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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
I was told that my father had bought me a new bike.The good news made me______.( )
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I wonder whether buying an electric car ____ a good idea.( )
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-I can't find the magazine I bought this morning. -Well,Jack is reading _____over there.Why not go and see if it is yours?( )
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-What do you think of the environment here? -Wonderful! of the land covered with trees and grass.( )
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About ______ of the land ______ covered with trees and grass.( )
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---There are so many interesting books in the library! ---Yeah,but I can't decide ________.( )
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The twins fond of the new idea in the magazine article.( )
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—Whose book is it? —It’s _________.
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—Is _____ ready for the trip? —No, we haven’t got a camera.
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完成句子 怀特先生去年死于肺癌。Mr White (1) (2) lung cancer last year. 【小题】 【小题】
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-You mustn't swim here. look at the sign. It __________ "No swimming". -Oh, I ________ notice it. Thanks for telling me.
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The food in the restaurant is delicious .( )
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We find impossible for us to learn a foreign language well in a short time.( )
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I visited the zoo last Sunday.( )
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Everything changed ________ quickly that I hardly had time to prepare.
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- did you tell Anna about the story? -By___ an e-mail.( )
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—Did you win the volleyball game yesterday? —It\’s really a pity though we have teamwork.( )
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Jenny didn\’t go to bed________ her father got back home last night.( )
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-______ the little boy is only 5 years old,______ he can read and write. -What a clever boy!( )
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______he was very tired,he continued his work.( )
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