AMC_美国数学竞赛_2000_AMC_10__试题及答案解析

AMC10美国数学竞赛A卷附中文翻译和答案之欧阳学创编

2011AMC10美国数学竞赛A卷时间：2021.03.03 创作：欧阳学 1. A cell phone plan costs $20 each month, plus 5￠per text message sent, plus 10￠ for each minute used over 30 hours. In January Michelle sent 100 text messages and talked for 30.5 hours. How much did she have to pay? (A) $24.00(B) $24.50(C) $25.50(D) $28.00(E) $30.00 2. A small bottle of shampoo can hold 35 milliliters of shampoo, Whereas a large bottle can hold 500 milliliters of shampoo. Jasmine wants to buy the minimum number of small bottles necessary to completely fill a large bottle. How many bottles must she buy? (A) 11(B) 12(C) 13(D) 14(E) 15 3. Suppose [a b] denotes the average of a and b, and {a b c} denotes the average of a, b, and c. What is {{1 1 0} [0 1] 0}? (A)(B)(C)(D)(E) 4. Let X and Y be the following sums of arithmetic sequences: X= 10 + 12 + 14 + …+ 100. Y= 12 + 14 + 16 + …+ 102. What is the value of ?

2011AMC10美国数学竞赛A卷附中文翻译和答案

2011AMC10美国数学竞赛A卷 1. A cell phone plan costs $20 each month, plus 5￠ per text message sent, plus 10￠ for each minute used over 30 hours. In January Michelle sent 100 text messages and talked for 30.5 hours. How much did she have to pay? (A) $24.00 (B) $24.50 (C) $25.50 (D) $28.00 (E) $30.00 2. A small bottle of shampoo can hold 35 milliliters of shampoo, Whereas a large bottle can hold 500 milliliters of shampoo. Jasmine wants to buy the minimum number of small bottles necessary to completely fill a large bottle. How many bottles must she buy? (A) 11 (B) 12 (C) 13 (D) 14 (E) 15 3. Suppose [a b] denotes the average of a and b, and {a b c} denotes the average of a, b, and c. What is {{1 1 0} [0 1] 0}? (A) 2 9(B)5 18 (C)1 3 (D) 7 18 (E) 2 3 4. Let X and Y be the following sums of arithmetic sequences: X= 10 + 12 + 14 + …+ 100. Y= 12 + 14 + 16 + …+ 102. What is the value of Y X ?

美国数学竞赛2016AMCAIME获奖喜报

美国数学竞赛（2016AMC-AIME）获奖喜报在2016年2-3月进行的美国数学竞赛（AMC-AIME）中，我校参赛同学成绩突出，共获得8个特优奖（Distinction Honor Roll，全球前1%）和22个优胜奖（Honor Roll，全球前5%）。获奖名单：班级中文姓名AMC级别评奖评奖(中文)指导老师 E4樊骅12Distinction Honor Roll特优奖(全球前1%)郭卫东DNS1李心宓10Distinction Honor Roll特优奖(全球前1%)伍毅东 E1梁济凡12Distinction Honor Roll特优奖(全球前1%)周映平、刘军凤E8麦子涛12Distinction Honor Roll特优奖(全球前1%)先开萍DNS1翁一平12Distinction Honor Roll特优奖(全球前1%)伍毅东 E3吴溥樾12Distinction Honor Roll特优奖(全球前1%)许作舟 E19旋璇12Distinction Honor Roll特优奖(全球前1%)翁文ENS2周前12Distinction Honor Roll特优奖(全球前1%)梁万峰 E8陈锦河12Honor Roll优胜奖(全球前5%)先开萍 E8李城坚12Honor Roll优胜奖(全球前5%)先开萍 E18方星棉12Honor Roll优胜奖(全球前5%)周若鸿DNS2庞颢然12Honor Roll优胜奖(全球前5%)伍毅东ENS1黄家和12Honor Roll优胜奖(全球前5%)梁万峰FAP黄敬乐12Honor Roll优胜奖(全球前5%) ENS2赵婧彤12Honor Roll优胜奖(全球前5%)梁万峰ENS1陶凯雯12Honor Roll优胜奖(全球前5%)梁万峰DNS1刘子欣10Honor Roll优胜奖(全球前5%)伍毅东 E8劳雅静12Honor Roll优胜奖(全球前5%)先开萍 E8李俊辉12Honor Roll优胜奖(全球前5%)先开萍 E3林郁东12Honor Roll优胜奖(全球前5%)许作舟 E14刘懿德12Honor Roll优胜奖(全球前5%)戴应超ENS2刘煜12Honor Roll优胜奖(全球前5%)梁万峰ENS1栾昊12Honor Roll优胜奖(全球前5%)梁万峰

