英语数学练习题
小升初英语类数学题汇总及答案完整版

小升初英语类数学题汇总及答案HEN system office room 【HEN16H-HENS2AHENS8Q8-HENH1688】小升初英语类数学题专项练习(一)1、An ant(蚂蚁) covers a distance of 90 metres in 3 hours. The average speed of the ant in decimetres(分米) per minute is____.3、In a certain town some people were affected by a ’flu’ epidemic(流感). In the first month 20% of the population contracted the flu whilst 80% were healthy.4、In the following month 20% of the sick people recovered and 20% of the healthy people contracted the disease.5、What fraction(分数) of the population is healthy at the end of the second month6、7、4、Mpho, Barry, Sipho, Erica and Fatima are sitting on a park bench(公园长椅).Mpho is not sitting on the far right. Barry is not sitting on the far left.Sipho is not sitting at either end(两头). Erica is sitting to theright of Barry,but not necessarily next to him. Fatima is not sitting next to Sipho. Sipho is not sitting next to Barry.Who is sitting at the far right5、Of the 28 T–shirts in a drawer(抽屉), six are red, five are blue, and the rest are white. If Bob selects T–shirts at random whilst packing for a holiday, what is the least number he must remove from the drawer to be sure that he has three T–shirts of the same colour6、In an alien language(外语), jalez borg farn means “good maths skills”. Nurf klar borg means “maths in harmony” and darko klar farn means “good in gold”.7、What is “harmony gold” in this language8、9、10、Five children, Amelia, Bongani, Charles, Devine and Edwina, were in the11、classroom when one of them broke a window. The teacher asked each of them to make a statement(陈述) about the event, knowing that three of them always lie and two always tell the truth. Their statements were as follows:12、Amelia: “Charles did not break it, nor did Devine.”13、Bongani: “I didn’t break it, nor did Devine.”14、Charles: “I didn’t break it, but Edwina did.”15、Devine: “Amelia or Edwina broke it.”16、Edwina: “Charles broke it.”17、Who broke the window18、19、20、Did you know A palindrome(回文数) is a number which reads the same forwards as backwards . 35453. The year 2002 is an example of a palindromic number. What is the difference between 2002 and the number of the previous palindromic year21、9、If a b = a+3×b then the value of 2+2 (3 5) is____.10、Two ants start at point A and walk at the same pace. One ant walks around a 3 cm by 3 cm square whilst the other walks around a 6 cm by 3cmrectangle. What is the minimum distance, in centimetres, any onemustcover before they meet again?小升初英语类数学题专项练习(二)1、Did you know In the decimal number system (base 10) ten different digits, 0 to 9, are used to write all the numbers. In the binary number system (base 2) two different digits are used, . 0 and 1.Which one of the following numbers is not a valid number in the octal number system (base 8)A) 128 B) 127 C) 126 D) 125 E) 1242、The number of diagonals that can be drawn in a regular polygon withtwenty sides (icosagon) is_____.翻译:正20边形的对角线有几条?4、Two numbers are in the ratio 2 : 3. When 4 is added to each number the ratio changes to 5 : sum(和) of the two original numbers is____.5、The greatest number of Mondays which can occur in 45 consecutivedays is____翻译:连续45天内,最多有几个星期一?6、Saul plays a video game in which he scores 4 for a hit and lost 6 fora miss. After 20 rounds his score is 30. The number of times he has missed is____.7、Three girls A, B and C run in a 100 m race. When A finishes, B is 10 mbehind A and when B finishes C is 20 m behind B. How far in metres