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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·阅读理解科普知识与现代技术,文章大意,语意转化,词义猜测,现象说明、介绍,文章出处

Scientists have long predicted that warmer temperatures caused by climate (气候） change will have the big influence on the world's poorest people. New research now suggests that has already happened over the past years. A

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九年级·英语·阅读理解直接理解,段落大意,语意转化,个人故事,日常生活,目的意图

Online study can be hard. Zech Hipp was doing it with great difficulty. Zech is 15 years old. He lives in Seattle, Washington, with his four brothers and his mother. "It's hard to stay focused," he said, "I can't stay fo

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九年级·英语·阅读理解直接理解,数字计算,广告,居住环境,正误判断

Apartment to rent, 16 Baddesley Road, Little Haddern Village We have a comfortable three-bedroom apartment to rent（出租）. The apartment is in very good condition! ●one large living room ●three bedrooms ●big kitchen ●small

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九年级·英语·阅读理解直接理解,语意转化,动物与植物,逻辑推理,童话

Nezumi was a mouse. He was thinking about finding a husband for his daughter Suki. But Suki said,"Father, I wish to marry Taro." Taro was smart and strong, but Taro's parents were not rich or powerful. "My Suki can't mar

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九年级·英语·补全对话存在,能够与不能够,购物,请求与提供帮助,提议与建议,可能与不可能

A: Hello, this is Sunny Flower Shop. (1) B: I want to buy some flowers for my grandma. Tomorrow is her birthday. A: (2) What kind would you like? B: I'm not quite sure. (3) A: Certainly, What about carnations (康乃馨）? They

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九年级·英语·选择题宾语从句的语序,连接副词where引导宾语从句

一Excuse me. Do you know ？一Yes.You can go to Furong Street.

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九年级·英语·选择题动词短语辨析

— When did Bob and Victor arrive at the meeting? — They were late. They didn't ______ until three o'clock.

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九年级·英语·选择题时态辨析,will/shall+动词原形表示将来的动作或状态,if 引导条件状语从句

My hometown has changed a lot in the past few years. You______the changes if you come.

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九年级·英语·选择题同意与不同意

— We must do something to protect the wild animals. —______. Some of them are in great danger.