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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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七年级·英语·填空题Unit 5 Water

It is not easy______ （learn） a foreign language well．

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七年级·英语·填空题Unit 5 Water

Our teacher often tells us______ （help） the poor．

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七年级·英语·填空题Unit 5 Water

My father always tells jokes to make us______（laugh）．

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七年级·英语·任务型阅读Unit 5 Water

Dora was in the bathroom． The tap was （A）． "（B） Turn the tap off ，" said an angry voice． "You are wasting water．" Dora looked （C）， but there was no one there． "Who are you？" "I'm a drop of water．" Do you know where I c

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七年级·英语·阅读理解Unit 4 Save the trees

阅读短文，下列问题 Most people in the office have a boss ( 老板 ) . So do I ( 我也是 ). But my boss is a little unusual. What’s unusual about him? It’s a big dog. Many men have dogs, but few men bring their dogs to the office every da

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七年级·英语·选择题Unit 4 Save the trees

Look! All people _______ fun at the beach.

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七年级·英语·选择题Unit 4 Save the trees

We can get many things _______ trees.

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七年级·英语·选择题Unit 4 Save the trees

The medicine kept the patient _______ for another month.

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七年级·英语·选择题Unit 4 Save the trees

We ________ oxygen _______ the air and release ( 释放 ) CO2 into the air.

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七年级·英语·选择题Unit 4 Save the trees

Be quiet! The students _______ a class now.

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七年级·英语·选择题Unit 4 Save the trees

I can't imagine a world _______ water.

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七年级·英语·选择题Unit 4 Save the trees

I'm going to the library today. I need some ______ about trees.

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七年级·英语·解答题Unit 3 Our animal friends

The Eiffel Tower is the tallest tower in Paris． It is 324 meters tall． It took two years to build this wonderful tower and it was finished in 1889． Now the tower is painted every seven years． Every year， almost 7，000，000

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七年级·英语·填空题Unit 3 Our animal friends

France is in Western Europe． It is a country with many beautiful places． Paris is the capital of France． Here you will find many famous places of interest such as (1) You can go to the Louvre Museum if you like (2) The m

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七年级·英语·句型转换Unit 2 Travelling around the world

I reached the hotel at 7．（同义句） I______ the hotel at 7． I______ the hotel at 7．

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七年级·英语·句型转换Unit 2 Travelling around the world

There are many vineyards in the centre of France．（对画线部分提问） ______ in the centre of France？

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七年级·英语·句型转换Unit 2 Travelling around the world

Faku lies in the north of Shenyang ．（对画线部分提问） ______ Faku______？

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七年级·英语·句型转换Unit 2 Travelling around the world

People buy flowers and make cards on Mother's Day．（对画线部分提问） ______ People______ on Mother's Day？