1整式习题回顾一、基本概念1.单项式23xy-的系数是______,次数是_______。2.多项式2x-y的项有_______,______。3.多项式x-3x2是_____次_____项式。4.计算:)y(-2x-y3x22=_________5.把多项式224xx-2x-1按x的降幂排列是______________6.多项式1-2x3x2中,一次项是_____7.在多项式3x-2y+3y-2y+5中,与3x是同类项的是________8.请任意写出22abc的两个同类项_________9.把(a+b)当作一个因式,则3(a+b)-5(a+b)=__________10.写出一个系数为-3,只含字母x、y的3次单项式___________11.若4mn3b5a-b3a所得的差是单项式,则这个单项式为___________12.用代数式表示(1)比a小3的数;(2)比b的一半大5的数;(3)a的3倍与b的2倍的和___________________________________________________13.设甲数为a,乙数为b,用代数式表示(1)甲乙两数的和的2倍;___________(2)甲数的与乙数的的差;____________(3)甲、乙两数的平方和__________;(4)甲乙两数的和与甲两数的差的积。____________14.去括号填空:)(3cbax.15._____)(_________422ababaa.16.减去26xy等于25xy的代数式是.2整式的混合运算练习题二、基本运算;43845222222babaababbaab;2322222bababaab;78221624243xxbxxxxx22222.45.16.05.05.75.0yxxyyxxy.xaxaxa21522222222223333223xyyxyxyxyxxyxyyx3yzxzyx101515101113.3431323532323xxxx.4325222baababcbaabc22223432aaaaaaaa+(5a-3b)-(a-2b)3(2xy-y)-2xya2+2(a2-a)-4(a2-3a)7-3x-4x²+4x-8x²-158x²-[-3x-(2x²-7x-5)+3]+4xyxyaxyx2226.nmmnnmmn2222783.89266233xxxx.)69()3(522xxx.)324(2)132(422xxxx.]2)34(7[522xxxx222)(3)()(4)()(2nmnmnmnmnm.4三、综合计算1.已知:a+b=4,ab=1,求2a+3ab+2b的值。2.求代数式的值:(1)当x=-,y=-,求24x-y的值。3.已知:a=12,b=3,求的值。4.(5x-3y-2xy)-(6x+5y-2xy),其中5x,1y5.已知14nxy与425yxm是同类项,求nm2的值.6.)35()2143(3232aaaaaa其中1a.57.yxyxxyyx22227.03.05.02.0其中32,1yx.8.已知122xxA,3622xxB.求:(1)BA2.(2)BA2.9.已知01)1(2yx,求)3()5(222xyxyxyxy的值.10.把多项式yxyx3222写成两个二项式的和.11.已知32aba,12bab,试求222baba,22ba的值.