自由講場

跳至

首頁
1

尾頁
   0


大宅

積分: 3025


發表於 05-11-6 22:15 |顯示全部帖子

urgent, 小四數學題...

小女子自幼數學其差, 不能幫上女兒忙, 請各位指點指點. :lol:

有100隻楊桃, 分給100隻猴子, 剛好分完, 每隻大猴子分得楊桃3隻, 而每3隻小猴子只分得1隻楊桃, 問大, 小猴子各有多少隻???


大宅

積分: 3321


發表於 05-11-6 22:21 |顯示全部帖子

Re: urgent, 小四數學題...

大:25只, 小:75只


大宅

積分: 3025


發表於 05-11-6 22:22 |顯示全部帖子

Re: urgent, 小四數學題...

點計ga???


大宅

積分: 1503


發表於 05-11-6 22:27 |顯示全部帖子

Re: urgent, 小四數學題...

My husband said the answer should be this :

30 Big monkeys got 90 peaches, then
30 small monkeys got 10 peaches.

I think this is right.


民房

積分: 144


發表於 05-11-6 22:30 |顯示全部帖子

Re: urgent, 小四數學題...

設 X = 小猴數目

3(100-X)+(X / 3)=100
X=75

i.e. 大猴有25隻, 小猴有75隻.


水晶宮

積分: 73741

2020勳章


發表於 05-11-6 22:30 |顯示全部帖子

Re: urgent, 小四數學題...

Ianmammy 寫道:
My husband said the answer should be this :

30 Big monkeys got 90 peaches, then
30 small monkeys got 10 peaches.

I think this is right.


你老公殺了40隻猴子?


大宅

積分: 1503


發表於 05-11-6 22:35 |顯示全部帖子

Re: urgent, 小四數學題...

Oh no, my husband maths is not upto P4. No eye see.

The worst thing is --- I trust him. How stupid am I ?


別墅

積分: 603


發表於 05-11-6 22:36 |顯示全部帖子

Re: urgent, 小四數學題...

Let x be the number of big monkey
Let y be the number of small monkey

x+y=100 (equation 1)
3x+(1/3)y=100 (equation 2)

From equation 1, y=100-x

Put y=100-x into equation 2

3x+(1/3)(100-x)=100
=>3x+(100/3)-(1/3)x=100
=>(8/3)x+(100/3)=100
=>8x+100=300
=>8x=200
=>x=25 (number of big monkey)

Put x=25 into equation 1
=>25+y=100
=>y=75 (number of small monkey)


男爵府

積分: 7665


發表於 05-11-6 22:37 |顯示全部帖子

Re: urgent, 小四數學題...

好難計..下年都唔知點教彤彤~"~


別墅

積分: 674


發表於 05-11-6 22:39 |顯示全部帖子

Re: urgent, 小四數學題...

del


大宅

積分: 3025


發表於 05-11-6 22:43 |顯示全部帖子

Re: urgent, 小四數學題...

唔好意思, 呢個唔岩, 因30big+30small=60隻, shouldbe 100隻呀..
Ianmammy 寫道:
My husband said the answer should be this :

30 Big monkeys got 90 peaches, then
30 small monkeys got 10 peaches.

I think this is right.
:lol:


大宅

積分: 2122


發表於 05-11-6 22:43 |顯示全部帖子

Re: urgent, 小四數學題...

條數有乜問題?只係一條好普通的代數,100對100的用意只係睇係你心水清唔清!

catz_ang 寫道:

你地唔覺得條問題好似唔對咩????
有100隻楊桃, 分給100隻猴子????


別墅

積分: 603


發表於 05-11-6 22:43 |顯示全部帖子

Re: urgent, 小四數學題...

我當初都以為係有問題,但看清楚題目,係每3隻小猴子只分得1隻楊桃,所以就計到


大宅

積分: 3025


發表於 05-11-6 22:47 |顯示全部帖子

Re: urgent, 小四數學題...

你地真係好正, thanks all


琥珀宮

積分: 161885

好媽媽勳章 醒目開學勳章 畀面勳章 環保接龍勳章 大廚勳章


發表於 05-11-6 22:48 |顯示全部帖子

Re: urgent, 小四數學題...

[size=medium]

首頁
1

尾頁

跳至