做功課的時候有d Questions唔明,,希望各位可以解答,,THz~
1(a) If 1/2:1=1:χ,find the value of χ.
(b)If 5:1/3=χ:1, find the value of χ.
(c) If 1/4:3/4=1:χ,find the value of χ.
2(a)If 0.9:2=9:z, find the value of z.
(b)If z:0.4=0.2:0.5, find the value of z.
3(a)If 3:4=12:y, find the value of y.
(b)If y:10=9:5, find the value of y.
就係甘多...唔係要答案,,要step步驟=]]THzz
２０點~急..急..中一數學練習,,請教各位
2008-03-25 12:57 am
回答 (3)
2008-03-25 1:38 am
✔ 最佳答案
1a) 1/2:1=1:x1/2=1:x
x=2
b) 5:1/3=x:1
15:1=x:1
x=15
c) 1/4:3/4=1:x
1/3=1/x
x=3
2a)0.9/2=9:z
9/20=9:z
z=20
b) z:0.4=0.2:0.5
z=0.4x0.2/0.5
=0.08/0.5
=0.16
3a)3:4=12:y
12:16=12:y
y=16
b)y:10=9:5
y:10=18:10
y=18
2008-03-25 1:50 am
1(a)1Ｘ1=1/2.x, x=2 (b)1/3.x=5Ｘ1, x=15 (c)1/4.x=3/4Ｘ1, x=3 2(a)0.9z=2Ｘ9, z=18 (b)0.5z=0.4乂0.2, z=0.16 3(a)3y=4乂12, y=16, (b)5y=9Ｘ10, y=18
2008-03-25 1:44 am
1a.
1/2:1=1:x
1:1(2)=1:x
x=2
1b.
5:1/3=x:1
5(3):1=x:1
x=15
1c.
1/4:3/4=1:x
1:3=1:x
x=3
2a.
0.9:2=9:Z
9:20=9:Z
Z=20
2b.
z:0.4=0.2:0.5
5z:2=0.8:2
5z=0.8
z=0.8/5
z=0.16
3a.
3:4=12:y
12:16=12:y
y=16
3b.
y:10=9:5
y:10=18:10
y=18
1/2:1=1:x
1:1(2)=1:x
x=2
1b.
5:1/3=x:1
5(3):1=x:1
x=15
1c.
1/4:3/4=1:x
1:3=1:x
x=3
2a.
0.9:2=9:Z
9:20=9:Z
Z=20
2b.
z:0.4=0.2:0.5
5z:2=0.8:2
5z=0.8
z=0.8/5
z=0.16
3a.
3:4=12:y
12:16=12:y
y=16
3b.
y:10=9:5
y:10=18:10
y=18
收錄日期: 2021-04-15 18:25:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080324000051KK02256