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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
He hurt his sister________ badly ________ she had to see a doctor. A.too, that B.so , that C.either, or D.too, to
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Our teacher reminds us ________ to study for the English test . A.remember B.to remember C.remembering. D.remembered
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The Monkey King can turn himself ________ different animals and shapes. A.in B.on C.at D.into
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An old man named Yu Gong tried _________the mountains. A.moves B.moving C.to move D.moved
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This pair of shoes doesn’t ________ me. Do you have a larger size? A.allow B.wear C.beat D.fit
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It’s ________hot today, so you can take off your sweater, Jim. A.a kind of B.a little bit C.a bit of D.a lot of
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It’s 7:00 a.m. Bob is still sleeping. Please ______. A.wake up him B.wake him up C.get up him D.get him up
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Tom ________ Mary in 2000. A.gets married to B.got married with C.gets married with D.got married to
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How kind you are! You always do what you can ________ others. A.help B.helping C.helps D.to help
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Andrea Bocelli never _______ ,which makes him a successful singer. A.takes away B.gives away C.gets up D.gives up
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We kept ________ him for a long time yesterday. A.waiting B.to wait C.waiting for D.to wait for
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I knocked at the door but ___________ answered. Maybe they went to the concert. A.nobody B.somebody C.everybody D.anybody
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There is no reason to keep your phone at hand during a meal ________ you have some important things. A.until B.if C.when D.unless
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—Nancy ________ us a report as soon as she ________ tomorrow. —How great! I will be there. A.gives; is arriving B.gives; will arrive C.will give; arrives D.gives; arrives
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—I think I am the shyest in my class. What should I do? —Be more active in class, ________ you can improve your ability to express yourself. A.so that B.unless C.or D.although
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—The wandering Earth (《流浪地球》) tells us a story about how people try to save the earth. —Yes. In the film humans choose to stay with the earth ________ running away from it. A.because of B.together with C.such as D.instea
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Lucy often me my best friend. They both have long curly hair. A.thinks; of B.reminds; of C.helps; out D.leaves; out
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几乎;接近 __________
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在……对面 __________
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寻找 __________
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