wasC from A when A finished(Let’s assume all the athletes run at aconstant speed)8、The areas of the faces of a rectangular box(长方体盒子) are 84 cm2 , 70 cm2and 30 volume of the box in cm3 is____.9、You have 3 weights(砝码): 1 kg, 3 kg and 9 kg as well as an equal arm balance(天平). How many different weight objects can you weighwith these three?10、[Remember the weights may be placed on either side]11、小升初英语类数学题专项练习(三)1.Two numbers differ by 57. Their sum is 185. Find the numbers. Choices for the smaller number:54 64 74.bus went 318 km farther than a car. The car went one third as faras the bus. How far did each vehicle(车辆) travelChoices for the smaller number: 147 151 159number is four times another number. The larger number is also 87 more than the smaller number. Find the numbers. Choices for the smaller number: 29 30 334.A clown(小丑) weights 60 lb(磅) more than a trapeze artist(空中飞人). The trapeze artist weighs two thids as much as the clown. How much does each weigh5.choices for the weight of the trapeze artist : 110 120 1256.5. The . Senate(参议院) has 100 members, all Democrats(民主党人)or Republicans(共和党人). Recently there were 12 more Democrats than Republicans. How many Senators from each political party were there at that timeChoices for the number of Republicans: 38 42 44ninth grade class has 17 more girls than boys. there are 431 students in all. how many boys are there how many girls are there Choices for the number of boys: 191 202 2077. Elena has one and a half times as much money as they have 225. how much money does each haveChoices for Ramom's amount;80 90 958.Western state college is 18 years older than southern state. western is also 2 and the half times as old as southern. how old is each Choice for southern state's age:12 14 18【2015年洛阳二外小升初真题】1. When my dad celebrated his 31st birthday, I was 8 years old. Now my dad is twice the age of I am. What’s my age now?2. A bottle of juice sells at the price of 1 Yuan. The juice is worth Yuan more than the bottle is. How much does an empty bottle cost?3. Can you add the operations to the formula to make it correct?8 __ 4 __ 2 __ 9 = 254. Please put the following numbers into the circles so that you get 40 when you add all the numbers on each side of the triangle6, 18, 6, 9, 8, 7, 19, 4, 215. Mr. and Mrs. Bing has 7 daughters, each daughter has a brother. How many sons do Mr. and Mrs. Bing have?6. What’s the next number?4, 6, 10, 18, 34, _____【2013年洛阳二外小升初真题】1.There are some chickens and rabbits in a cage(笼子).You can see 9 heads at the top and 24 feet at the bottom. How many chickens andrabbits are there in the cage?(6分)students were in a math contest(竞赛).The average(平均数) of their final score(分数) is average of the boy’s score is average of the girl’s score is many of them are boys How many of them are girls (8分)and Jim are friends. The ratio(比)of Jack’s and Jim’s pocket money is 3: Jack gives Jim 10 yuan, the ratio of their pocket money will become 5: how much money does Jack have?(8分)4.Mike has a lot of apples. He needs to get them to town and sell them. It takes(花费)3 days to get all the apples to town with 8 big trucks. It takes 8days to get 75% of the apples to town with 5 small trucks. NowMike has 3 big trucks and 4 small trucks, how many days will it take to get all the apples to town?(8分)小升初英语类数学题专项练习(一)参考答案1、单位换算 90×10÷(3×60)=52、46173、254、Erica5、抽屉原则 76、注意一一对应,borg= maths, farn=good, jalez=skills. Klar=in,Nurf=harmony, darko=gold. 答案是Nurf darko.7、Charles8、2002-1991=119、5810、 36小升初英语类数学题专项练习(二)参考答案1、A 考察我们学过的简单的进制问题,显然8进制中没有8出现2、170 找规律,公式为n×(n-3)÷23、3 就是求379减去6的平方的差的各位数。
