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#1 · 常错题

#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·填空题整数表达<br/>

（2019七上·全州期中）There are (四十）students in my class.

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九年级·英语·填空题不可数名词

Smoking is bad for your ______.（healthy）

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九年级·英语·补全对话判断与评价,行为,购物,喜欢与不喜欢,请求与提供帮助

Shop worker: Good morning, what can I do for you? John: I'd like to buy a T-shirt. Shop worker: (1) John: Large, please. Shop worker: Here you are. John: Thank you. (2) Shop worker: Certainly. John: Hmm, the size is OK.

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九年级·英语·信息匹配论说文,学习

Good grammar matters Why is good grammar important? Well, good grammar can save lives! Just consider the difference between "Let's eat. Grandma!" and "Let's eat Grandma!" With the first one, you are inviting your grandma

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九年级·英语·阅读理解直接理解,文章大意,个人故事,日常生活,逻辑推理

When I arrived at my class on the early morning, I suddenly felt upset and uncomfortable. Today was the day when our teacher would leave and move to another school. Mr Smith was very easy to talk with and to have fun wit

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九年级·英语·阅读理解直接理解,科普知识与现代技术,语意转化,现象说明、介绍,观点态度

Can laughing every day help keep the heart attack（心脏病） away? Maybe so. Laughter, along with an active sense of humor, may help protect people against the heart attack, according to a recent study from the University of M

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九年级·英语·阅读理解直接理解,数字计算,旅游,语意转化,广告,正误判断

Your complete guide The Palace Museum Facts about the Palace Museum •Things to see: imperial living and governing quarters, valuable artworks, and traditional gardens •Time needed: at least 2-3 hours •Location: the cente

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九年级·英语·填空题名词辨析,必备词汇,can/could的用法,动词辨析,个人故事,副词辨析,世界与民族,形容词词义辨析

Bringing water to Liberians Destinee Whitaker was in the fourth grade when she first knew millions of people in Liberia (利比里亚）didn't have clean water. "It made me feel (1) , " the girl said. "Not everyone had what I had.

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九年级·英语·选择题祝贺与祝愿

—I' m going to take a vacation tomorrow. —Oh, good! .

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九年级·英语·选择题宾语从句的语序,连接副词when引导宾语从句

— Do you know ______? —At the end of September.

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九年级·英语·选择题动词短语辨析

My grandfather________newspapers for the latest news every morning at home.

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九年级·英语·选择题不定式作主语,固定句型

It is easy ______ new words. Try to read the words when you see them, and try to use them.