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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
—________ is the mountain in the village? —It’s about 2,000 meters high. A.How wide B.How old C.How long D.How high
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This morning I ________ on the ice and hurt my left knee. A.fell over B.lay down C.dressed up D.hung out
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The supermarket was the first one ________ jobs for the deaf. A.providing B.to provide C.losing D.to lose
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The house is too small for the family ______. A.live in B.living in C.to live in D.lives in
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In order to finish the project,we'll have to work ______ hours a day. A.more two B.two more C.two another D.other two
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—Why did you open the window? —Because I want to ________ more fresh air. A.turn down B.take up C.put up D.take in
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—Feel free ________ me if you have any problem. —That's very kind of you. A.ask B.asks C.to ask D.asking
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—Don't give up ________ to achieve your dreams. —OK.I will try my best. A.try B.trying C.to try D.tried
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As we know,China has the ________ population in the world. A.most B.more C.largest D.larger
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—We should be brave when we are ________ the face of difficulty. —I agree with you. A.with B.in C.from D.through
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You spend too much time on your mobile phone. You are supposed to ________ the time you spend on it. A.cut off B.cut down C.cut up D.cut in
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为了 __________
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—Would you please go to the movie with me tonight? —Sorry, I need to prepare for the exam. ________ I know, Tom wants to see a film tonight. A.As far as B.As long as C.As soon as D.As often as
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Just like humans, animals will do their best to protect their young babies when they are ________. A.in danger B.on duty C.in need D.on time
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LeBron James is one of ___________ players in the NBA.He is my hero. A.better B.the best C.worse D.the worst
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I couldn’t believe that they ________ in solving the problem. A.included B.got C.woke D.succeeded
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France is ______European country, while Japan is _______Asian country. A.a; a B.an; an C.an; a D.a; an
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I couldn’t stop ________ after I heard the news. A.laugh B.to laugh C.laughing D.laughed
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His first book _____ in 2008. A.went out B.got out C.tried out D.came out
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My brother will lead you _______ to my house. A.go B.going C.to go D.went
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