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高频错题
#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|}=
精选练习题目
Tom: Hello! May I speak to Betty? Betty: Speaking. Who's that? Tom: This is Tom. We are going to have a picnic tomorrow. Would you like to join us? Betty: Where are you going? Tom: To the country Park in Pudong. Betty: R
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Rewrite the following sentences as required (根据所给要求 , 改写下列句子) 【 1 】 I'd like a piece of pizza. (改为一般疑问句) __________ you ____________ a piece of pizza? 【 2 】 Alice gave me a doll as a present. (对划线部分提问) __________ _______
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Complete the sentences with the given words in their proper forms(用括号中所给单词的适当形式完成下列句子): 【1】He bought a new house last month. He wants to ______________it. (decoration) 【2】The toy car needs two______________. (battery) 【3
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-I can't take part in your birthday party. I have to write a report tonight. -___________________________.
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-I'll go to Qingdao for a trip. What about you? - I have to stay at home. ________.
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Great (mind) often make great contributions to our society.
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The professor had three (lecture) tonight.
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The Summer holidays are coming. I am thinking of (go) on a trip to Beijing.
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To pass the exam, you'd better go over the lessons ________ heart.
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— I didn't hear you come in just now. —That's good. I tried ______ the baby up.
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一 Why didn't you join in the activity last night?一 Because I had a fever.
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一 Taking these pills will ____________ your pain.— Thank you for your advice.
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— Peter went to bed last night, without his homework _____. — I don't believe it. Peter is not _____ lazy a boy.
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What great fun it is______(decorate) the Christmas tree!
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Mr. White finished______ (fix) the watch last night.
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Thanks a lot for______ (agree) to let us go on the school trip.
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My mother asks me to keep______(write) in English about my daily life.
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Mike is over there. Can you see Lucy and him______ (exercise) in the playground now?
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---I hope to take the DIY course at weekends. ---Good idea.______ (know) more about it, visit the website.
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What a good time we had______ (take) a boat trip to Xitang last Friday.
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