2018年美国数学竞赛 AMC 试题

2018 AIME I Problems Problem 1 Let be the number of ordered pairs of integers with and such that the polynomial can be factored into the product of two (not necessarily distinct) linear factors with integer coefficients. Find the remainder when is divided by . Problem 2 The number can be written in base as , can be written in base as , and can be written in base as , where . Find the base- representation of . Problem 3 Kathy has red cards and green cards. She shuffles the cards and lays out of the cards in a row in a random order. She will be happy if and only if all the red cards laid out are adjacent and all the green cards laid out are adjacent. For example, card orders RRGGG, GGGGR, or RRRRR will make Kathy happy, but RRRGR will not. The probability that Kathy will be happy is , where and are relatively prime positive integers. Find . Problem 4 In and . Point lies strictly between and on and point lies strictly between and on so that . Then can be expressed in the form , where and are relatively prime positive integers. Find . Problem 5 For each ordered pair of real numbers satisfying there is a real number such that

2019AMC 8(美国数学竞赛)题目

2019 AMC 8 Problems Problem 1 Ike and Mike go into a sandwich shop with a total of to spend. Sandwiches cost each and soft drinks cost each. Ike and Mike plan to buy as many sandwiches as they can and use the remaining money to buy soft drinks. Counting both soft drinks and sandwiches, how many items will they buy? Problem 2 Three identical rectangles are put together to form rectangle , as shown in the figure below. Given that the length of the shorter side of each of the smaller rectangles is feet, what is the area in square feet of rectangle ?

Problem 3 Which of the following is the correct order of the fractions , , and , from least to greatest? Problem 4 Quadrilateral is a rhombus with perimeter meters. The length of diagonal is meters. What is the area in square meters of rhombus ? Problem 5 A tortoise challenges a hare to a race. The hare eagerly agrees and quickly runs ahead, leaving the slow-moving tortoise behind. Confident that he will win, the hare stops to take a nap. Meanwhile, the tortoise walks at a slow steady pace for the entire race. The hare awakes and runs to the finish line, only to find the tortoise already there. Which of the following graphs matches the description of the race, showing the distance traveled by the two animals over time from start to finish?

美国小学数学教育研究报告

更多免费资料请访问：豆丁教育百科美国小学数学教育研究报告深圳市罗湖区翠北小学高红妹摘要：在近百年来世界课程改革的各次浪潮中，美国从来没有做观潮派，而是积极的参与者甚至是主宰者。出现了不少颇有世界影响的课程改革家和课程学论著，值得我们去研究、借鉴。本研究报告介绍了笔者对美国小学数学教育研究的情况。主要包括：研究背景、研究意义、研究方法、研究结果、研究启示、研究反思。关键词：美国小学数学教育研究前言我有幸参加深圳市组织的第三期海外培训，到美国学习、参观和考察。期间我们参观了大学和中小学，听了不同年级的课，参加了各种各样的活动，感受到了极具特色的美国文化风情。一、研究背景人们普遍的看法是：中国的基础教育是打基础的教育，“学多悟少”；而美国的教育是培养创造力的教育，“学少悟多”。中美两国的教育有着极为不同的传统。中国的教育注重对知识的积累和灌输；注重培养学生对知识和权威的尊重；注重对知识的掌握和继承，以及知识体系的构建。相比较，美国则更注重培养学生运用知识的实际能力；注重培养学生对知识和权威的质疑；注重对知识的拓展和创造。这两种教育表达了对待知识的不同态度，中国教育的表达是对知识的静态接受，美国教育则表达的是对知识的动态改变，反映了两国教育不同的知识观。以数学为例，我国教育界历来认为，基本概念和基本运算是数学的基础。尽管教材有计算器的介绍,但老师们总担心学生会依赖计算器,因为考试时学生是不允许带计算器的。然而在美国，基本运算不受重视，计算器在中小学使用很普遍。美国人认为，计算器既然算得又快又准，我们又何必劳神费力地用脑算呢？人脑完全可以省下来去做机器做不了的事。这点我深有体会,记得有一次我们坐公交车时，几个人合起来投币,但司机要我们一个一个投币,我们都觉得奇怪,经过了解，原来他们无法算出几个人一共要付的钱，在我国就决不会出现此等情况。我们教育的“基础”侧重，让学生大脑在独立于计算机的前提下，尽可能多地储

