1下 3-2 正比與反比
Quiz
•
Mathematics
•
7th Grade
•
Hard
康軒數位 康軒數位
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若xy=k,k為定數且k≠0,則x與y的關係為下列何者?
y與x成正比
y與x成反比
x與y成正比,也成反比
x與y不成正比,也不成反比
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
有關距離、速率與時間的敘述,下列何者錯誤?
當距離一定時,時間與速率成反比
當時間一定時,速率與距離成反比
當速率一定時,時間與距離成正比
當時間一定時,速率與距離成正比
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列敘述中,哪兩種量成正比關係?
距離一定,走的時間與速率
三角形底邊長一定,高與面積
矩形面積一定,長與寬
矩形周長一定,長與寬
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列x與y的關係式中,何者的x與y成正比?
x:2=y:5
x:3=(-1):y
xy=40
y=x+7
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列敘述中,x與y的關係成正比的有a個,成反比有b個,則a×b=?
(1)一罐飲料x元,買了一打共y元
(2)長10公分,寬x公分,面積y平方公分的矩形
(3)時速x公里,花了y小時,共走了230公里
(4)半徑x公分,面積y平方公分的圓
(5)重量x公斤折合y台斤
(6)xy≠0,且x:2=3:y
9
8
6
5
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2004年太魯閣國際馬拉松競賽,弘揚花了3小時30分跑完,小馬花了4小時15分跑完,請問弘揚與小馬兩人的速率比為多少?
弘揚:小馬=17:14
弘揚:小馬=16:7
弘揚:小馬=14:17
弘揚:小馬=7:16
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若x與y成反比,且當x=2時,y=-3,又y與z成反比,且當y=-5時,z=4,則當x=9時,z=?
10
20
30
40
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