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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
Next week,each student in the class ____ a small gift from their teachers.( )
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Tom often TV on Sundays.Today is Sunday.He TV now.( )
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I have seen two foreign films. One is made in Canada, and _______ is made in the USA. A.another B.the other C.other D.the others
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If you want to be a basketball player,practicing hard is the key to ______. A.success B.silence C.treasure D.dream
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When the boy saw his mother,he ran______her. A.with B.at C.towards D.from
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Mom,I am going to ______ my best friend to you this afternoon. A.achieve B.protect C.introduce D.visit
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— ______, or we’ll be late for the meeting. — It’s only half past one by my watch. We have enough time left. A.Hurry up B.Don’t worry C.Never mind D.Be quiet
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---Look at the blue sky! The rain _________. ---Let’s go out for a walk. A.stops B.will stop C.has stopped D.had stopped
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People often use it ____ ships. A.build B.builds C.to build D.building
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There are ____ soccer fans in the world. A.million B.three millions C.million of D.millions of
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I like Miss Zhao because her lessons are ________. A.live B.lovely C.lively D.living
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Sally hasn’t finished her homework. ______ she didn’t write a word at all. A.Suddenly B.Hardly C.Actually D.Truly
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The storybook ________ Lucy.Don't take it away without telling her. A.is B.belongs to C.was D.belongs with
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—Oh, dear. Would you like to eat? —No, thanks. I’m full. A.else something B.else anything C.something else D.anything else
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—Excuse me, Linda. I don’t know your friend. Can you her to me? —Sure, I can. A.introduce B.lead C.record D.mark
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—Have you seen the movie The Lion King ________? —Yes. I’ve ________ seen it. It’s wonderful. A.already; yet B.yet; yet C.already; already D.yet; already
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He cooked healthy food for the children,______ meat,rice and vegetables. A.include B.included C.includes D.including
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Now there are many tigers ______in the forests because of protection. A.to live B.living C.live D.lived
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—When did you ______ the top of the mountain? —At 11:45 a.m. A.arrive B.reach C.get D.climb
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—Is your son ______? —No. He is asleep. A.clever B.happy C.healthy D.awake
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