AMC美国数学竞赛AMCB试题及答案解析

2003 AMC 10B 1、Which of the following is the same as 2、Al gets the disease algebritis and must take one green pill and one pink pill each day for two weeks. A green pill costs more than a pink pill, and Al’s pills cost a total of for the two weeks. How much does one green pill cost 3、The sum of 5 consecutive even integers is less than the sum of the rst consecutive odd counting numbers. What is the smallest of the even integers 4、Rose fills each of the rectangular regions of her rectangular flower bed with a different type of flower. The lengths, in feet, of the rectangular regions in her flower bed are as shown in the gure. She plants one flower per square foot in each region. Asters cost 1 each, begonias each, cannas 2 each, dahlias each, and Easter lilies 3 each. What is the least possible cost, in dollars, for her garden 5、Moe uses a mower to cut his rectangular -foot by -foot lawn. The swath he cuts is inches wide, but he overlaps each cut by inches to make sure that no grass is missed. He walks at the rate of feet per

希望杯数学竞赛小学三年级精彩试题

小学三年级数学竞赛训练题（二） 1．观察图1的图形的变化进行填空． 2．观察图2的图形的变化进行填空． 3．图3中，第个图形与其它的图形不同． 4．将图4中A图折起来，它能构成B图中的第个图形． 5．找出下列各数的排列规律，并填上合适的数．（1）1，4，8，13，19，（）．（2）2，3，5，8，13，21，（）．（3）9，16，25，36，49，（）．（4）1，2，3，4，5，8，7，16，9，（）．（5）3，8，15，24，35，（）． 6．寻找图5中规律填数． 7．寻找图6中规律填数． 8．（1）如果“访故”变成“放诂”，那么“1234”就变成．（2）寻找图7中规律填空． 9．用0、1、2、3、4、5、6、7、8、9十个数字组成图8的加法算式，每个数字只用一次，现已写出三个数字，那么这个算式的结果是．

10．图9、图10分别是由汉字组成的算式，不同的汉字代表不同的数字，请你把它们翻译出来． 11．在图11、图12算式的空格内，各填入一个合适的数字，使算式成立． 12．已知两个四位数的差等于8765，那么这两个四位数和的最大值是． 13．中午12点放学的时候，还在下雨．已经连续三天下雨了，大家都盼着晴天，再过36小时会出太阳吗？ 14．某年4月份，有4个星期一、5个星期二，问4月的最后一天是星期几？ 15．张三、李四、王五三位同学中有一个人在别人不在时为集体做好事，事后老师问谁做的好事，张三说是李四，李四说不是他，王五说也不是他．它们三人中只有一个说了真话，那么做好事的是． 16．小李，小王，小赵分别是海员、飞行员、运动员，已知：（1）小李从未坐过船；（2）海员年龄最大；（3）小赵不是年龄最大的，他经常与飞行员散步.则是海员，是飞行员，是运动员． 17．用凑整法计算下面各题：（1）1997+66 （2）678+104 （3）987-598 （4）456-307 18．用简便方法计算下列各题：（1）634+（266-137）（2）2011-（364+611）（3）558-（369-342）（4）2010-（374-990-874） 19．用基准法计算： 108+99+93+102+97+105+103+94+95+104 20．用简便方法计算：899999+89999+8999+899+89 21．求100以内的所有正偶数的和是多少？

