Math topic中文
Translation real world
translation of simple real-world situations into algebraic expressions
Practice questions
- 1Mrs Ang runs a small tuition centre for secondary school students. The tables provide information on the cost of running…
- 2张老板经营两种茶叶:第一种为“采花芽尖”,卖出千克总售价为元;第二种茶叶为“云顶雾绿”,比第一种茶叶多卖千克时,总售价比第一种多元。请你帮张老板计算一下,哪一种茶叶单价稍贵些? 其中…
- 3一艘轮船在静水中的速度为千米小时,水流的速度为千米小时,轮船顺水航行小时的航程与逆水航行小时的航程相差 ___ 千米用含的式子表示
- 4Adam has some 50-cent and 20-cent coins in his wallet. Given that he has a total of 73 coins adding up to a value of $2…
- 5家电下乡是我国应对当前国际金融危机,惠农强农,带动工业生产,促进消费,拉动内需的一项重要举措.国家规定,农民购买家电下乡产品将得到销售价格13%的补贴资金.今年5月1日,甲商场向农民销售某种家电下乡手机20部.已知从甲商场售出的这20部手机…
- 6某种储蓄的月利率是0.8%,存入100元本金后,本息之和用所存月数x表示的式子为 元.
- 7如今,网上购物已成为一种新的消费时尚,某书店想买一种贺年卡,在互联网上搜索了甲、乙两家网店,已知两家网店的这种贺年卡的质量相同,请阅读相关信息并回答问题: 甲网店:贺年卡元张,运费元,超过张全部打六…
- 8一次数学竞赛共有 20 道题.做对一道题得5分,做错一题倒扣2分,刘冬考了72分,你知道刘冬做对( )道题. A. 6 B. 12 C. 14 D. 16
- 9A chess club currently has 37 male members and 16 female members. The club hosted a Valentine's Day event to attract mar…
- 10A bag contains 2 gold balls, red balls and silver balls where is prime number and . The tota…
- 11李老师退休后,在社区开了个小店,第一次进货,他以每件元的价格购进了 件甲种小商品,以每件元的价格购进了件乙种小商品,且 . (1)若李师傅将甲种商品提价,乙种商品…
- 12一名老师带领 x 名学生到动物园参观,已知成人票每张30元,学生票每张10元.设门票的总费用为 y 元,则 y 与 x 的函数关系为( ) A. y =10 x +30 B. y =40 x C. y =10+30 x D. y =20 x
- 13丁丁家五月份支付水费与电费共140元,其中水费为a元,而六月份丁丁家的水费比五月份增加了10%,电费比五月份增加了20%. (1)试用a的代数式表示丁丁家六月份的水电费; (2)当a=40元时,问丁丁家五、六两个月水电费共多少元?
- 14铅笔每枝a元,买了m枝,付出b元,应找回 元.
- 15Town P and Town Q are 40 km apart. A car is travelling from Town P to Town Q at an average speed of x km/h. During its r…
- 16为鼓励居民节约用水,某市对居民用水收费实行“阶梯水价”,按每年用水量统计,不超过200立方米的部分按每立方米3元收费;超过200立方米不超过300立方米的部分按每立方米5元收费;超过300立方米的部分按每立方米6元收费. (1)设每年用水量…
- 17设某数为x,它的4倍是它的3倍与7的差,则列出的方程为 ;某种商品的标价为m元,顾客八折的优惠价购买此商品,共付款 元.
- 18已知青椒每斤元,西红柿每斤元,小张妈妈以每斤元混合买了斤青椒和斤西红柿,结果小张发现妈妈亏钱了,原因是 A. B. C. …
- 19建筑公司有红、白两种砖,其中红砖量是白砖量的2倍,计划建造若干座住宅.如果每座住宅需用红砖80立方米,白砖30立方米,那么红砖缺40立方米,而白砖多40立方米.建筑公司可建造多少座住宅?红砖有多少立方米?
