= 1
然而, 香港教育下沒有將「代數方法2(a+b), 2ab」等解釋清楚, 才會有近150萬人計成1。有位人兄話代數冇咁講過, 我只係想講: 書本、老師根本冇諗過呢個問題, 只是略加解釋...呢種題目係數學o既灰色地帶, 我認同會計到9, 1的說法可能係其他地方有點兒巧妙, 低唔係我地白痴, 一條咁簡單o既數都有近150萬計成1, 會有咁多白痴? 請你諗清楚先好講。
發問者o既疑問, 我相信同全香港人一樣, 唔知到時考試測驗用咩野式好...但係呢種灰色地帶問題我肯定冇人會出。假如真係有, 你可以計哂兩個答案, 姐係case1 and case2, 咁樣係最好的。
最後, 我希望任何人士即使計到唔同答案, 都唔好針對、辱罵別人, 呢樣係好缺德o既行為。
參考: Me, Wiki, School work, teachers, relatives
首先, 繼左( )內ge數,
然後再依照下面ge算式做:
6÷2(1+2)
=6÷2(3) 去到E道, 你可以gum lum
=6÷2x3 or 6÷2x3=6x3÷2
=3x3 =18÷2
=9 =9
希望幫到你!
參考: me
點解樓上D人講既野咁矛盾
講到明有括號計左先,再先乘除後加減
姐係 6÷2(1+2)
=6÷2(3)
=6÷2x3
=3x3
=9
點解D人會話係1?
如過條式係咁: 6÷﹝2(1+2)﹞= ?
=6÷﹝2(3)﹞
=6÷﹝2x3﹞
=6÷6
=1
咁樣先會成立
我再以分數方式講解
6÷2(1+2)
=(6/2)x(1+2)
=(6/2)x3
=18/2
=9
點解會咁寫?
因為條式都無講過係計左2(1+2)先再用6去除
而係6除左2再乘番3
心水清既一望就知喇
希望幫到你喇...
2011-05-02 16:11:02 補充:
睇一睇004個解答:
6÷2(1+2)
= 6÷2(3)
= 6÷(2x3) <<<點解無啦啦會括左(2x3)?個括號自己加上去?咁咪姐係改左條式囉
= 6÷6
= 1
I support the answer 9.
The issue makes many people confusing is here: 6÷2(3).
Some people think that the formula is the same as 6÷(2×3), but it is worng to extend the brackets to cover the figure 2.
⋯⋯In fact, the tricky point is a sign of "×" is misisng between "2" and "(1+2)". If the "×" is added back, there is no confusing at all: 6÷2×(2+1).
In Algebra, sometimes we drop "×" when expressing times sign upon using brackets. For example, (a+1)(b+2) = ab+2a+b+3. But it will be confusing if applies in general numberic equation. We won't simply write 2(3) to represent "2×3".更多
Hope I can help you !
I can tell you the answer is not 9 .
Why ?
Because , the steps are :
6÷2(1+2)
= 6÷2(3)
= 6÷(2x3)
= 6÷6
= 1
Is it interesting ?
參考: By a upto-F.5 New senior secondary Science student