2020年度美国数学竞赛AMC12 A卷(带答案)

AMC2020 A Problem 1 Carlos took of a whole pie. Maria took one third of the remainder. What portion of the whole pie was left? Problem 2 The acronym AMC is shown in the rectangular grid below with grid lines spaced unit apart. In units, what is the sum of the lengths of the line segments that form the acronym AMC Problem 3 A driver travels for hours at miles per hour, during which her car gets miles per gallon of gasoline. She is paid per mile, and her only expense is gasoline at per gallon. What is her net rate of pay, in dollars per hour, after this expense?

Problem 4 How many -digit positive integers (that is, integers between and , inclusive) having only even digits are divisible by Problem 5 The integers from to inclusive, can be arranged to form a -by- square in which the sum of the numbers in each row, the sum of the numbers in each column, and the sum of the numbers along each of the main diagonals are all the same. What is the value of this common sum? Problem 6 In the plane figure shown below, of the unit squares have been shaded. What is the least number of additional unit squares that must be shaded so that the resulting figure has two lines of symmetry

美国数学竞赛AMC题目及答案

2. is the value of friends ate at a restaurant and agreed to share the bill equally. Because Judi forgot her money, each of her seven friends paid an extra $ to cover her portion of the total bill. What was the total bill is in the grade and weighs 106 pounds. His quadruplet sisters are tiny babies and weigh 5, 5, 6, and 8 pounds. Which is greater, the average (mean) weight of these five children or the median weight, and by how many pounds number in each box below is the product of the numbers in the two boxes that touch it in the row above. For example, . What is the missing number in the top row

and his mom stopped at a railroad crossing to let a train pass. As the train began to pass, Trey counted 6 cars in the first 10 seconds. It took the train 2 minutes and 45 seconds to clear the crossing at a constant speed. Which of the following was the most likely number of cars in the train fair coin is tossed 3 times. What is the probability of at least two consecutive heads Incredible Hulk can double the distance he jumps with each succeeding jump. If his first jump is 1 meter, the second jump is 2 meters, the third jump is 4 meters, and so on, then on which jump will he first be able to jump more than 1 kilometer is the ratio of the least common multiple of 180 and 594 to the greatest common factor of 180 and 594 11. Ted's grandfather used his treadmill on 3 days this week. He went 2 miles each day. On Monday he jogged at a speed of 5 miles per hour. He walked at the rate of 3 miles per hour on Wednesday and at 4 miles per hour on Friday. If Grandfather had always walked at 4 miles per hour, he would have spent less time on the treadmill. How many minutes less 12. At the 2013 Winnebago County Fair a vendor is offering a "fair special" on sandals. If you buy one pair of sandals at the regular price of $50, you get a second pair at a 40% discount, and a third pair at half the regular price. Javier took advantage of the "fair special" to buy three pairs of sandals. What percentage of the $150 regular price did he save

中国一年级数学题难哭美国小学生

中国一年级数学题难哭美国小学生提要：这是一道〝大白〞题，小学一年级的。在美国读完了三年级的儿子面对这道题的反响，才更是大白，直接把我笑趴下了。笑够了再剖析，原来中美教育的差距到了这个年龄段，曾经深深地刻在孩子的思想形式里了。暑假里一个懒懒的下午，手机里收到国际的热心妈妈发来的中国一年级的数学题，我念了一题给儿子听，然后多少帮着他一点，做出来了，很绕脑子。后来又看到这样一题，我又念给儿子听了，通知他还是一年级的标题：〝大白+大白=白胖胖，求大、白、胖区分是哪3个数字〞多年在美国的学习和生活，曾经使得我关于脑筋弯弯绕或是急转弯的东西十分反感，所以我自己看到这样的题，是刻意地封锁了大脑，不去想它，由衷地没兴味。儿子在学校数学效果很好，自决计也不错，让他试试倒是无妨。不是说看出了中美教育的差异吗，第一波来了。我相对没有想到儿子会出现这样的反响，我估量读者中谁也不会想到。他说，这不是一年级的标题。他怎样会知道？他说，不能说他人胖，那是言语欺凌，一定不是学校的标题。原来他的直觉在这里！确实，假设我们细心品味一下美国的少儿影视或书籍，十分清楚，话题和言语都是精心过滤的，十分留意对儿童的维护。不过呢，我自己在心里嘀咕，如此〝大白〞的孩子，怕是以后只能在美国社会讨生活了。