- 20Alan drove a distance of km and his car used 7.5 litres of fuel. Write down an expression, in terms of , for the…
- 21“十一”黄金周期间,小刚拿着妈妈给的800元钱到重百商场购买运动服和运动鞋,他来到自己喜欢的“阿迪、达斯”专柜前看到该品牌打出的优惠条件:标价200元以内(含200元)不打折;标价200元以上的按如下方式打折:(1)200~500元(含50…
- 22John and Peter took part in a marathon race. They each ran 42 km. (a) John ran at a constant speed of x kilometres per h…
- 23Old MacDonald has a farm with a rock wall around it. The figure shows a portion of his farm where he plans to build two…
- 24我校今年学生节期间准备销售一种成本为每瓶元的饮料。据去年学生节试销情况分析,按每瓶元销售,一天能售出瓶;在此基础上,销售单价每涨元,该日销售量就减少瓶。针对这种饮料的销售情况,请解…
- 25Mr Lee and his wife are going for a family trip to Thailand. The table shows the travel insurance premiums payable for i…
- 26学校准备组织教师和优秀学生参加夏令营,其中教师名,现有甲、乙两家旅行社,两家全票价都是元,但优惠方式不同:甲旅行社表示教师免费,学生按八折收费;乙旅行社表示教师和学生一律按七五折收费. (1)当参加夏令营的学生人数…
- 27The number of blue, white and black masks Julian has is in the ratio 3 : 4 : 5. After exchanging 30 black masks for blue…
- 28甲队有32人,乙队有28人.现在从乙队抽x人到甲队,使甲队人数是乙队人数的2倍,根据题意,得出的方程是( ) A. 32+x=56 B. 32=2(28-x) C. 32+x=2(28-x) D. 2(32+x)=28-x
- 29The seating capacity of an auditorium is 300. The seats are categorised as 1, 2, 3 and 4. The costs of the tickets in th…
- 30烧一壶水,假设冷水的水温为,烧水时每分钟可使水温提高,烧了分钟后水壶的水温为,当水开时就不再烧了. 与…
- 31威宁粮食二库需要把晾晒场上的吨苞谷入库封存.受设备影响,每天只能入库吨.入库所用的时间为单位:天,未入库苞谷数量为单位:吨直接写出和间的关系式…
- 32A bag contains 150 chips. There are 60 blue chips, x red chips and y green chips in the bag. The probability of drawing…
- 33狗头枣产于陕西省延安市一带,久负盛名,其性味甘平,有润心肺、止咳、补五脏、治虚损的功效,已成为革命圣地延安最为著名的特产.某经销商购进了一批狗头枣,根据以往的销售经验,每天的售价与销售量之间有如下关系:当单价为元千克时…
- 34In the diagram, OAPB is a sector of circle with centre O and radius 9 cm. Angle AOB = 1.4 radians. C is the centre of th…
- 35The first four terms of a sequence are 5, , , . State the fifth term of the…
- 36A supermarket sold all of its toilet rolls at a price of $ per pack in January. The revenue made from selling the packs of toilet rolls in January was $5940. Write down an expression in x, for the number of packets of toilet rolls sold in January. Answer ... In February, the supermarket ordered an additional 600 packs to the number sold in January and sold them at 50 cents more per pack. Write down an expression in x, for the total amount of money received in dollars, if all the packs of toilet rolls were sold in February. Answer $ ... The supermarket received $3870 more from the sales of toilet rolls in February as compared to January. Write down an equation in x to represent this information, and show that it reduces to $$…
- 37某登山队大本营所在地的气温为,海拔每升高气温下降登山队员由大本营向上登高时,他们所在位置的气温是,用函数解析式表示与的关系为 ___ .
- 38k is a positive integer. An odd number is formed when 5 is subtracted from twice of . Write down an expression for th…
- 39一本书有100页,前两天小华每天看x页,她第三天应从第 页看起.
- 40两根同样长的绳子,第一根先截去全长的,再截去米;第二根先截去米,再截去余下的。两根绳子剩下的部分相比较…
- 41Emily is considering signing up for a new credit card and has shortlisted three options: Card A, Card B and Card C. Each…
- 42Simplify . Given that , evaluate when and …
- 43在一场篮球比赛中,小红共投中个三分球,个两分球,发球还的分,在这场比赛中,小红共得___分.
- 44一个数的倍减去的差,得,列方程为 ___ .
- 45The illumination, units, of a bulb varies inversely as the square of the distance, metres. It is given that the…
- 46下列语句不正确的是 A. 是代数式 B. 是整式 C. 的倍与的的差表示为 D. …
- 47新华社3月16日授权发布了《中华人民共和国经济和社会发展第十二个五年规划纲要》明确规定收入增幅要超过GDP增幅,某公司决定给员工加薪,月工资在m元的基础上增长10%,那么加薪后员工的月工资为 .
- 48Underline the following ratios that are equivalent to the ratio . Answer …
- 49根据某手机收费标准,从甲地向乙地打长途电话,前3分钟收费1.8元,3分钟后每分钟收费0.8元. (1)若通话时间为x分钟(x≥3),则应收费多少元? (2)若小王按此标准打一个电话花了8.2元,则这个电话小王打了几分钟?
- 50Kyle runs a tennis club. 54 of the members are adults and 31 are children. His aim is that at least 60% the members shou…
- 51七(1)班体育小组的同学,每人都会打篮球或排球,其中会打篮球的人数比会打排球的人数多人,两种都会的有人.设会打排球的有人,则该小组同学共有 ___ 人用含有的代数式表示
- 52小明买了2支钢笔,每支a元,营业员找给他c元,小明交给营业员 元.
- 53Benedict left his house to go to the library. He took the first bus, which travelled 5 km in minutes. He then alight…
- 54代数式可以把实际问题的数量关系用式子的形式表示出来,同时,代数式也可以代表很多实际意义,例如“酸奶每瓶3.5元,3.5a的实际意义可以是买a瓶酸奶的价钱”,请你给4x+y赋予一个实际意义 .
- 55的一半与的差是负数,则用不等式表示为 A. B. C. D…
- 56某农场原计划用天完成平方千米的播种任务,如果要提前天结束,那么平均每天比原计划要多播种 ___ 平方千米.
- 57某市出租汽车收费标准如下:不超过3千米收费8元;超过3千米的部分,每千米收费2元. (1)若行驶了2.4千米,则收费 元. (2)若行驶x千米(x>3),试用含x的代数式表示应收的车费. (3)若某人乘坐出租汽车行驶5千米应付多少元? (4…
- 58列等式表示:比a的3倍大4的数等于a的5倍,得 ___ .
- 59商场某种商品平均每天可销售件,每件盈利元,为了尽快减少库存,商场决定采取适当的降价措施,经调查发现,每件商品每降价元,商场平均每天可多售出件. (1)设每件商品降价元,则商场日销售量增加…
- 60Estate E and Estate W are 35 km apart. Jason cycles at an average speed of km/h from Estate E to Estate W. On his re…