数学英语练习题小学

数学英语练习题小学1. Addition (加法)a) Solve the following addition problems: (解决下面的加法问题)i) 2 + 4 = ____ii) 8 + 3 = ____iii) 5 + 7 = ____b) Fill in the missing numbers in the addition sentences: (填写加法算式中的缺失数字)i) 9 + ____ = 14ii) ____ + 6 = 11iii) 4 + ____ = 92. Subtraction (减法)a) Solve the following subtraction problems: (解决下面的减法问题)i) 10 - 3 = ____ii) 8 - 2 = ____iii) 12 - 6 = ____b) Fill in the missing numbers in the subtraction sentences: (填写减法算式中的缺失数字)i) 15 - ____ = 9iii) 11 - ____ = 33. Multiplication (乘法)a) Solve the following multiplication problems: (解决下面的乘法问题)i) 3 x 4 = ____ii) 6 x 2 = ____iii) 5 x 9 = ____b) Fill in the missing numbers in the multiplication sentences: (填写乘法算式中的缺失数字)i) 7 x ____ = 28ii) ____ x 3 = 15iii) 9 x ____ = 634. Division (除法)a) Solve the following division problems: (解决下面的除法问题)i) 8 ÷ 2 = ____ii) 12 ÷ 4 = ____iii) 15 ÷ 3 = ____b) Fill in the missing numbers in the division sentences: (填写除法算式中的缺失数字)ii) ____ ÷ 5 = 10iii) 36 ÷ ____ = 45. Word Problems (应用题)a) Peter has 8 apples. He gives 3 apples to his sister. How many apples does Peter have now? (彼得有8个苹果。
英语数学习题(中英文

英语数学题班级: 姓名:1、今天是星期四,101000天后是星期几?Today is Thursday, what day is 101000 days later?2、某班男女人数相等,喜欢足球的学生中51是女生,喜欢足球的男生占全班人数的41。
已知不喜欢足球的女生有21人,喜欢足球的男生有( )人。
3 ).4139, the 5、A 、B A 与Dsecond place, then B got ( ).6、将1999减去它的21,再减去余下的31,再减去余下的41,……,最后减去余下的19991,那么剩下的数是( )。
Subtract one half of 1999 from it, and then subtract one third of the rest, and then subtract one quarter of the remaining,...... , finally subtract one 1999th of the remaining , then the result is ().7、现有大小油桶40个,每个大油桶可装油5千克,每个小油桶可装油3千克,大桶比小桶共多装油24千克,那么大油桶有()个,小油桶有()个。
There are forty drums, each big drums can hold oil 5 kg, each small oil can hold 3 kg, big drums hold more than 24 kg than small drums, so big drums have ( ), small oil have ( ). 8、甲、乙、丙三人同时同向出发,沿着周长为900米的环行跑道跑步。
甲每分钟跑360米,乙每分钟跑300米,丙每分钟跑210米。
他们至少各绕甲()圈,乙()圈,丙()) ring.9、将1011、2倍,小students without glasses is 2 times of the number with glasses, Bob found the number of the students with glasses is two thirds of the number without glasses. ( ) students attend theget-together.12、某商品按定价卖出可得利润960元,若按定价的80%卖出,则亏损832元,则商品的购入价是()元。
小学一年级数学英语练习题

小学一年级数学英语练习题1. Look at the picture and answer the questions.(观察图片并回答问题。
)a) How many ducks are there?(有多少只鸭子?)There are ________ ducks.b) How many apples are there?(有多少个苹果?)There are ________ apples.c) How many cats are there?(有多少只猫?)There are ________ cats.2. Solve the following addition problems.(解决以下加法问题。
)a) 3 + 2 = ________b) 5 + 4 = ________c) 2 + 1 = ________3. Solve the following subtraction problems.(解决以下减法问题。
)a) 6 - 3 = ________b) 9 - 4 = ________c) 7 - 2 = ________4. Circle the number that comes next.(圈出下一个数。
)a) 2, 4, 6, 8, ________b) 1, 3, 5, 7, ________c) 10, 20, 30, 40, ________5. Complete the pattern by filling in the missing numbers.(通过填写缺失的数字来完成模式。
)a) 1, 3, 5, ________, 9, 11b) 2, 4, 6, ________, 10, 12c) 5, 10, 15, ________, 25, 306. Write the number word for the given numbers.(用英文单词写出给定数字。
小学英语数学练习题答案

小学英语数学练习题答案【篇一】英语数学练习题答案(Answer Key)一、选择题1. C2. A3. B4. B5. C6. A7. B8. C9. A 10. B二、填空题1. 402. September3. twelve4. 755. eight6. 4:307. 7:208. 1/49. 21 10. 72三、判断题1. T2. F3. F4. T5. T四、解答题1. 42解析:题目给出了一个数列:2, 5, 8, 11, ...。
可以发现,每个数都比前一个数增加了3。
所以,下一个数应该是11+3=14。
2. 35解析:题目给出了一个数列:2, 5, 11, 20, ...。
