先化简，再求值：，其中．-八年级数学

更多内容推荐

• It is requested that the reporter _______ to blame for the wrong report.A．referring toB．referring to
• A direct air route _______ Chongqing and San Francisco is expected to open next month．A．linkingB．be
• 先化简，再求值(2a+1-1a-1)÷aa2-1，其中a=2．-数学
• 先化简，再求值：2x2-3xx-（x+1）2，其中x=3．-数学
• 化简求值：x2+2x+1x+2÷x2-1x-1-1x+2，其中x=2．-数学
• ____, I had to buy a new one.A．My dictionary losingB．My dictionary having been lostC．Because my dict
• I’m very happy ___ a chance ___ your school.A．to give… to visitB．giving… visitingC．to be given…to v
• 已知a2+2a=8，则1a+1-1a2-1÷a+1a2-2a+1的值为______．-数学
• 已知P=a2+b2a2-b2，Q=2aba2-b2，用“+”或“-”连接P，Q共有三种不同的形式：P+Q，P-Q，Q-P，请选择其中一种进行化简求值，其中a=3，b=2．-数学
• I received a letter yesterday that my mother would come to our school.A．saidB．saysC．sayingD．to say-高
• To learn the piece of music quickly, you'd better hear it ___ as many times as possible.A．playB
• 化简的结果为（）。-八年级数学
• 先化简2x-4x2-4÷2xx+2-1，再任选一个你喜欢的数代入求值．-数学
• ______ money, his parents couldn’t send him to university.A．LackedB．Lacking ofC．Lacked inD．Lacking-
• Under the environment of fierce competition, the only way John could imagine _______ stress was to g
• Elizabeth Blackwell, who in 1849 became the first woman ever a medical degree in the USA, fought wom
• 已知x=-32，求（1+1x+1）•（x+1）的值．-数学
• _____ on a clear day, far from the city crowds, the mountains gave him a sense of peace.A．If walkin
• 先化简再求值：x-32x-4÷x2-9x-2，其中x=-5．-数学
• 先化简，再求值：2x+1-1x2-1÷xx2-2x+1，其中x=5．-数学
• 请将aa-1÷a2-aa2-1+11-a化简，然后从-2、-1、0、1、2中选择一个你认为合适的数作为a的值代入其中求值．-数学
• Seeing the soldiers well _____ for the flood-fight, the general nodded with satisfaction.A．prepareB．
• 先化简，再求值：（1a+2-1）÷a2-1a+2，其中a=2．-数学
• 先化简，再求值：a-2a2-4+1a+2，其中a=3．-数学
• ——How wise of you to come round，but why？ ——______ that all is right.A．SeeB．To seeC．SeeingD．For seein
• You can hardly imagine the trouble the woman had______her children.A．brought upB．to bring upC．bringi
• In the reading room, we found her____ at a desk, with her attention____ on a book. A．sitting; fixing
• 化简：3ab-a3b+a2b2a2+2ab+b2÷a2-aba2-b2=______．-数学
• Can you imagine what difficulty he had ____ the work?A．to doB．doC．doingD．done-高二英语
• 先化简代数式2x+6x2-4x+4÷x2+3xx-2-1x-2，然后给x赋一个你喜欢的实数，求代数式的值．-数学
• 计算：①y7x÷(-2x)②a-2a-1-2a-3a-1③12m2-9-2m-3④x2x-1-x-1．-数学
• 先化简，再选择使原式有意义而你喜欢的数代入求值：1x+1-x+2x2-1•x2-2x+1x2+4x+4．-数学
• 先化简，再求值：(xx-1-1x2-x)÷(x+1)，其中x=2．-数学
• All of them try to use the power of the workstation ___ information in a more effective way.A．presen
• （x-xx+1）÷（1+1x2-1），其中x=3-1-数学
• When I came in, I saw her sitting in the sofa ______ in thought.A．to loseB．losingC．lostD．being lost-
• 在解决题目“已知x=2007，求y=x2-2x+1x2-1÷x2-xx+1-1x+1的值”时，小明误将x=2007看成了x=2001，但算出的结果仍然正确，你能说说是为什么吗？-数学
• ____ to Anne's birthday party, Mr. Brown is now searching shop after shop for a nice present fo
• A team, _____ two doctors and three policemen, ____ sent to search for the missing explorers.A．consi
• The living room is clean and tidy, with a dining table already _____ for a meal to be cooked.A．laidB
• 化简并求值：a2+2a+1a2-1-1a-1（其中a=2+1）-数学
• 化简：x2x2-4•2+xx2-2x-1x-2-数学
• 1+112+122=______；1+112+122+1+122+132=______；1+112+122+1+122+132+1+132+142=______；由此猜想1+1n2+1(n+1)2=_
• 计算：①-4x4-4-12-x；②a2a-1-a-1；③(x+2x2-2-x-1x2-4x+4)•xx-4，其中x=1；④15×3520÷(-136)；⑤45+1220-515．-数学
• 计算下列各题．（1）(x+y)•x2x2-y2+y2y-x；（2）a+2-42-a（3）a2-b2a2b+ab2÷a2-2ab+b2ab•1(b-a)2；（4）(x+2x-2+4x2-4x+4)÷xx
• 先化简3x+3x2-1-2x-1，然后选择一个合适的你最喜欢的x的值，代入求值．-数学
• A small plane crashed into a hillside five miles east of the city, _________ all the four people on
• Tony is a quiet boy and he is accustomed ______ at meals, which is always appreciated.A．not to talkB
• 先化简代数式：(x+2x2-2x-1x-2)÷2x2-4，请你取一个x的值，求出此时代数式的值．-数学
• 化简题：（1）2x-64-4x+x2÷(x+3)×x2+x-63-x；（2）-(-a2b)2•(-b2a)3•(1ab)4•(2a3)；（3）2+3yx2-3yx-12x+y312x-y3；（4）3-