将代数式尽可能化简，并选择一个你喜欢的数式入求值：2a-(a+1)+a2-1a-1．-数学

更多内容推荐

• 先化简，再求值：（1-1x）÷x2-2x+1x2-1，其中x=2．-数学
• 先化简，再求值：（2-4x）÷x2-4x，其中x=-4．-数学
• 已知实数a满足a2+2a-8=0，求1a+1-a+3a2-1×a2-2a+1a2+4a+3的值．-数学
• 先化简，再求值：，其中-九年级数学
• Canada，Australia and New Zealand are all ____ countries.A．spokenEnglish B．EnglishspokenC．speaking
• 化简：(1x-1x+1)•x-数学
• As time went by, the plan he stuck ____ fairly practical. A．to provedB．to provingC．provedD．to be pro
• 化简：（4x2-4+1x+2）÷1x-2-数学
• with an important decision, one that can affect his future, he doesn’t know what to do.A．FaceB．Faci
• David stayed inside himself, ______ to be alone, or in a corner of the cabin.A．to wantB．wantedC．bein
• 化简：(4x2-4+1x+2)÷1x-2-数学
• I can’t stand _____ with Jane in the same office. She just refuses ____ talking while she works.A．wo
• 先化简，再求值：，其中x=，y=-九年级数学
• 先化简，再求值：(3xx-1-xx+1)×x2-1x，其中x=2-2．-数学
• 先化简，再求值：9-6m+m22m-4÷(m+2-5m-2)，其中m=3-3．-数学
• 若x2-9=0，求分式x2-5x+6x-3的值．-数学
• The detective,____ to be reading a newspaper, glanced at the man_____ next to a woman.A．pretending,
• 当x=3-12时，求代数式(x2-x+2x2-1-1x-1)÷(1-1x-1)的值．-数学
• —Would you mind my _______ your speech? —Not at all. Go ahead. A．recordB．to recordC．recordingD．of re
• 设a﹣b=ab，则的值是（）。-八年级数学
• 先化简，再求值：12x-1x+y（x2-y2+x+y2x），其中x=2，y=3．-数学
• 化简(x2-4x2-4x+4+2-xx+2)÷xx-2，其结果是（）A．-8x-2B．8x-2C．-8x+2D．8x+2-数学
• 先化简x-33x2-6x÷（5x-2-x+2），再选一个适当的x代入求值．-数学
• It rained heavily in the south, serious flooding in several provinces.\A．causedB．having causedC．cau
• to work overtime that evening, I missed a wonderful film.A．Having been askedB．AskingC．Having askedD．
• If you have any difficulty ____ how to skate, you can turn to Jacky.A．learnedB．to learnC．learningD．l
• 先化简，再求值：m2-6m+9m2-4÷(m-4m-9m-2)•1m，其中m是方程2m2+4m-1=0的解．-数学
• The student, in Jinshan Middle School for 3 years, was admitted into Qinghua University.A．to studyB．
• 先化简，再求值：(1+1x)÷x2-1x，其中x=2．-数学
• 已知a≠b，且a2-13a+1=0，b2-13b+1=0，那么b1+b+a2+aa2+2a+1=______．-数学
• ______ money，it remains to see whether we can put the idea into practice.A．LackingB．LackedC．To lackD
• 已知，请先化简，再求代数式的值：。-九年级数学
• 化简，求值：，其中m=．-八年级数学
• When I got back home, I saw a message pinned to the door“ Sorry to miss you, I will call later.”A．re
• 已知，x≠0，y≠0，x≠y，则=().-八年级数学
• You will see the products of Liu Ling alcohol________on every avenue of Baoding city.A． advertiseB．
• Mother told me ________a noise in the hall.A．don’t makeB．make not toC．not to makeD．to make not-高一英语
• __________that no one enjoys__________________.A．He seems; to be looked down onB．He is seemed; being
• He sent me an E-mail, _____ to get further information. A．hopedB．hopingC．to hopeD．hope-高二英语
• 先化简，再求值：，其中．-九年级数学
• 有一道题“先化简，再求值：，其中x=﹣．”小玲做题时把“x=﹣”错抄成了“x=”，她最后的计算结果是否正确_________．（填“是”或“否”）-九年级数学
• 先化简：，选择一个你喜欢的无理数，然后再求值．-九年级数学
• 先化简，再求值：-九年级数学
• 先化简，再求值：其中-九年级数学
• Under the new policy, anyone who is found ______ in the school building will be fined $60.A．smokeB．s
• All the citizens, young and old, walked and sang, beautifully _____ in new clothes of all kinds, ___
• 先化简，后计算：，其中.-九年级数学
• Time ____ never comes again. So we’d better make full use of our time. A．losing B．lostC．being lost D
• The patient was warned ________ oily food after the operation..A．to eat notB．eating notC．not to eatD
• He got well-prepared for the job interview, for he couldn't risk ______ the good opportunity. A