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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
_______ noisy , Nick! I’m doing my homework.
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Mary is _______ girl.
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My brother usually ___ his home work after dinner. But now he _____his homework before dinner.
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Jim, don’t ___the dirty dishes in the kitchen.
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Jim doesn’t want to eat carrots for lunch, and Kate doesn’t, _____.
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Nancy with her friends ___chess now.
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---What are the school rules?---We _____ eat in class.
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One of the boys____ a pet. The pet is really cute.
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--- Where do you swim? ---- In the _______ .
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The teacher often ______ us stories in class.
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How long does it take you _________ school every day?
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------______ do you think of this movie ? ------ It’s very interesting .
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-----_________ does it take to get to the school? ------ About 20 minutes.
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---- What are you doing? ----- I’m ________. It’s dirty.
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I can play____ chess, but my brother can play_____ guitar.
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______ exciting news it is!( )
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Where does Alice sit? ______
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I\’m John.I\’m 12 years old and 1.5 meters tall.Tom is my good friend.He is younger than me.But he is 0.02 meters taller than me.We usually play sports together on Saturday.Both of us like playing badminton best. But las
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Look!This is our new school!You can find three buildings and a playground.It\’s not very big,(1)______ it\’s really beautiful.We love it very much! As a new student of junior high,I make some plans.Firstly, (2)______ man
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Look at that boy.Who is he?He is my friend.His first name is Tom.His last name is Green.These are Tom\’s family.They are his grandparents,his parents,his brothers and his sister.He lives(居住)in Beijing with them.His broth
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