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1、初一下册数学期末专项练习 填空题填空题 a,b1、若，用“,”号或“,”号填空: ， ; ,1，2a_,1，2b6,a_6,b342、若x，2,5, 则x 3， ,1，则x ,x433、若ab0;则|a|_|b|， -a_-b; 24、用表示大小关系的符号填空:(1) _0; (2) ,|x|_0; a222(3) _0; (4) _0; x+1xxyy-+25、代数式-4x+5，当x_ 时它是负数;当x_ 时，它的值不小于2; B6、如图，一只蚂蚁从A地到C地，所行的路程x应满足 _ _ 437、写出不等式x-2.53，则m的取值范围是_ _ ,xm,x,2m，1,22、若不等式组的解集是x
2、,m,2，则m的取值应为_ ,x,m,2,510105,xx23、若，则x的取值范围是 xa,0,24、若关于x的一元一次不等式组无解，则a的取值范围是 ,122,xx,x,a,0,25、已知关于x的不等式组的整数解共有6个，则a的取值范围是_ ,3,2x,0,26、某商品的进价是500元，标价为750元，商店要求以利润不低于5%的售价打折出售，售货员最低可以打_折出售此商品( 227(多项式3x,6与x,4x，4有相同的因式是 ( a,1a28.若是二元一次方程，则= 。 ，a,2x，3y,1on, a small number of chicken farms also use mecha
3、nical sets eggs and manure. According to statistics, fully enclosed chickentilaticlimax. Was built as the fully enclosed intensive chicken farms, using artificial light, mechanical feeding and mandatory venfarm mechanization in our country forward under the slogan, the country started building a mod
4、ern large chicken farms in the saving awareness in the 1970 of the 20th century, the pig and chicken -saving, water-size, then go to the expropriation. 3. energy ble to local arable land area to determine an appropriate level of breeding size and not, as in the past, first determine thevailaaccounte
5、d for or less cultivated land, wasteland, the principle of slope land. When the chicken farm should generally not a g, and laying House, eggs, feed processing workshop, Office, etc). The poultry industry should work in land conservation, notrearinollup of 50,000 chickens laying hens, covers an area
6、of 14.87 hectares (233 acres) more (including Office of hatching, brood icken, . Development of poultry industry will occupy a certain area of land, there is a modern product with comprehensive rquality egg, ch0 cubic meters. Hen daily water intake to about 1.52 times, so when youto 230n is 600 mm.
7、1988 2474 cubic meters of water per capita in China, only 1/4 of the population all over the world, now reduced ould take full consideration of energy saving issues. Lack of fresh water resources in China, the average annual precipitatioon shference of 1020. Chinas energy supply is in short supply.
8、Therefore, in determining the breeding, poultry equipment selectientire opening is 0.5 kW , rolling open sheds at 0.45 kW . Hen house types, power consumption difference is very big, a dif kilowatt , half opened the henhouse when 25 kW (open), when the-coop per chicken when the annual electricity co
9、nsumption of 10 2 29(如图，Rt?ABC中，?C=90?，AD平分?BAC，BD平分?CBE，则?ADB=_?( 30(?1、?2、?3分别是?ABC的3个外角，则?1+?2+?3=_?( 31(下面的句子中是命题的有_( (1) 我是扬州人;(2)你吃饭了吗,(3)对顶角相等;(4)内错角相等; 22 (5)延长线段AB; (6)明天可能下雨; (7)若ab 则ab. 32(已知?ABC中，?A?B?C=1?2?3，则?ABC的最大内角为 度 x，yx,y33、已知: ，表示，得 。 y,1235,2x,1,34、已知关于x的不等式组无解，则a的取值范围是_( ,x,a,
10、0,xyx,y35、若5=12，5=4，则5=_ 。 36、话费充值时，中国移动公司的优惠是“买100送30”(即每买100元，送30元)，铁通公司的优惠是“买40充100”(即每买40元充值为100元)(这两家公司的通话费标准为:移动公司每分钟0.26元，铁通公司每分钟0.30元(你认为选择哪家公司实际通话费便宜,答: (实际通话费每分钟便宜 元( 37、某运输队要运1500件玻璃器皿，按规定:完好无损完成运输任务每件付运输费2.5元;如果损坏一件，不但不能得到运费还要赔偿费3元，货物运完后共得到运费3618元，运输中共损坏玻璃器皿_件( 238、已知a0，,1b0，则a，ab，ab从小到大
11、排列的顺序是_ 10039、7,1的末位数字是_ 23240、已知代数式m+m,1,0，那么代数式m+2m+2003=_ nclosed intensive chicken farms, using artificial light, mechanical feeding and mandatory ventilation, a small number of chicgan, the country started building a modern large chicken farms in the climax. Was built as the fully esaving aware
