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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|}=
精选练习题目
---Could you tell me when Mark Twain\’s first short story . ---Sorry,I haven\’t heard of it.( )
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I\’m going to buy a big house for my parents when I ______ enough money.( )
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Fill in the blanks with the given verbs 【1】By the end of last term, I _____reading ten books. (finish) 【2】I used to see them _____in the playground.( play) 【3】Comrade Li Dazhao ____into prison in 1927.( put) 【4】Yesterday
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—What\’s the matter? —My feet are hurting badly.The new shoes don\’t ________ me.( )
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大家在比赛前务必要做好热身. Everyone must make sure to ______before the match.
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keep,it,helps,to,healthy ______.
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My father is much ______(着迷的) about reading the books by the famous writers.
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Hutongs are old-style city streets.In Beijing,they are an important part of the city culture.Thanks to Beijing\’s long history,almost every hutong has its story,and some even have to do with historic activities.Different
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Flying is cheap now.(用in the future改写句子) Flying___ cheap in the future.
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很多中国菜是以简单的方式烹调的. Many Chinese dishes are cooked in ______ ways.
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DIY is becoming more and more popular.It stands(1)______ "Do lt Yourself." Many people like it.There are many(2)______ (reason) for this,and here are some of them. First,DIY is(3)______ (cheap) than buying something in t
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The weather in Sanya is not so_______as that in Jilin in winter,so my grandparents usually spend the winter in Sanya.( )
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I go to the movies ______ (first) a month.
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What are teenagers nowadays crazy about?Popular songs?Harry Porter books?Sports or online games?For me,the(1)______ is history. History is a part of my leisure time.Since I was 10,I\’ve been reading history books,(2)____
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— is it from your home to school? —It\’s about two kilometers.( )
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Air pollution was very serious in our city last year.(改成感叹句) ___ air pollution was in our city last year!
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I exercise at least twice a week .(就画线部分提问) ____ do you exercise?
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This weekend is quite for Jim.Because he has to study for the writing test.( )
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I_____why you arrived late for school.Please tell me.( )
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—It\’s 10 o\’clock.Where is Mike? —He _____ for a test in his room.( )
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