苏科版七年级数学下册第8章幂的运算第一次月考复习题汇编(一)

适用年级:初一
试卷号:625288

试卷类型:专题练习
试卷考试时间:2018/4/6

1.单选题(共9题)

1.
若a=-0.32,b=-3-2,c=()-2,d=()0,则a、b、c、d大小关系正确的是(    )
A.a<b<c<dB.b<a<d<c
C.a<d<c<bD.c<a<d<b
2.
这三个数按从小到大的顺序排列,正确的结果是(  )
A.B.
C.D.
3.
生物具有遗传多样性,遗传信息大多储存在DNA分子上,一个DNA分子直径约为0.000000201cm,这个数量用科学记数法可表示为(  )
A.cmB.cmC.cmD.cm
4.
如果,那么的大小关系为(  )
A.B.C.D.
5.
下列计算正确的是(  )
A.B.C.D.
6.
下列计算正确的是(  )
A.B.
C.D.
7.
如果,那么(  )
A.B.C.D.
8.
对于等式:(1);(2)判断正确的是(  )
A.(1)正确B.(2)正确C.都正确D.无法判断
9.
下列运算正确的是(  )
A.B.C.D.

2.选择题(共1题)

10.

根据短文理解, 从A、B、C、D四个选项中选择最佳答案填空。

    An old friend from the US whom I was looking forward to staying with telephoned from the airport to tell me that he had arrived. I was still at the 1  at that time, but I had got everything ready for his arrival. After letting him know where my house was, I told him that I had left the  2under the doormat(门垫),  3  I was likely to be home rather late. I told him to go into the 4 and help himself to food and drink. Two hours later my friend 5 me from the house. At the moment, he said, he was listening to some of my records after having just had a truly wonderful 6 . He had found a cooker and  7  two eggs and he helped himself to some cold chicken from the ice box. He said he was drinking a glass of orange juice and he hoped I would 8him. When I asked him if he had reached the house without difficulty, he answered, "I was not able to find the key,  9 luckily, the living-room windows Just by the apple tree were left open and you know what I could do." I listened to all this in 10 . In front of my living-room there was no apple tree at all.

3.填空题(共9题)

11.
某种感冒病毒的直径是0.000000132米,用科学记数法表示为__________米.
12.
计算:________.
13.
若(x-)0没有意义,则x-2的值为____.
14.
某种感冒病毒的直径是0.000000712米,用科学记数法表示为_____米.
15.
已知,那么之间满足的等量关系是_____________.
16.
计算:_______.
17.
已知= __________
18.
计算:__________.
19.
比较大小:_____

4.解答题(共10题)

20.
阅读解答:
(1)填空:


(2)探索(1)中式子的规律,试写出第个等式,并说明第个等式成立.
(3)计算:
21.
探究:



……
(1)请仔细观察,写出第4个等式;
(2)请你找规律,写出第n个等式;
(3)计算:
22.
计算:
(1)
(2)
(3)
23.
(1)已知,求:
的值;
的值;
(2)已知,求的值
24.
已知,求的值.
25.
(1)已知,求的值.
(2)已知,先化简,再求该式的值.
26.
小明学习了“第八章 幂的运算”后做这样一道题:若,求的值.他解出来的结果为,老师说小明考虑问题不全面,聪明的你能帮助小明解决这个问题吗?
小明解答过程如下:
解:因为1的任何次幂为1,所以.且
,所以
你的解答是:
27.
小明学习了“第八章 幂的运算”后做这样一道题:“已知:,求的值.”,他解出来的结果为,老师说小明考虑问题不全面,聪明的你能帮助小明解决这个问题吗?请你写出完整的解答过程.
28.
计算:
(1)
(2)
(3)  
(4)
29.
计算:
(1)   
(2)
(3) 
(4)
试卷分析
  • 【1】题量占比

    单选题:(9道)

    选择题:(1道)

    填空题:(9道)

    解答题:(10道)

  • 【2】:难度分析

    1星难题:0

    2星难题:0

    3星难题:0

    4星难题:0

    5星难题:0

    6星难题:2

    7星难题:0

    8星难题:8

    9星难题:18