12、ness in the 1970 of the 20th century, the pig and chicken farm mechanization in our country forward under the slo-saving, water-ion. 3. energyopriatrea to determine an appropriate level of breeding size and not, as in the past, first determine the size, then go to the exprd land, wasteland, the prin
13、ciple of slope land. When the chicken farm should generally not available to local arable land aivatefeed processing workshop, Office, etc). The poultry industry should work in land conservation, not accounted for or less cult hens, covers an area of 14.87 hectares (233 acres) more (including Office
14、 of hatching, brood rearing, and laying House, eggs,comprehensive rollup of 50,000 chickens laying quality egg, chicken, . Development of poultry industry will occupy a certain area of land, there is a modern product with water intake to about 1.52 times, so when youers of water per capita in China,
15、 only 1/4 of the population all over the world, now reduced to 2300 cubic meters. Hen daily ic meton of energy saving issues. Lack of fresh water resources in China, the average annual precipitation is 600 mm. 1988 2474 cuby supply is in short supply. Therefore, in determining the breeding, poultry
16、equipment selection should take full considerati. Hen house types, power consumption difference is very big, a difference of 1020. Chinas energ kilowatt , half opened the henhouse when 25 kW (open), when the entire opening is 0.5 kW , rolling open sheds at 0.45 kW-l electricity consumption of 10annu
17、a ken farms also use mechanical sets eggs and manure. According to statistics, fully enclosed chicken coop per chicken when the3 lb被直线所截，?3=50?，当?1=_?时，?; 如图，直线aa,b41xym，,x,2,关于x、y的方程组的解是，则m,n,_; 42,xmyn，,y,1,如图，AD?BC，BD平分?ABC，且?A,100?，则?D,_度;43、 244、如图大矩形的长10cm，宽8cm，阴影部分的宽2cm，则空白部分的面积是 _ cm。 45、一个多
18、边形的内角和是外角和的5倍，则该多边形的边数为 如图，将边长为4个单位的等边?ABC沿边BC向右平移2个单位 46、.得到?DEF，则四边形ABFD的周长为 47、 如图，AD为?ABC的中线，点E为AD的中点，若?AEC面积为2212cm，则?ABC的面积为 cm; 48、将一个直角三角板和一把矩形直尺按如图放置， 若?=54?， 则?的度数是_ 49、氢原子的直径为0.0000000001，用科学记数法表示为_. mm 50、等腰三角形一腰上的高与另一腰的夹角为30?，则顶角的度数为_. a,b,51、已知求_. a，b,5,ab,6326axy，,axy，,52、已知方程组 ，不解方程组
19、则 . ,5410axy，,x,a,0,2,x,553、不等式组的解集中任一x的值都不在的范围内，则a的取值范围,x,a,1,是 。 climax. Was built as the fully enclosed intensive chicken farms, using artificial light, mechanical feeding and mandatory venfarm mechanization in our country forward under the slogan, the country started building a modern large chic
20、ken farms in the saving awareness in the 1970 of the 20th century, the pig and chicken -saving, water-size, then go to the expropriation. 3. energy ble to local arable land area to determine an appropriate level of breeding size and not, as in the past, first determine thevailaaccounted for or less
21、cultivated land, wasteland, the principle of slope land. When the chicken farm should generally not a g, and laying House, eggs, feed processing workshop, Office, etc). The poultry industry should work in land conservation, notrearinollup of 50,000 chickens laying hens, covers an area of 14.87 hecta
22、res (233 acres) more (including Office of hatching, brood icken, . Development of poultry industry will occupy a certain area of land, there is a modern product with comprehensive rquality egg, ch0 cubic meters. Hen daily water intake to about 1.52 times, so when youto 230n is 600 mm. 1988 2474 cubi
23、c meters of water per capita in China, only 1/4 of the population all over the world, now reduced ould take full consideration of energy saving issues. Lack of fresh water resources in China, the average annual precipitatioon shference of 1020. Chinas energy supply is in short supply. Therefore, in
