甘肃省张掖市临泽县第二中学2019-2020学年七年级上学期期中数学试题

适用年级:初一
试卷号:567630

试卷类型:期中
试卷考试时间:2019/11/4

1.单选题(共5题)

1.
如图是加工零件的尺寸要求,现有下列直径尺寸的产品(单位:mm),其中不合格的是(  )
A.Φ45.02B.Φ44.9C.Φ44.98D.Φ45.01
2.
如图是一个运算程序的示意图,若开始输入x的值为81,则第2014次输出的结果为()
A.3B.27C.9D.1
3.
一个两位数,个位数字为a,十位数字比个位数字大1,则这个两位数可表示为(  )
A.11a-1B.11a+1
C.11a+10D.11a-10
4.
在排成每行七天的月历表中取下一个方块(如图所示).若所有日期数之和为189,则n的值为( )
A.21B.11C.15D.9
5.
若A+(a+b2-c)=a+c,则A为(  )
A.0B.1C.a+b-cD.2c-b

2.选择题(共3题)

6.阅读理解

    Knowing how much her own children loved presents at Christmas, Ann Sutton always tried to seek help for one or two poor families. With a social worker mother, the Sutton children had inherited her commitment to service, and knew never to take their good fortune at Christmas for granted. This year, Kinzie, her seven-year-old daughter was thrilled that Santa Claus would make a special visit to a 22-year-old mother named Ashley who worked in a factory raising her 12-month-old son by herself.

    The phone rang on Sunday. A representative from a local organization was calling to say that the aid Ann had requested for Ashley had fallen through. No Santa Claus, no presents, nothing.

    Ann saw the cheer vanish from her children's faces at the news. Without a word, Kinzie ran into her bedroom. She returned, her face set with determination. Opening up her piggy bank, she put all the coins onto the table: $3.30. Everything she had.

    “Mom,” she told Ann, “I know it's not much. But maybe this will buy a present for the baby.”

    At a breakfast meeting the next day, Ann told her coworkers about her daughter's story. To her surprise, staff members began to open their purses and empty their pockets to help Kinzie. By day's end, the story of Kinzie's gift had spread beyond Ann's office. She received a call from an unknown donor. If a seven-year-old could give everything she had, he said, he should at least match her gift 100 to 1. He contributed $300.

    On Christmas Eve, Ann drove through the pouring rain to the small trailer where the Ashleys lived. Then she began to unload the gifts from the car, handing them to Ashley one by one.

    Ashley was very moved. Reflecting on a little girl's generosity, Ashley says she'll one day be able to do something similar for someone else in need. “Kinzie could have used that money for herself, but she gave it away,” Ashley says. “She's the type of kid I'd like my son to grow up to be.”

7.阅读理解

    Knowing how much her own children loved presents at Christmas, Ann Sutton always tried to seek help for one or two poor families. With a social worker mother, the Sutton children had inherited her commitment to service, and knew never to take their good fortune at Christmas for granted. This year, Kinzie, her seven-year-old daughter was thrilled that Santa Claus would make a special visit to a 22-year-old mother named Ashley who worked in a factory raising her 12-month-old son by herself.

    The phone rang on Sunday. A representative from a local organization was calling to say that the aid Ann had requested for Ashley had fallen through. No Santa Claus, no presents, nothing.

    Ann saw the cheer vanish from her children's faces at the news. Without a word, Kinzie ran into her bedroom. She returned, her face set with determination. Opening up her piggy bank, she put all the coins onto the table: $3.30. Everything she had.

    “Mom,” she told Ann, “I know it's not much. But maybe this will buy a present for the baby.”

    At a breakfast meeting the next day, Ann told her coworkers about her daughter's story. To her surprise, staff members began to open their purses and empty their pockets to help Kinzie. By day's end, the story of Kinzie's gift had spread beyond Ann's office. She received a call from an unknown donor. If a seven-year-old could give everything she had, he said, he should at least match her gift 100 to 1. He contributed $300.

    On Christmas Eve, Ann drove through the pouring rain to the small trailer where the Ashleys lived. Then she began to unload the gifts from the car, handing them to Ashley one by one.

    Ashley was very moved. Reflecting on a little girl's generosity, Ashley says she'll one day be able to do something similar for someone else in need. “Kinzie could have used that money for herself, but she gave it away,” Ashley says. “She's the type of kid I'd like my son to grow up to be.”

8.阅读理解

    Knowing how much her own children loved presents at Christmas, Ann Sutton always tried to seek help for one or two poor families. With a social worker mother, the Sutton children had inherited her commitment to service, and knew never to take their good fortune at Christmas for granted. This year, Kinzie, her seven-year-old daughter was thrilled that Santa Claus would make a special visit to a 22-year-old mother named Ashley who worked in a factory raising her 12-month-old son by herself.

    The phone rang on Sunday. A representative from a local organization was calling to say that the aid Ann had requested for Ashley had fallen through. No Santa Claus, no presents, nothing.

    Ann saw the cheer vanish from her children's faces at the news. Without a word, Kinzie ran into her bedroom. She returned, her face set with determination. Opening up her piggy bank, she put all the coins onto the table: $3.30. Everything she had.

    “Mom,” she told Ann, “I know it's not much. But maybe this will buy a present for the baby.”

    At a breakfast meeting the next day, Ann told her coworkers about her daughter's story. To her surprise, staff members began to open their purses and empty their pockets to help Kinzie. By day's end, the story of Kinzie's gift had spread beyond Ann's office. She received a call from an unknown donor. If a seven-year-old could give everything she had, he said, he should at least match her gift 100 to 1. He contributed $300.

    On Christmas Eve, Ann drove through the pouring rain to the small trailer where the Ashleys lived. Then she began to unload the gifts from the car, handing them to Ashley one by one.

    Ashley was very moved. Reflecting on a little girl's generosity, Ashley says she'll one day be able to do something similar for someone else in need. “Kinzie could have used that money for herself, but she gave it away,” Ashley says. “She's the type of kid I'd like my son to grow up to be.”

3.填空题(共3题)

9.
在数轴上,与表示﹣1的点距离为5的数____.
10.
现规定一种新运算“*”:a*b=,如3*2==9,则()*3=___________
11.
按规律填空:a,-2a2,3a3,-4a4…则第10个为____.

4.解答题(共3题)

12.
计算:
(1)(1)÷(﹣)+1;
(2);
(3).
13.
某服装厂生产一种西装和领带,西装每套定价200元,领带每条定价40元.厂方在开展促销活动期间,向客户提供两种优惠方案:①买一套西装送一条领带;②西装和领带都按原价的90%付款,现在某客户要到该服装厂购买西装20套,领带x条(x超过20).
(1)若该客户按方案①购买,需付款    元(用含x的代数式表示);
(2)若该客户按方案②购买,需付款 元(用含x的代数式表示);
(3)若x=30,通过计算说明此时按哪种方案购买较为合算?
14.
先化简,再求值.
(1)6a2-5a(a+2b-1)+a(-a+10b)+5,其中a=-1,b=2008;
(2)3xy2﹣[xy﹣2(2xy﹣x2y)+2xy2]+3x2y,其中x、y满足(x+2)2+|y﹣1|=0.
试卷分析
  • 【1】题量占比

    单选题:(5道)

    选择题:(3道)

    填空题:(3道)

    解答题:(3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:0

    7星难题:0

    8星难题:0

    9星难题:11