求12,18 及 24的最小公倍数 (L.C.M) 。
初中二数学线上考试

Quiz
•
Mathematics
•
1st - 12th Grade
•
Medium
陆筠艳 陆筠艳
Used 327+ times
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
72
84
96
128
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
(-2) [ 3 (11-4) - (6-11) 4 ]=?
0
-82
85
-100
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
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?
40
50
60
70
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如果 a=2,b= -3,c= -1,
求 (a+b) (a+c) - (b-a) 的值。
-2
0
2
4
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
解方程式 2(x - 3) = 8 - 3 (x-2)。
x=2
x=3
x=4
x=5
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
因式分解 ad + bc -ac - bd。
(b-a) (c+d)
(a-b) (d-c)
(a+b) (c+d)
(a-b) (c-d)
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
化简 3 12 + 2 3 - 48
3
2 3
3 3
4 3
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