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#2 · 常错题

将循环小数化为分数:整数、有限小数、循环小数都可以化成分数,整数和有限小数化成分数容易,循环小数如何化成分数呢?请看下面的例子. 将循环小数$0.288\ldots $化成分数:将$0.288\ldots $分别乘$10$和$100$,得$2.88\ldots $和$28.88\ldots $,两个得数相减得$26(两个得数小数部分相同)$,而相减所得的$26$应该是$0.288\ldots $的$\left(100-10\right)

#3 · 常错题

今年市委市政府积极推进创建“全国文明城市”工作,市创城办公室为了调查初中学生对“社会主义核心价值观”内容的了解程度\((\)程度分为:“\(A-\)十分熟悉”,“\(B-\)了解较多”,“\(C-\)了解较少”,“\(D-\)不知道”\()\),对我市一所中学的学生进行了随机抽样调查,根据调查结果绘制了两幅不完整的统计图如图,根据信息解答下列问题: \((1)\)本次抽样调查了多少名学生; \((2)\)补全条形统计图和扇形统计图; \

#4 · 常错题

#5 · 常错题

一批水果的标准质量是$30$千克,超出标准质量记为正,低于标准质量记为负,现记录如下:$+8$,$-9$,$-5$,$+7$,$-8$,$-6$,$+7$,$+10$. $(1)$这批水果总共有多少千克? $(2)$第一天按每千克价格$5$元卖出了这批水果的一半,第二天为了吸引顾客把第一天卖水果的价格降价$20\%$后作为新的价格,卖完了剩下的水果,请计算一下这批水果一共卖了多少钱?

#6 · 常错题

分类讨论思想是数学的重要思想,在学习有理数的过程中,也深有感受$!$ $(1)$当$ab \lt 0$时,若$b \gt 0$,$|a| \lt |b|$,则$a+b \_\_\_\_\_\_0$; $(2)$当$abc \lt 0$时,若$ab \gt 0$,则$c \_\_\_\_\_\_0$; $(3)$已知$a$,$b$,$c$是非零有理数,则$\frac{a}{|a|}+\frac{b}{|b|}+\frac{c}{|c|}=

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九年级·英语·选择题时态辨析

-Oh!What\’s wrong with your finger? - I hurt it while I ___________ a model plane.( )

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九年级·英语·选择题问候

---Tom,you look unhappy, ? ---Well,I saw my mother look through my mobile phone yesterday.( )

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九年级·英语·选择题时态辨析

-Has your friend completed his design? -Not yet.He ________ on it last night.( )

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九年级·英语·填空题问路与应答

Peter:Excuse me,sir!(1)______? Li Hua:Sorry,I am new here.You can ask the lady over there. Peter:Thank you all the same. (A moment later) Peter:Excuse me.(2)______? Wang Lin:No,there isn\’t a bank near here.but there is

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九年级·英语·信息匹配语篇范围

One day.I picked up my daughter Eloise from school and went to the supermarket for a few things. (1) so that I could get home earlier to prepare supper. I found a short line with just one person in front of me.It was an

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九年级·英语·阅读理解个人故事

Liu Jichen,a student from Tsinghua University,has developed a WeChat mini-program called"Clear Plate".After a meal,users can open the mini-program and take a picture of their empty plates.Once the picture is recognized b

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九年级·英语·阅读理解文娱与体育

In July,China introduced the "double reduction" policy.It hopes to reduce schoolwork burden(负担) on primary and junior high school students.The policy calls for reducing homework and after-school classes. According to the

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九年级·英语·阅读理解广告

April Hot SALE At Nobel Book Store! To celebrate our 30th birthday,we are having a big sale! Children's books Textbooks Picture books Story books 25% off 30% off 20%off 20% discount(折扣)on all adults' books! Amazing event

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九年级·英语·阅读理解个人故事

One day,a boy called Tom decided to give up his life.To this end,He went to the forest and had one last conversation with God. "God,can you give me a reason not to give up?" he asked. The god's answer surprised Tom: "loo

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九年级·英语·单词拼写/单词释义写作表达

这些照片让我想起了我的爷爷。 These photos ______my grandfather.

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九年级·英语·单词拼写/单词释义写作表达

猴王为什么不能把自己变成人? Why don't the Monkey King ______a man?

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九年级·英语·解答题篇章理解

Bill Gates is one of the world's richest men.He and his company,Microsoft,helped make computers cheap and popular.So what's he interested in now?Toilets. You might not think much about what happens after you use the toil

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九年级·英语·解答题篇章理解

More children in China are putting on weight.In 2018,16 percent of Chinese children and teenagers were overweight or obese (肥胖的),according to the National Health Commission. (A) .According to the World Health Organizatio

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九年级·英语·单词拼写/单词释义语篇范围

use express pair guest total like make spirit important spend name full In August 2018,a worldwide competition was started to create the mascots for the Beijing 2022 Winter Olympic and Paralympic Games.A(n) (1) of 5,816

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九年级·英语·信息匹配语篇范围

Children's life has changed a lot in the past few years.But do they have a happier childhood than we did? (1) I have four brothers and sisters,and my memories are all about being with them.We used to play board games in

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九年级·英语·阅读理解日常生活

Playing video games can be a fun way to spend time with friends.In some schools,teachers use games like Minecraft to encourage teamwork and communication. But for some players,gaming is an unhealthy habit.They stay up la

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九年级·英语·阅读理解广告

中国国家博物馆 NATIONAL MUSEUM OF CHINA You can book a free ticket in advance or get one on the day of visit.But if you see special exhibitions in the NMC,you should pay for the ticket.If you don't book a ticket,you can go to t

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九年级·英语·阅读理解卫生与健康

Recycle,reduce and reuse are three golden rules of environmental protection.Today we'd like to talk about the fourth rule:repair. In old days,when something broke,people sent them to repairmen.Nowadays,however,the idea o

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九年级·英语·填空题说明文

Sometimes it may be hard to tell others that you're feeling sad or worried.But if you keep these (1) in your heart and don't talk about them with others,you may fall ill at last!You can talk with someone who (2) a lot ab

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九年级·英语·补全对话英文要点

A: Hi, Rick. Zhou Ming invited us to have dinner with his family. B: Really? I'd love to go. (1) A: Sure. In China people put all the dishes on the table and they share the food. B: That's interesting. I know they usuall

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