2014年小学四年级下册数学期末试卷及答案

Delegates, staff: Hello! in the run-up to the Spring Festival, we held one session of four staff representatives Conference 2013-workshop, full back in 2012, careful analysis of the current situation, discuss 2013 development plans. Here, on behalf of my company 2013 work reports to the General Assembly, for consideration. Pillar I, 2012 back in 2012, XX power companies adhere to the partys 17 great spirit for guidance, comprehensively implement the scientific concept of development, promoting cost-leadership strategy, standards, focus on implementation, lean management, continuously improve, smooth present safety situation of enterprise management, business management and control scientific and standardized, and the dedication of staff, manage a harmonious and democratic atmosphere of the good situation. Main indicators are as follows:-the battery indicator: power generation totaled 7.815 billion kWh, beyond the annual budget implementation capacity of 315 million kWh, an increase of 757 million kWh. Sales totaled 7.425 billion kWh, exceeding sales of 330 million kWh the annual Executive budget, an increase of 729 million kWh. -Security measures: unplanned outages 2.5 times. No personal injury accident occurred, no major accident and above, no major fire accidents without environmental pollution accidents, safety for three consecutive years to maintain stability to good posture. Business financial indicators: total profits of 255 million Yuan, beyond the annual budget of 207 million Yuan, beyond the Datang company index 41.89 million Yuan, an increase of 1.76 million Yuan, FCM assessment at grade four. -Energy: power supply standard coal completing 312.25 g/kWh, down 0.1 g/kWh; integrated auxiliary power consumption ratio in 5.12%, down 0.26%; pollutant emissions performance greatly reduced compared to last year, carbon 0.09 g/kWh, sulfur dioxide 0.104 g/kWh NOx 0.512 g/kWh; dust removal efficiency of more than 99.8%. -Reliability index: equivalent availability factor in 93.47%, increased 7.95% from a year earlier. Equivalent forced outage rate 0.08%, 0.16% reduction over the same period a year earlier. Major achievements: first, we should adhere to the two management system basis, strengthening technological research, strengthen hidden hazards control and intrinsic safety Enterprise construction took new steps. -The two management system for improvement. Focus on promoting the power of the company management system and the application and implementation of the safety loop five-star management system, improve the safety management system, realize the system of safety control. Further regulate security routines, safety supervision and management network role to play to achieve closed-loop. Strengthening the supervision and management of habitual violation of, strengthening the safety supervision of outsourcing contractors. Carried out in spring and autumn of security inspections, flood control and inspection, safety production month, day supervision of production safety and the Olympic Games and other2014年小学四年级下册数学期末试卷及答案一、谨慎填写（20分）1. 5和30两个数，（ ）是（ ）的倍数，（ ）是（ ）的因数。 24的因数有（ ）。21、2、28、31、57和86这些数可以填入下面的哪些圈里？填一填。 奇数 素数 合数3如右图，一块三角形纸片被撕去了一个角。 这个角是（ ）度，原来这块纸片的形状是（ ）三角形，也是（ ）三角形。 10cm 7cm10cm9cm4在括号里填上“升”或“毫升”。 一瓶椰子汁约有240（ ）。 一个电热水器能盛水60（ ）。5右边梯形的上底与下底长度的和是（ ）厘米，高是（ ）厘米。6在 里填“”或“”，在 里填数。 15612 =（1563）（12 ） =（1563）（12 ）7如图:小红从家出发，经过学校去超市,有( )条路可以选择。 学校 小红家 超市8一张长方形纸，长a厘米，宽b厘米。从这张纸上剪出一个最大的正方形，这个正方形的周长是（ ）厘米，面积是（ ）平方厘米。当a=15, b=10时，原来长方形纸的周长是（ ）厘米，面积是（ ）平方厘米。二、准确判断（4分）（对的在括号内打“”，错的打“”）118500，积的末尾有两个0。 （ ）2梯形不可能是轴对称图形。（ ）3（12K）5605K。 （ ）4一个自然数越大，它的因数个数就越多。（ ）三、慎重选择（4分）（把正确答案的序号填在括号里）3厘米3厘米6厘米4厘米4厘米4厘米3厘米3厘米5厘米 1下面三组小棒，不能围成三角形的是（ ）。 