一水池有大小两个进水管,单开大管,15分钟可把水池注满。若两管齐开,12分钟就可把水池注满。问单开小管,需要多少分钟可把水池注满?
初中二数学线上考试

Flashcard
•
Mathematics
•
1st - 12th Grade
•
Hard
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16 questions
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1.
FLASHCARD QUESTION
Front
Back
60分钟
2.
FLASHCARD QUESTION
Front
解方程式 2(x - 3) = 8 - 3 (x-2)。
Back
x=4
3.
FLASHCARD QUESTION
Front
求12,18 及 24的最小公倍数 (L.C.M)。
Back
72
4.
FLASHCARD QUESTION
Front
如果 a=2,b= -3,c= -1,求 (a+b) (a+c) - (b-a) 的值。
Back
4
5.
FLASHCARD QUESTION
Front
因式分解 ad + bc -ac - bd。
Back
(a-b) (d-c)
6.
FLASHCARD QUESTION
Front
什么是最小公倍数?
Back
最小公倍数是能被两个或多个数整除的最小正整数。
7.
FLASHCARD QUESTION
Front
如何解方程式?
Back
通过将未知数移到一边,已知数移到另一边,最后求解未知数。
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