可以发现,每个数都比前一个数增加了3、6、9、...,即递增的差值是3的倍数,而3的倍数依次是3、6、9、12、15、...,所以下一个数应该是20+15=35。
3. 6解析:根据题目,C只比D少1个多边形,而每个多边形都是由三条直线组成的,所以C少了3个直线,即C只有9条直线,而E则比D多2个多边形,所以E比D多了6条直线。
所以,答案是6条直线。
【篇二】小学英语数学练习题答案(Answer Key)一、选择题1. C2. B3. A4. B5. C6. B7. A8. A9. C 10. B二、填空题1. 452. February3. six4. 845. nine6. 3:157. 6:308. 3/49. 18 10. 80三、判断题1. F2. T3. F4. T5. T四、解答题1. 27解析:根据题目,16个苹果分成三等份,每份的苹果数量相等。
所以,每份苹果的数量应该是16÷3=5(取整)。
而2个苹果无法平均分配,所以应该放在一起。
那么,一等份有5个苹果,二等份有5个苹果,三等份为2个苹果。
即总共有5+5+2=12个苹果。
那么,剩下的4个苹果则需要被加上,所以答案是12+4=16个苹果。
2. 38解析:根据题目提供的信息,10米绳子上红色的部分长2.5米,那么剩下的蓝色部分就是10-2.5=7.5米。
四年级英语数学问题解决单选题30题

四年级英语数学问题解决单选题30题1.There are 8 apples in a basket. Tom puts 3 more apples in the basket. How many apples are there in the basket now?A.10B.11C.12D.13答案:B。
本题考查加法运算。
篮子里原来有8 个苹果,Tom 又放了3 个,那么现在篮子里苹果的总数是8+3=11 个。
选项A,10 个是错误的;选项C,12 个是错误的;选项D,13 个是错误的。
2.Lily has 15 pencils. She gives 7 pencils to her friend. How many pencils does Lily have now?A.6B.7C.8D.9答案:C。
本题考查减法运算。
Lily 原来有15 支铅笔,给了朋友7 支,那么她现在还剩下15-7=8 支铅笔。
选项A,6 个是错误的;选项B,7 个是错误的;选项D,9 个是错误的。
3.There are 20 students in a class. 12 students are boys. How many students are girls?A.6B.7C.8D.9答案:C。
本题考查减法运算。
班级里总共有20 个学生,12 个是男生,那么女生的人数是20-12=8 个。
选项A,6 个是错误的;选项B,7 个是错误的;选项D,9 个是错误的。
4.Jack has 18 candies. He eats 5 candies. How many candies does he have left?A.11B.12C.13D.14答案:C。
本题考查减法运算。
Jack 原来有18 颗糖,吃了5 颗,那么他还剩下18-5=13 颗糖。
选项A,11 个是错误的;选项B,12 个是错误的;选项D,14 个是错误的。
六年级数学上册英语练习题

六年级数学上册英语练习题一、单项选择题1. What is the simplified form of 9/27?A. 1/9B. 1/3C. 3/9D. 9/272. Which of the following fractions is equivalent to 4/8?A. 1/2B. 2/4C. 3/6D. 5/83. Tina has 20 apples. She eats 1/4 of them. How many apples does she have left?A. 5B. 10C. 15D. 164. What is the place value of 4 in the number 5,432,019?A. ThousandsB. Hundred thousandsC. Ten thousandsD. Millions5. A rectangle has a length of 10 cm and a width of 5 cm. What is its area?A. 25 sq cmB. 30 sq cmC. 45 sq cmD. 50 sq cm6. Which of the following is a prime number?A. 10B. 15C. 23D. 30二、填空题1. 3/5 + 1/5 = ______2. 9 - 3 × 2 + 4 = ______3. 7 × 8 ÷ 2 - 3 = ______4. 1/4 ÷ 1/2 = ______5. 7 × (4 + 2) = ______6. 15 - (4 × 2) = ______三、解答题1. Calculate the perimeter of a rectangle with a length of 8 cm and a width of 4 cm.2. Simplify the expression: 12 + 3 × 4 ÷ 6 - 2.3. Find the missing number in the pattern: 4, 8, ____, 16, 20.4. John has 3/4 of a pizza, and he wants to share it equally with his 5 friends. How much pizza will each friend get?5. Make a triangle with sides of length 5 cm, 7 cm, and 9 cm. Is this a right triangle? Explain your answer.四、应用题1. Sally has 15 marbles. She gives 2/3 of them to her friend. How many marbles does Sally have left?2. The ratio of boys to girls in a class is 3:5. If there are 24 boys, how many girls are there?3. A shop sells pencils at a price of $0.50 each. If Molly buys 6 pencils, how much does she pay in total?4. Lisa has a rectangular garden with a length of 8 meters and a width of5 meters. If she wants to plant flowers in half of the garden, how many square meters of flowers will she have?5. Jamie wants to buy a toy that costs $25. He has saved $15. How much more money does he need to buy the toy?答案:一、单项选择题1. B2. A3. C4. C5. D6. C二、填空题1. 4/52. 113. 254. 1/25. 426. 