我仔细地跟他解释了，这确实是一道中国的标题，中国学校的言语运用，没有美国控制得这么严，而且胖在中文里也没有不好的意思(这一点他知道，但就是一直以为有不好的意思存在)。这一次，他说他知道处置方案了。把我笑趴下的回答来了。是真趴下了，半天缓不过去。他的答案是：〝你、我，嗯……还有一个一年级的〞。好了，俩大白，他自己一个，老爸一个，那个白胖胖怎样办呢，硬凑出一个〝一年级的〞来。看来他和老爸是都属于又胖又白的类型了。这里有个小背景，我们父子俩事先都不知道〝大白〞是个卡通角色，所以他往又大又白的方面去想，很自然。可是不行呀，9岁的孩子了，这样笑，会打击他的自决计的。好不容易止住了笑，想给他解释一下，大、白、胖这里各代表一个数字，我这才发现，这个小小的等式里，居然3个数字都是未知数，如此笼统的概念，儿子处置不了。我决议等会空上去，拿纸笔写上去，再来对付。之后的时间是游泳洗澡换衣服，然后得预备晚饭，我一时就把这个话题忘了。儿子突然跳出来一句，我知道了，答案是7。他是属于那种死钻牛角尖、绝不坚持的性情，估量不时在想这个效果。可是〝答案是7〞这样的回答，显然还是没有弄懂这里有3个未知数这个概念。我问他为什么，他指着我的电脑屏幕说，就在这里，我就知道是个一年级的！原来，我的电脑上显示了我任务室QQ群里一位妈妈分享的

美国数学竞赛amc12

2002 AMC 12A Problems Problem 1 Compute the sum of all the roots of Problem 2 Cindy was asked by her teacher to subtract 3 from a certain number and then divide the result by 9. Instead, she subtracted 9 and then divided the result by 3, giving an answer of 43. What would her answer have been had she worked the problem correctly? Problem 3 According to the standard convention for exponentiation, If the order in which the exponentiations are performed is changed, how many other values are possible? Problem 4 Find the degree measure of an angle whose complement is 25% of its supplement. Problem 5

Each of the small circles in the figure has radius one. The innermost circle is tangent to the six circles that surround it, and each of those circles is tangent to the large circle and to its small-circle neighbors. Find the area of the shaded region. Problem 6 For how many positive integers does there exist at least one positive integer n such that ? infinitely many Problem 7 A arc of circle A is equal in length to a arc of circle B. What is the ratio of circle A's area and circle B's area? Problem 8 Betsy designed a flag using blue triangles, small white squares, and a red center square, as shown. Let be the total area of the blue triangles, the total area of the white squares, and the area of the red square. Which of the following is correct?

AMC 美国数学竞赛 2001 AMC 10 试题及答案解析

USA AMC 10 2001 1 The median of the list is . What is the mean? 2 A number is more than the product of its reciprocal and its additive inverse. In which interval does the number lie? 3 The sum of two numbers is . Suppose 3 is added to each number and then each of the resulting numbers is doubled. What is the sum of the final two numbers? 4 What is the maximum number of possible points of intersection of a circle and a triangle? 5 How many of the twelve pentominoes pictured below have at least one line of symettry?

