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relationship, established equivalent relationship 14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application problem of key is: according to meaning, (1) determine standard volume (units \hen in-line solution. Category fraction multiplication word problem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of capacity, measuremeunits of measurement of common units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle angle of classification (slightly) 17, and subject: geometry preliminary knowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combination graphics of area subject : Preliminary knt and nowledge (3)-review of solid content category 1-d shapes are divided into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features of cuboids and cubes relationship between characteristics of circular cone is slightly solid surface area and volume 1, size 2, table ...和阜宁县陈集中学七年级数学国庆假期作业（1）

一、精心选一选(请将正确答案的序号填在括号里．每题2分，共20分) 1．计算(?3)2的结果是（ ）．

A．－6 B．9 C．－9 D．6

2． ?1的倒数是( ) 2 12A．2 B．－2 C． D．?1 23． (?1)2009的相反数是（ ）

A．1 B．?1 C．2009 D．?2009 4．若x?(?2)?3，则x的倒数是（ ） A．?11 B．

662 C．?6 D．6

5．若a、b互为相反数，c、d互为倒数，m的绝对值为2，

a?b 的值为 （ ） m A、?3 B、3 C、?5 D、3或?5

则代数式m?cd?6．某市在一次扶贫助残活动中，共捐款元．将元用科学记数法表示为（ ）

A．2.58?107元 B．0.258?107元 C．2.58?106元 D．25.8?106元

7．实数a，b在数轴上的对应点如图所示，则下列不等式中错误的是（ ） ．．

A．ab?0 B．a?b?0 C．

a b 0 a?1D．a?b?0 b

8.被减数是11的相反数,减数是2的倒数,它们的差是( ) 2 A. 1 B.?1 C.2 D.?2

9.四个互不相等整数的积为9,则和为( )

A.9 B.6 C.0 D.?3 10.下列各组运算中,其值最小的是( )

A.?(?3?2) B.(?3)?(?2) C.(?3)?(?2) D.(?3)?(?2)

二、细心填一填(请将正确答案直接填在相应的空格内．每题2分，共16分)

11. 绝对值小于2.5的整数有 ,它们的积为 ;

12. 某次数学测验共20道选择题,规则是:选对一道的5分,选错一道的－1分,不选得零分,王明同学的卷

面成绩是:选对16道题,选错2道题,有2道题未做,他的得分是 . 13．平方等于4的数是 ．

14．一种商品原价120元，按八折（即原价的80%）出售，则现售价应为 __________元． 15.“24”点游戏，用3、4、-6、10凑成24点（每一个数只用一次），算式是__ _______.

2222?m、?16.已知，m<-1，用“＜”连结：m、、1m1 ________________________. mrelationship, established equivalent relationship 14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application problem of key is: according to meaning, (1) determine standard volume (units \hen in-line solution. Category fraction multiplication word problem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of capacity, measuremeunits of measurement of common units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle angle of classification (slightly) 17, and subject: geometry preliminary knowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combination graphics of area subject : Preliminary knt and nowledge (3)-review of solid content category 1-d shapes are divided into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features of cuboids and cubes relationship between characteristics of circular cone is slightly solid surface area and volume 1, size 2, table ...和3＝9，3＝27，3＝81，3＝243，3＝729，3＝2187，??推测3的个位数字是________. 17.已知3＝3，123456720

18.若|a-1|+(b+2)2=0，(a+b)2013+a2012=

。

三、用心做一做(本大题共6小题，共44分 ,19题每小题2分,20至24题每题6分) 19. （1）－32

= ; （2）(?5)33=_____________;

（3） (?6)?7=___________; (4) 48?(?8)=______________; (5) ?23?(?1)5?(?2)=_______ ;

(6) 0.25?(?2.15)?0.75?(?2.15)=____;

（7）(?4)?(?124)?(?0.25)= . 20. 25??112?(?214)?(?2.75)

21. 10?(?2)2?(?5)

22． (?3574?9?12)?136

2

relationship, established equivalent relationship 14, and subject: application problem (4)--scores and percentage application problem review content overview answers scores, and percentage application problem of key is: according to meaning, (1) determine standard volume (units \orresponds to\hen in-line solution. Category fraction multiplication word problem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of capacity, measuremeunits of measurement of common units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)--line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle angle of classification (slightly) 17, and subject: geometry preliminary knowledge (2)--plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combination graphics of area subject : Preliminary knt and nowledge (3)-review of solid content category 1-d shapes are divided into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features of cuboids and cubes relationship between characteristics of circular cone is slightly solid surface area and volume 1, size 2, table ...和 23.

(?711)?8 1722?1.6?[(?)?(?3)3?22] 24.

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四、大胆试一试(本大题共2小题，每小题10分，共20分)

25．某球迷协会组织36名球迷拟租乘汽车赴比赛场地，为首次打进世界杯决赛圈的国家足球队加油助威。可租用的汽车有两种：一种每辆可乘8人，另一种每辆可乘4人，要求租用的车子不留空座，也不超载。

① 请你给出不同的租车方案（至少三种）;

② 若8个座位的车子的租金是300元/天，4个座位的车子的租金是200元/天,请你设计出费用

最少的租车方案，并说明理由。

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