請教二年級數學題﹐急﹗ 謝謝1

jilin1960

我兒子的數學題
on the first 5 days of their vacation,the law family drove 1,427 miles.they left on friday ,and the minimum day and maximum distances for one day's trip were 200 miles and 355 miles .they arrived at their destination late on Tuesday.

since they left late ,they drove the least number of miles on the first day .
they drove 105 miles more on the second day than on the first day .
on monday they drove the most
on Tuesday they drove 68 miles less than on saturday.
how many miles did they drive each day?

my son's answer is :
friday 200 miles     sun.   305 miles   
sat. 317.5 miles     mon. 355 miles  
Tue. 249.5 miles
老師說星期一﹑星期日和星期五的答案是對的﹐不過星期六和星期二的答案是錯的﹐不應該有小數點﹐請問可以幫忙看看為什么錯嗎﹖  我怎么也沒找出答案錯在哪裡﹐請幫忙﹐非常感謝﹗

2so

I think the correct answer shall be:-
Fri: 200
Sat:305
Sun:330
Mon:355
Tue: 237

May i know which school does your son study in?  is the question too complicated for a P2 kid?

ah-ho

key : on Tuesday they drove 68 miles less than on saturday.

你個小數點答案，應該係當左星期二比星期日少68miles。

moonychan

really complicated

jilin1960

謝謝各位﹐我再將兒子的功課看了一看﹐發現他粗心大意﹐他的列表把星期六和星期天搞錯位置了。變成星期五﹐星期天﹐然後才是星期六﹐所以連帶星期二也出現錯誤。
我也粗心大意﹐沒看出來。

2so

sorry, forgot to show the details:-

Fri: 200 (given, least miles on first day)
Sat:305 (200+105, 105 more miles on second day
Sun:330 (the last answer you get after you've found the miles drove on Tue: 1427-200 -305-355-237)
Mon:355 (given, Monday drove the most)
Tue: 237 (305 -68, 68 miles less than Sat)

jilin1960

剛才那道題﹐對兒子來說不算復雜﹐雖然他算錯﹐不過他在整個運算的過程中﹐很清楚怎么去做﹐只是有點粗心﹐不過﹐接下來這道題﹐我就真有點糊涂了﹐因為我自己本身邏輯很差﹐請大家再幫幫忙。
mrs. chan has just come back from a shopping trip .she bought each child the outfit he or she has asked for .but mrs chan couldn't remember who got which outfit when she emptied he bag ,pls help mrs chan to figure out the proper outfit for each of her child .

the four children are jason  andrew sandy and chelsea.
mrs.chan bought a purple short sleeved shirt and a pair of blue shorts; a pair of jeans and a plaid jacket ;a long pink dress ;a pair of blac tennis shoes and white socks
chelsea wants to borrow the jacket tomorrow.
andrew hated anything in pink
jason lost his only jacket in a field trip 2 weeks ago.
sandy never wore jeans.
sandy and chelsea share a closet.
chelsea and andrew have both just bought new tennis shoes and socks .
sandy already has a pink dress.
andrew and jason can wear each other's clothes.

這道題令我無言﹖對于一個二年級的小朋友﹐他們的邏輯思維是否可以達到如此高深及復雜的階段﹖唉﹗請大家幫忙看看這道題怎么做﹐小兒做錯了一半﹐對了一半。

[ 本帖最後由 jilin1960 於 11-12-14 10:14 編輯 ]

2so

which school does your son study at ar???

A-Mum

may I try?

C, S are girls
J, A are boys

step1. C - pink dress ( because S has one already)
step 2. J - jeans + jacket(he just lost his)
step 3. S - tennis shoes + socks ( because A have them already)
step 4. A - shirt + blue shorts

瑩瑩老豆

小二數學題
那間小學?

原帖由 jilin1960 於 11-12-14 18:10 發表
剛才那道題﹐對兒子來說不算復雜﹐雖然他算錯﹐不過他在整個運算的過程中﹐很清楚怎么去做﹐只是有點粗心﹐不過﹐接下來這道題﹐我就真有點糊涂了﹐因為我自己本身邏輯很差﹐請大家再幫幫忙。
mrs. chan has just come back from a shopp ...

pooh仔

我覺後似奧數多過恒常課程！全部都是邏輯推理！！！

piggynatalie

What a question! Do we really need to teach a P2 student this? I am confused. Well, sleep and tomorrow can read more.. my last holiday.

SEI

I want to know which school as well. Please tell us.

HappyEE

I want to know too

瑩瑩老豆

HappyEE 發表於 12-1-4 13:31
I want to know too

可能係樓主寫少了中學兩個字又貼錯區, 應是"請教中學二年級數學題"吧.
睇返一般小二課本或練習, 那有這類題目呢?

jilin1960

回復 瑩瑩老豆 的帖子

是小學二年級沒錯﹐不過﹐學校絕大部分的數學題都屬于合理范疇﹐例如方向﹐簡單的乘法﹐時間等﹐只不過偶爾飛來這一兩塊大石。幸好小兒說其實並不覺得難﹐可能是我做家長的過于緊張了吧。
至于小兒在哪間學校就讀﹐我覺得還是不便開名。不過﹐這是一間很開心的學校﹐小朋友熱愛閱讀﹐每一個小朋都非常喜歡上學。就學校的課程來講﹐英文程度挺高﹐不過﹐據聽﹐一班小朋友們都應付得綽綽有余﹐我想現在的小朋友可能真的非常棒﹐不能低估他們的能力。數學及中文都屬于合理范圍之內﹐不過﹐學校有一些從國際學校轉來的小朋友﹐相信對于這類小朋友來講﹐中文還是挺有難度的﹐需要下功夫去追。學校的功課與傳統名校比﹐不算多﹐沒有默書﹐不過要求質量高﹐經常有寫作。我自己的孩子﹐英文寫作﹐應付得相當輕松﹐洋洋洒洒﹐過千字都不在話下﹐不過﹐中文寫作就很頭痛了。

無論如何﹐任何一間學校﹐都有適合與不適合之分。我自己的孩子﹐目前來講﹐還是非常喜歡上學的。

仔仔錫錫你

希望唔好有D 家長聽到你話係小二數就走去買呢d練習谷個小朋友吧

DD仔

回復 jilin1960 的帖子

on the first 5 days of their vacation,the law family drove 1,427 miles.they left on friday ,and the minimum day and maximum distances for one day's trip were 200 miles and 355 miles .they arrived at their destination late on Tuesday.

since they left late ,they drove the least number of miles on the first day .
they drove 105 miles more on the second day than on the first day .
on monday they drove the most
on Tuesday they drove 68 miles less than on saturday.
how many miles did they drive each day?

Friday = 200 (min)
Sat = 305 (200+105)
Sun = 330 (1427 - (200+305+355+237))
Mon = 355 (max)
Tue = 237 (305-68)

不知道对否？