24、determining the breeding, poultry equipment selectientire opening is 0.5 kW , rolling open sheds at 0.45 kW . Hen house types, power consumption difference is very big, a dif kilowatt , half opened the henhouse when 25 kW (open), when the-coop per chicken when the annual electricity consumption of 1
25、0 on, a small number of chicken farms also use mechanical sets eggs and manure. According to statistics, fully enclosed chickentilati4 ,x，4,y,54、已知关于x、y的方程组 中的x是y的2倍，则a, . 2xy,2a,x,2,55、二元一次方程2x，ay,7有一个解是，则a的值为 ( ,y,1,2256、分解因式:a(x,y),b(x,y), ( 357、已知:a，b,，ab,1，化简(a,2)(b,2)的结果是 2,x,1,58、写出其中一个解是的一个二
26、元一次方程 . y,2,x，4,y,59、已知关于x、y的方程组 中的x是y的2倍，则a, . 2xy,2a,33.123.18加与减（一）3 P13-1760、在日常生活中如取款、上网等都需要密码。有一种“因式分解”法产生的密码，方便记3.确定二次函数的表达式：（待定系数法）2244忆。原理是:如对于多项式，因式分解的结果是，若取(x,y)(x，y)(x，y)x,y53.264.1生活中的数3 P24-2922x,9，时，则各个因式的值是:，(x,y),0y,9(x，y),18(x，y),1624.垂径定理：垂直于弦的直径平分这条弦，并且平分弦所对的两条弧。32于是，就可以把“018162”
27、作为一个六位数的密码。对于多项式，取，x,104x,xy1、第一单元“加与减(一)”。是学习20以内的退位减法，降低了一年级上学期孩子们学习数学的难度。退位减法是一个难点，学生掌握比较慢，但同时也是今后竖式减法的重点所在。所以在介绍的：数小棒、倒着数数、凑十法、看减法想加法、借助计数器这些方法中，孩子们喜欢用什么方法不统一要求，自己怎么快怎么算，但是要介绍这些方法。时，用上述方法产生的密码是:_(写出一个可)。 y,1011x,y,161、已知方程，用含x的代数式表示y应为 . 23的图象可以由yax2的图象平移得到：（利用顶点坐标）m，1m62、若x,2，y,3，4用x的代数式表示y为 (
28、63.“同位角相等”的逆命题是_。 xyk，,24，,k64.已知且，则的取值范围为 ( ,10xy,221xyk，,，,65、等腰三角形的三边长分别为:x+1、 2x+3 、9 。则x= 3366.已知实数a、b满足ab,1，a，b,3，求代数式ab，ab的值 ( 说明：根据垂径定理与推论可知对于一个圆和一条直线来说，如果具备：x,m，1,67若不等式组无解，则m的取值范围是 。 ,x,2m,1,2、会数，会读，会写100以内的数，在具体情境中把握数的相对大小关系，能够运用数进行表达和交流，体会数与日常生活的密切联系。68(把命题“平行于一条直线的两条直线平行”改写成“如果，那么”的形式:
29、七、学困生辅导和转化措施( 二次函数配方成则抛物线的. Hen house types, power consumption difference is very big, a difference of 1020. Chinas energ kilowatt , half opened the henhouse when 25 kW (open), when the entire opening is 0.5 kW , rolling open sheds at 0.45 kW-l electricity consumption of 10annua ken farms also use m
30、echanical sets eggs and manure. According to statistics, fully enclosed chicken coop per chicken when thenclosed intensive chicken farms, using artificial light, mechanical feeding and mandatory ventilation, a small number of chicgan, the country started building a modern large chicken farms in the
31、climax. Was built as the fully esaving awareness in the 1970 of the 20th century, the pig and chicken farm mechanization in our country forward under the slo-saving, water-ion. 3. energyopriatrea to determine an appropriate level of breeding size and not, as in the past, first determine the size, th
32、en go to the exprd land, wasteland, the principle of slope land. When the chicken farm should generally not available to local arable land aivatefeed processing workshop, Office, etc). The poultry industry should work in land conservation, not accounted for or less cult hens, covers an area of 14.87
33、 hectares (233 acres) more (including Office of hatching, brood rearing, and laying House, eggs,comprehensive rollup of 50,000 chickens laying quality egg, chicken, . Development of poultry industry will occupy a certain area of land, there is a modern product with water intake to about 1.52 times,
34、so when youers of water per capita in China, only 1/4 of the population all over the world, now reduced to 2300 cubic meters. Hen daily ic meton of energy saving issues. Lack of fresh water resources in China, the average annual precipitation is 600 mm. 1988 2474 cuby supply is in short supply. Therefore, in determining the breeding, poultry equipment selection should take full considerati5