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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
A sperm whale is ______ (heavy) than a killer whale.
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Hello,boys and girls!I\’m Gina.I am a middle school student.My mother and I like books.You can see many books in our house. With my mother\’s help,our house is now a shared (共享的) library and it is tidy.Two bookcases are
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What\’s ______(these) in English?It\’s a cap.
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I ______ this film last month. It's very interesting.
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—Where is Mary? —Look! She ______ the flowers over there.
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_______ are like books,you don\’t need a lot of them as long as they are good.( )
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The two boys lost their bags. That's __________ they look sad.
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—_____your name Ruby? —Yes,_____.( )
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These are my books. (同义句转换) ______ books are ______.
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It\’s Saturday.Look at what these people are doing. City Weather Activity New York Ann is shopping with her mother.She wants to buy her father a shirt as his birthday gift. Shanghai It\’s raining heavily.Yang Ling is tal
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My name is Alice Green.I am(1)______ the UK and live in Guangzhou with my family now.(2)______?Because my parents work here.They are(3)______ in a school,and they both teach English.I have two brothers.They are Jim and T
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It\’s exciting football with my classmates during the holiday.( )
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Which picture can we match with "VR"?( )
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Sandy looks modern in the red boots.(同义句转换) The red boots __________________ Sandy.
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—What\’s the month between September and November? —It\’s ______.( )
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He is Harry Potter.His ______ name is Harry.( )
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Mary's mother's is next Monday. (生日晚宴)
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How much is this pair of ? (运动鞋)
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This meeting room isn\’t ______ for all of us to stay in.We need a bigger one.( )
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I will meet him ______ the morning _______ October 2nd( )
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