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如果$a$与$2$互为相反数,那么$|a-3|$等于（ ）

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在平面直角坐标系中，点\(P(-2,x^{2}+1)\)所在的象限是\((\) \()\)

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已知有理数$a$、$b$在数轴上的位置如图所示. $(1)$请判断下列各式的符号:$a+b \_\_\_\_\_\_0$,$b-a \_\_\_\_\_\_0$,$2-a \_\_\_\_\_\_0$； $(2)$化简:$|a-b|+|b-a|+|2-a|$.

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已知:$B=2a^{2}-2ab+3$,且$A+3B=6a^{2}-7ab$. $(1)$求$A$等于多少? $(2)$若$|a+b|+\left(b-2\right)^{2}=0$,求$A$的值.

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请把下面的有理数填在相应的集合内: $1$,$0.0708$,$-700$,$-3.88$,$0$,$3.14$,$-\frac{7}{23}$,$0$.$\stackrel{•}{2}\stackrel{•}{3}$. 正有理数集合:$\{ \_\_\_\_\_\_\ldots \}.$ 负整数集合:$\{ \_\_\_\_\_\_\ldots \}.$ 正分数集合:$\{ \_\_\_\_\_\_\ldots \}.$ 非负整数集合

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已知$a$,$b$互为相反数,$c$和$d$互为倒数,$m$的绝对值为$2$,求$\frac{2024(a+b)^2}{2025}-m^2+3cd$.

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有理数$a$在数轴上的位置如图所示,下列各数中,可能在$0$到$1$之间的是（ ）

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下列问题情境,能用加法算式$-2+10$表示的是（ ）

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$-11$,$5\%$,$-2.3$,$\frac{1}{6}$,$3.1415926$,$0$,$-\frac{3}{4}$,$\frac{9}{3}$,$2014$,$-9$ 正数集合:$\{ \_\_\_\_\_\_\ldots \}$ 负数集合:$\{ \_\_\_\_\_\_\ldots \}$ 整数集合:$\{ \_\_\_\_\_\_\ldots \}$ 分数集合:$\{ \_\_\_\_\_\_\ldots \}$

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比较两数大小:$-|-3|\_\_\_\_\_\_-\left(-3\right)($填"$ \lt $","$=$"或"$ \gt $").

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已知有理数$a$,$b$,$c$在数轴上的位置如图所示,并且$|a|=|b|$. $(1)$用"$ \gt $""$ \lt $"或"$=$"填空:$a \_\_\_\_\_\_0$；$a+b \_\_\_\_\_\_0$；$a-2c \_\_\_\_\_\_0.$ $(2)$化简:$|a|+|a+b|-|a-2c|$.

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Look!The boys of the Class 2 are playing football in the football ______（场地）.

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Do you want to have fun with your favourite Disney characters?Soon,you can enjoy yourself at Shanghai Disney Resort—the sixth Disneyland park in the world. It will have new attractions for Chinese people.Here are some of

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Sandra was a seven-year-old girl.Her best friend was her neighbor,but she moved to another city about a month ago.Sandra was unhappy about her friend\’s move.Now they send emails and text messages to keep in touch. Last

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NOTICED BOARD Lost My black handbag was lost in the school library last Wednesday.My student certificate and key to my bike are in it. Will the finder please call David at 39363096?Thanks a lot! David Football Match Clas

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Harry did not stop his car at some traffic lights when they were red,and he hit another car．Harry jumped out and went to it．There was an old man in the car．He was very frightened and said to Harry．"What are you doing?You

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Do you know some people often love to play this game?It is an interesting game（1）______"Musical Chairs"．It is easy to play and most people enjoy it．What you（2）______are some chairs and a tape-recorder．Put the chairs in a

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-Don't shout in the library．Please keep quiet．- ．（ ）

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-Would you like cakes?They are so delicious．- ．I'm full．（ ）

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Amy's father is a manager．He works in a ．（ ）

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