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1、 整式的乘法练习 姓名:知识链接：指数相加，系数相乘 3am-12am ；指数相乘 (2bn-2)3 ；系数相加 2c2 +c2。整式的乘法：单项式单项式,单项式多项式 多项式多项式平方差公式：（a-b）(a+b)=a2b2一、填空题aa2a3=_; a2n+1an+3=_;x2_=x6 ; (y2)_=y5 (x）2x3=_(a2)(a)3=_；(xy)3(yx)4=_; (ab)2n-1(ba)2n=_.(3)； ，；(4) (5) (6) (7) ；(8) (9) (10) (11) ； (x1)(x+2)(x+3)=_；(12) (3a + b) (3ab) =_, (2x23) (2
2、x23) = _；二、判断并作出更正(1)（x3）2=x2+3=x5 ( ) (2) a(a2)3=aa6=a7 ( )(3)（ ） (4) (3xm-3)3=9x3m-9 （ ） ( ) (6) ( )三、选择题(1)若3m =5，9n=10，则3m+2n =( )A、50 B、500 C、250D、2500(2)等于（）A、B、C、D、(3)等于（）A、 B、 C、D、(4)若（x3）(x+5)=x2mxn,则m,n分别等于（ ）A、2，15 B、2，15 C、2， 15 D、2，15(5) 设x0(n为正整数)，则n为（ ）A、大于1的整数 B、小于1的整数 C、偶数 D、奇数(6)下列
3、四个算式中,正确的是( ).A、a3a2=2a6 B、b3+b3=b6 C、 xx4=x4 D、y5+y5=2y5 (7)计算的结果中不含的项，则的值是（）A、1B、1C、D、0(8)若，则M、N分别为( )A、12， x3 B、20， x5 C、12， x + 3 D、20， x + 5(9)以下等式 （a4）m=( a)4m (3ambn)n=(3)nam+nb2n其中正确的等式有( )A、1个 B、2个 C、3个 D、4个(10)若，括号内应填代数式( )A、 B、 C、 D、(11)下列可以用平方差公式计算的是( )A、(xy)(x + y) B、(xy) (yx) C、(y + x)
4、 (xy) D、(xy) (y + x)四、计算题（写过程）(1)（2）（2）3（2）5(2)(3) (4)(5) (6)(7) (8) (9) （10）9288 (11)（xy）m(yx)2m+(yx)3m五、已知x +（y）2=0 ，求x(5y2) (x+1)(5y2)的值六、（1）比较3555，4444，5333的大小 （2） 比较550与2425的大小。七、解方程（不等式）(1) (2)九、已知：22x+322x+1=192, 求x的值 十、计算：(x)n(xn+1xn-13)十一、一块长m米，宽n米的地毯，长、宽各裁掉2米后，恰好能铺盖一间房间地面，问房间地面的面积是多少平方米？十二
5、、用总长为4米的篱笆围一个简易鸡舍,有以下方案可供选择:方案(1):将鸡舍围成一个正方形;方案(2):将鸡舍围成圆形.用数学知识说明哪种方案更好. .十三、若m,n为整数，且有(mx+a)(x-3a)=3x2+nax-3a2，求m,n的值十四、计算England, has been passed fit after a lower-leg injury, while Slater has been named at full-back but is still recovering from a knee injury aggravated against USA.Both sides boa
6、st 100% records heading into the encounter but Australia have not conceded a try since Josh Charnleys effort in their first pool match against England on the opening day.Aussie winger Jarryd Hayne is the competitions top try scorer with nine, closely followed by Tuivasa-Sheck with eight.But it is re
7、cently named Rugby League International Federation player of the year Sonny Bill Williams who has attracted the most interest in the tournament so far.The Kiwi - with a tournament high 17 offloads - has the chance of becoming the first player to win the World Cup in both rugby league and rugby union
8、 after triumphing with the All Blacks in 2011.Id give every award back in a heartbeat just to get across the line this weekend, said (lack of) air up there Watch mCayman Islands-based Webb, the head of Fifas anti-racism taskforce, is in London for the Football Associations 150th anniversary celebrat
9、ions and will attend Citys Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport.For me its about how he felt and I would like to speak to him first to find out what his experience was.Uefa hasopened disciplinary proce
10、edings against CSKAfor the racist behaviour of their fans duringCitys 2-1 win.Michel Platini, president of European footballs governing body, has also ordered an immediate investigation into the referees actions.CSKA said they were surprised and disappointed by Toures complaint. In a statement the R
11、ussian side added: We found no racist insults from fans of CSKA. Baumgartner the disappointing news: Mission aborted.The supersonic descent could happen as early as Sunda.The weather plays an important role in this mission. Starting at the ground, conditions have to be very calm - winds less than 2
12、mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. It will climb higher than the tip of Mount Everest miles/ kilometers), drifting even higher th
13、an the cruising altitude of commercial airliners miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.The balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.They