7三、解答题1. The perimeter of the rectangle is 24 cm.Perimeter = 2*(length + width) = 2*(8 + 4) = 2*12 = 24 cm2. Simplified expression: 12 + 3 × 4 ÷ 6 - 2 = 12 + 12 ÷ 6 - 2 = 12 + 2 - 2 = 123. The missing number in the pattern is 12.The pattern is increasing by 4 each time: 4, 8, 12, 16, 20.4. Each friend will get 3/20 of the pizza.Amount per friend = (3/4) ÷ 5 = 3/4 * 1/5 = 3/205. No, this is not a right triangle.According to the Pythagorean theorem, a^2 + b^2 = c^2, where a and b are the lengths of the two shorter sides, and c is the length of the hypotenuse. In this case, 5^2 + 7^2 is not equal to 9^2, so it is not a right triangle.四、应用题1. Sally has 5 marbles left.Remaining marbles = 15 - 2/3 * 15 = 15 - 10 = 52. There are 40 girls in the class.Boys:Girls = 3:5, so the ratio of boys to girls is 3/5.If there are 24 boys, then the number of girls can be calculated as:Girls = (5/3) * 24 = 403. Molly pays $3.00 in total for 6 pencils.Total cost = Price per pencil * Number of pencils = $0.50 * 6 = $3.004. Lisa will have 20 square meters of flowers.Area of the garden = length * width = 8 * 5 = 40 square metersLisa wants to plant flowers in half of the garden, so the area will be:Area of flowers = 1/2 * 40 = 20 square meters5. Jamie needs $10 more to buy the toy.Additional money needed = Cost of the toy - Amount saved = $25 - $15 = $10注意:由于字数限制,此处只给出题目和答案的核心内容,题目中的说明和计算步骤可能会因字数限制而省略。
数学英语练习题

数学英语练习题### 数学英语练习题#### 数学部分一、选择题1. What is the value of \( 2^3 \) ?- A. 4- B. 6- C. 8- D. 102. If the perimeter of a square is 20 units, what is the length of one side?- A. 5 units- B. 4 units- C. 3 units- D. 2 units3. Solve for \( x \) in the equation \( 3x - 7 = 8 \) . - A. 3- B. 5- C. 7- D. 9二、填空题1. The sum of the first \( n \) natural numbers is given by the formula \( \frac{n(n+1)}{2} \). If \( n = 10 \), the sum is ______.2. The area of a rectangle is calculated by multiplying its length by its width. If the area is 48 square meters and the width is 8 meters, the length is ______ meters.3. If a right triangle has legs of 3 and 4 units, the hypotenuse is \( \sqrt{3^2 + 4^2} \), which equals ______ units.三、解答题1. A store has a sale where all items are 20% off. If a jacket originally costs $100, what is the sale price?2. A train travels at a constant speed of 60 miles per hour. How long will it take to travel 180 miles?3. A company has 120 employees. If the company decides to increase the workforce by 25%, how many new employees will be hired?#### 英语部分一、选择题1. Which word is a synonym for "diligent"?- A. Careless- B. Lazy- C. Hardworking- D. Idle2. The phrase "break the ice" is used to describe what?- A. Shattering a frozen lake- B. Starting a conversation- C. Cooling a room- D. Freezing a beverage3. The word "altruistic" is most closely related to which of the following?- A. Selfish- B. Generous- C. Greedy- D. Stingy二、填空题1. The word "____" can be used to describe someone who is always ready to help others.- (Hint: Begins with 'w')2. The past tense of "begin" is ______.3. The phrase "____" is used to express that something is very easy.- (Hint: Contains the word 'piece')三、作文题Write a short essay about the importance of learning a secondlanguage. Your essay should include:- The benefits of being bilingual.- How learning a new language can broaden one's perspective. - Your personal experience or opinion on language learning.Please attempt the above questions to test your understanding of mathematical concepts and English language skills. Remember, practice makes perfect!。
- 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。
【题目1】有甲乙丙三车各以一定的速度从A到B,乙比丙晚出发10分钟,出发后40分钟追上丙,甲比乙又晚出发10分钟,出发后60分钟追上丙,问,甲出发后多少分钟可以追上乙?
