
7年級-下-正反比
Authored by Yao Jamie
Mathematics
7th Grade
Used 1+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
1.如果a和b成正比,當a變為原來的2倍,b也會變為原來的2倍。
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
2.a和b成正比,可以寫成 a = b + k(其中k是常數)
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
3.若y和x成正比,且x=3時y=12,則x=5時y=20。
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
4.如果一項工作時間和人數成正比,那人數越多,時間越長。
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
5.當x和y成正比時,x ÷ y 的比值會改變。
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
6.如果y和x成正比,且x=2時y=10,則x=5時y是多少?
(A) 15
(B) 20
(C) 25
(D) 30
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
7.下列哪一個式子表示a與b成正比?
(A) a = b + 3
(B) a = 2b
(C) a = b ÷ 2
(D) a = b - 1
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