急!!(求式+ANS) 中二數學 比 7條

6km=600000cm
3cm:600000cm
3:600000

a=3
b=4

a=7
b=5

a=4
b=5

a:b=3:4
b:c=2:4
b:c=4:8
a:b:c=3:4:8

1/10:1/6:1/5
=(1/10:1/6:1/5)x30
=3:5:6

7 is it a part and b part?

把200支筆分給A,B,C三人 ,比例是1:3:4
a=200x(1/8)
=25
b=200x(3/8)
=75
c=200x(4/8)
=100

20/(4/8)
=100

2010-09-26 19:35:27 補充：
20/(4/8)
=40

sorry

2010-09-26 19:35:51 補充：
3:600000
=1:200000

2010-09-26 19:38:44 補充：
2,3的計算方法是將5:7二個數調轉
所以a=7
=5

1. 3cm:6km
3: 600000
1:200000

2/3 唔明

4. 5a=4b
a/b= 4/5
a:b =4:5

5. a:b =3:4
b:c =2:4
a:b:c= 3:4:8
6 10a=6b=5c
10a=6b
a:b =6:10
b:c =5:6
a:b:c = 6:10:12
=3:5:6

7
A:B:C =1:3:4
'.' C=20pencils
.'. A=5
B=15

唔知你係咪要LE樣野...? --> A+B+C= 40 ?