【解答】乙丙的速度比是(10+40):40=5:4,甲丙的速度比是(20+60):60=4:3。
所以甲乙的速度比是4/3:5/4=16:15,甲比乙晚出发10分钟,可以得出甲用了15×10=150分钟追上乙。
【题目2】正方形ABCD是一条环形公路,已知汽车在AB上的时速为90千米,在BC上的时速是120千米,在CD上的时速是60千米,在DA上的时速是80千米。
已知从CD上的一点P同时反向各发一辆汽车,他们将在A、B的中点上相遇。
那么如果从PC中点M点同时反向各发一辆汽车,他们将在A、B上的一点N相遇。
求AN占AB的几分之几?
【解答】设每边720千米,AB、BC、CD和DA分别需要8,6,12,9小时,D →P需要(12-9+6)÷2=4.5小时,P→D→A需要13.5小时,这时相距8+6-13.5=0.5小时的路程,A→N就需要0.5÷2=1/4小时,所以AN:AB=1/4÷8=1/32
【题目3】甲乙二人在400米的跑道上进行两次竞赛,第乙先跑到25米后,甲开始追乙,到终点比乙提前7.5秒,第二次乙先跑18秒后,甲追乙,当乙到终点时,甲距终点40米,求在400米内,甲乙速度各多少?
【解答】第甲行全程的时间乙行了全程的1-25÷400=15/16少7.5秒。
第二次甲行全程的1-40÷400=9/10的时间乙就行了全程的15/16×9/10=27/32少7.5×9/10=27/4秒。
乙行完全程需要(18-27/4)÷(1-27/32)=72秒。
乙每秒行400÷72=50/9米。
甲每秒行(400-40)÷(72-18)=20/3米
【题目4】甲乙两人分别从AB两地同时出发,在AB之间往返跑步,甲每秒跑3米,乙每秒跑7米。
如果他们第四次相遇点与第五次相遇点的距离是150米,那么AB之间的距离是多少米?
【解答】迎面相遇两人单程和依次是1,3,5,7,9,……。
追上相遇的单程和依次是(3+7)÷(7-3)=2.5,2.5×3=7.5,……,所以相遇的单程和是1,2.5,3,5,7,7.5,9,……,因此第四次和第五次相遇是迎面相遇。
相遇点的距离占单程的(2-3/10×5)-(3/10×7-2)=2/5,因此得出AB的距离是150÷2/5=375米。
【题目5】甲乙两辆车在一条长为10千米的环形公路上从同一地点同时反向开出,甲车开出4千米时两车相遇。
如果每次相遇后两车都提速10%,求第三次相遇时甲车离出发点多远。
【解答】每次提速之后的速度比也不会发生变化。
每次相遇甲行4千米,第三次相遇甲行了4×3=12,和出发点相距12-10=2千米。
【题目6】甲、乙两人同时从山脚开始爬山,到达山顶后就立即下山,他们下山的速度是各自上山速度的2倍。
甲到达山顶时乙距山顶还有400米;甲回到山脚时,乙刚好下到半山腰。
求山脚到山顶的距离。
【解答】甲乙的速度比是(1+1×2):(1×2+0.5)=6:5,山脚到山顶400×6=2400米。
【题目7】甲乙两车同时从A、B两地出发相向而行,两车中途相遇后,甲又用4小时到B地,乙又用9小时到A地,相遇时,甲车比乙车多行了90千米,求甲乙两车每小时各行多少千米?
【解答】根据行同一段时间的比4:相遇时间=相遇时间:9,得到相遇时间是6小时,可以知道甲乙的速度比是6:4=3:2,那么相遇时甲乙行的路程比也是3:2,即相遇时甲行了90×3=270千米,乙行了90×2=180千米。