6 Let and denote the product and the sum, respectively, of the digits of the integer . For example, and . Suppose is a two-digit number such that . What is the units digit of ? 7 When the decimal point of a certain positive decimal number is moved four places to the right, the new number is four times the reciprocal of the original number. What is the original number? 8 Wanda, Darren, Beatrice, and Chi are tutors in the school math lab. Their schedule is as follows: Darren works every third school day, Wanda works every fourth school day, Beatrice works every sixth school day, and Chi works every seventh school day. Today they are all working in the math lab. In how many school days from today will

中美小学数学教材的五大不同美国数学还要会说

网易教育讯（来源：微信公众号“少年商学院”）当我的女儿读小学的时候，面对女儿的教育和数学学习问题，我重新学习起了数学。当初我不知道数学学习路在何方，但是出于一种直觉，数学学习不应该是这种大习题量的这种铁杵磨成针式训练，而更应该着重思维训练。有一天，我想：美国人的数学教材是什么样子的呢？拜互联网所赐，我很快就在网上找到了美国加州小学三年级数学教材。不看不知道，一看吓一跳。可以说，美国加州小学数学教材和中国当下的小学数学教材对比，真的是云泥之别。下面，就从这二者的比较来聊聊美国小学数学教材的特色： ▋数学不仅要会算，还要会说首先，我们来看看中国人教版三年级数学教材有关四边形这个章节的编写：（上图为中国人教版三年级数学教材）这几张图片几乎看不出没有什么结构性，反观美国加州数学三年级教材，却有明确的模块。从概念（Main Idea and New vocabulary）到预备知识（Get Ready to Learn），让学生先明确基础知识，然后联系到现实世界中的实例（Real-World EXAMPLE）从实际生活中引入，这样孩子学习起来，对于概念不存在陌生感。

这其中最大的亮点是“Talk about”，说出你对知识的理解。在美国，数学教育和其它所有学科教育一样，都包括言语表述能力的训练。这对促进孩子智性发展有很大作用。这个环节，就是帮助孩子理清所学的概念，并检查其了解的程度和运用概念解决问题的能力。（数学课本里经常有“tell”的任务） ▋每个章节都涉及系列的概念教育从人教版三年级数学教材，勉勉强强只能找到“周长”、“面积”和“小数点”这三个概念的定义。如下图所示：

美国数学竞赛amc的常用数学英语单词

美国数学竞赛amc8的常用数学英语单词数学 mathematics, maths（BrE）, math（AmE）被除数 dividend 除数 divisor 商 quotient 等于 equals, is equal to, is equivalent to 大于 is greater than 小于 is lesser than 大于等于 is equal or greater than 小于等于 is equal or lesser than 运算符 operator 数字 digit 数 number 自然数 natural number 公理 axiom 定理 theorem 计算 calculation 运算 operation 证明 prove 假设 hypothesis, hypotheses（pl.）命题 proposition 算术 arithmetic 加 plus（prep.）, add（v.）, addition（n.）

被加数 augend, summand 加数 addend 和 sum 减 minus（prep.）, subtract（v.）, subtraction（n.）被减数 minuend 减数 subtrahend 差 remainder 乘 times（prep.）, multiply（v.）, multiplication（n.）被乘数 multiplicand, faciend 乘数 multiplicator 积 product 除 divided by（prep.）, divide（v.）, division（n.）整数 integer 小数 decimal 小数点 decimal point 分数 fraction 分子 numerator 分母 denominator 比 ratio 正 positive

AMC12美国数学竞赛 2012-2014

AMC12 2014A Problem 1 What is Solution At the theater children get in for half price. The price for adult tickets and child tickets is . How much would adult tickets and child tickets cost? Solution Walking down Jane Street, Ralph passed four houses in a row, each painted a different color. He passed the orange house before the red house, and he passed the blue house before the yellow house. The blue house was not next to the yellow house. How many orderings of the colored houses are possible? Solution Suppose that cows give gallons of milk in days. At this rate, how many gallons of milk will cows give in days? Solution

On an algebra quiz, of the students scored points, scored points, scored points, and the rest scored points. What is the difference between the mean and median score of the students' scores on this quiz? Solution The difference between a two-digit number and the number obtained by reversing its digits is times the sum of the digits of either number. What is the sum of the two digit number and its reverse? Solution The first three terms of a geometric progression are , , and . What is the fourth term? Solution A customer who intends to purchase an appliance has three coupons, only one of which may be used: Coupon 1: off the listed price if the listed price is at least Coupon 2: dollars off the listed price if the listed price is at least Coupon 3: off the amount by which the listed price exceeds For which of the following listed prices will coupon offer a greater price reduction than either coupon or coupon ?