數學題（我已知答案，只求式）

1) 4除(3+2)*3=大瓶
4除(3+2)*2=小瓶
2a)40:1000-40
=4:98
=1:24
2b)240:1000+200
=24:120
=1:5
2c)40+200:1000+200-240
=240:980
=24:98
=1:4.083
=1:5

2007-09-13 22:21:47 補充：
Give me the 10 points ok????

2007-09-13 22:22:29 補充：
希望幫到你^^

1)4.0kg/5=0.8kg ( big 3:2 small = 5 )
0.8kgx3=2.4kg ( big 3 )
2.4kg+0.8kg=3.2kg ( big 3 = 3/4 so is 2.4kg + 1/4 (2.4kg / 3 = 0.8kg) so total is 3.2kg )
4.0kg-3.2kg=0.8kg
( so big have 3.2kg. total have 4.0kg so ( 4.0kg - 3.2kg = 0.8kg ) 0.8kg is small )

2)a) 1 : 24
40ml : 960ml ( 1000ml - 40ml = 960ml ) ( 960 / 40 = 24 )

b i don't know what you say??i guss like this

b) 1 : 5
240ml : 1200ml ( 1200 / 240 = 5)
(becoz 200ml + 40ml = 240ml , 1000ml + 200ml = 1200ml )

c) 1 : 4
240ml : 960ml ( 40ml + 200ml ) ( 960 / 240 = 4 )

hope can help you

2007-09-13 22:56:23 補充：
2)c) 240ml : 960ml (40ml 200ml ) (1000ml 200ml = 1200ml , 1200ml - 240ml = 960ml)

我知你知答案, 書後面有家嘛
我仲知你想請槍添

教你做2b, 其他自己試做

在1000mL的酒精和水混合液中，酒精佔40mL
即水佔(1000 - 40)mL = 960mL

現加入200mL酒精, 酒精佔(40 + 200)mL = 240mL
新混合液佔 (1000 + 200)mL = 1200mL

酒精與新混合液之比 = 240:1200
= 240/240:1200/240
= 1:5

2007-09-13 22:23:48 補充：
回第一位: 係三題分題呀, 唔係多項選擇題呀, 咩"我諗係a掛"回第二位: 為o左10分就幫人做功課...

2007-09-16 01:46:33 補充：
我知你知答案, 書後面有家嘛

為o左10分就幫人做功課...