2把1升的水倒入容量为200毫升的纸杯中，可以倒（ ）杯。1 5 2003小猴要给一块地围上篱笆，（ ）的围法更牢固些。 4ab的一个乘数乘10，另一个乘数也乘10，得到的积等于（ ）。 原来的积乘100 原来的积乘20 原来的积乘10四、细心计算（共35分）1 直接写出得数。（8分）12300= 20034= 50110= 8000=60050= 40050= 2630 15040=2 用竖式计算。（9分）28307= 76050= 40030=3 计算下面各题，能简便计算的要用简便方法计算。（18分）60151560 206（39134） 1255446125 （730802）23 400（27080）7 9999992先画出平行四边形底边上的高，再分别量出底和高的长度。1画出下面图形的对称轴。 （能画几条就画几条）五、画画量量（第1、2两题各2分，第3题4分，共8分）底 底（ ）毫米，高（ ）毫米3A 小鱼图从右下方移至左上方，先向（ ）平移（ ）格，再向（ ）平移（ ）格。 把梯形绕A点顺时针方向旋转90，画出旋转后的图形。六、解决问题（每题6分，共24分）沪宁路128km3小时后两车相距多少千米？1每小时73千米每小时87千米 每个茶杯6元,茶壶的价钱是1个茶杯价钱的5倍。买右图这样一套茶具，一共要用多少钱？23中国代表团在亚洲运动会上金牌数已经连续七届高居榜首，下面是中国代表团第715届亚运会获得金牌情况统计图。中国代表团第715届获得金牌情况统计图15012913718394615132 七 八 九 十 十一 十二 十三 十四 十五 单位：块 2007年1月制 200 180 160 140 120 100 80 60 40 20 0 从上图中看出（ ）月份西红柿售价最高，是（ ）元。第十五届多哈亚运会中国代表团的金牌数比第十四届增加了15块。把上面的统计图画完整。（ ）届亚运会中国代表团获得的金牌数最多，（ ）最少。金牌数上升最快的是（ ）届到（ ）届，下降最快的是（ ）届到（ ）届。看了这幅统计图，你有什么想法？ 中国象棋3副平均每副12元围 棋4副平均每副？元4 买中国象棋和围棋一共用去了 96元，平均每副围棋多少元？ 七、探索规律（5分） 先数一数，再填一填，你能发现什么规律？三角形个数123456小棒根数35摆20个这样的三角形，需要多少根小棒？有59根小棒，能摆出多少个这样的三角形？参 考 答 案一、谨慎填写130、5，5、30，1、2、3、4、6、8、12、242奇数：1、31、57 素数：2、31 合数：28、57、86367，锐角，等腰4毫升 升517，963，37684b，b，50，150二、准确判断1 2. . .三、慎重选择1. 2. 3. 4.四、细心计算1.3600,6800,5500,0,30000,8,780,60002.8596,38000,13103.904,2472,1000,30,20000,9900五、画画量量高1 2. 底（ 23或24 ）毫米，高（ 32或33 ）毫米3.上、5，左、7或左、7，上、5 略六、解决问题1480千米 2. 36元 3.略 第十一，第七 第十、第十一，第十一、第十二 略 415元七、探索规律 填表略41根 59个主要介绍的是永磁直流电动机；首先简述了永磁电机、永磁直流电动机从产生到到逐步改善的发展过程，以及以此为基础的未来发展的趋势；activities, comprehensive and tamping Safety Foundation . Troubleshooting, management mechanism, give full play to role of technical supervision and realization of troubleshooting, management, improved process management. This year completed the boiler lower header leakage, boiler pressure, a major risk management, completed 29 of great risks and 3 General problems of governance. Complete chemistry lab construction, thermal control, and complete the boiler scale integrated management, host shafting vibration of 10 scientific and technological projects, such as. Complete supercritical 630MW on-line simulation system development and application of circulating water MCC standby power transformation, the transformation of desulfurization waste water, the unit water supply system of comprehensive treatment and discharge valve modification of coal mill 5 key technological transformation projects, group health is improved. -Science and technology innovation is further increased. Strengthen the characteristics of supercritical unit major issues, gradually clearing the particularity of supercritical unit and regularity. Developed motor oil time management, switch action times, statistics, coal-aided measurement software, improves the production level of lean management. Increased investment in science and technology, reporting science and technology projects and 14 technical project total cost percentage of the total annual production output of 0.25%. Large-scale coal-fired power plant flue gas desulfurization, denitrification complete development and application of key technologies project, won the national science and technology progress second prize. 630MW supercritical units optimized control strategies and the 630MW development and application of on-line simulation system for supercritical units, supercritical 600MW units of turbine driven boiler feed pump set of comprehensive treatment of defects Datang technology respectively one or two and third. Meanwhile, information technology achievements, the company was named China power information technology benchmarking enterprises. -Repair and maintenance has improved further. Modify the inspection standards and standards on a regular