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有理数计算题1、38+(22)+(+62)+(78)3、(一23)+|63|+|37|+(77)7.5)7、(一8)+(31)+2+(2)+122.4)9、(-6.37)+(-3-3)+6.37+2.7510、(墟)(-4)11、(+6.1)(4.3)(2.1)5.112、 (一j)(11)(1幻一(+1.75)13(33)(2上(1| )(1.75)148459+4_6-3116(0.5) (3-1)+6.755g2、( | )+0+(+ -4)4、(-8.25)+8.25+(-0.25)+(-5.75)+(-5、(+18)+(-32)+(-16)+(+26)6、5-5+(-5号)+4I+(-& (0.8)+(1.2)+(0.6)+(1112172-(+10)+(-8)-(+3)335519(-0.25) X (-号)X4X (-7)19221)-8721+53-1279+43一21 21(23)(41+14)X56(25)(36) X (94 + |7)(27)(66) X1|2(i) + (h)(29)(汾 +46+9)X72(31)2+(518) X吉(33)8X(14) + (8)4318598-12-31上-845520(3) X (4) X (12)(22)4X(96) X (0.25)X(24)(5今一9)X36(26)(弓)X(830.4)(28)25X3(25) X今+25X1(30)3X(2寻2)X( 1)X(磊)(32)侶+(3) X(4)(34)(号f ) + ( 1)(-0.5)-(- 31)+6.75- 5g(52)178- 87.21+43疏+531912.79(36)3.5X(60.5)X-3昌17*(一1 6)X1IX(7)7X务寻十4(40)0.8X召+4.8X(兔)2.2十号+0.8X盘2+(7)X4十(5斗)(44)：151-(1寸+3弓:+(吗)1 X(5) + (土)X5(46)-(壬-2+14一珂)+ (742)-13 x2 -0.34X+3X (-13)占X0.34(48)(-13) X (-134) XiVX (-67)(-1650+31 ) + (- 2)(50)(- 4-8)-(-5今)+(-4寸)-31(35)(37)(39)(41)(43)(45)(47)(49)(51)(6342057) X (15 4)(42)召寻(一24)-(2| )(53)(14)15+召十42)(54)|3|TO (15) X-1(55)13X(7 16)T24(56)(2-334+117)*(14)X( 7)5(57)33X 5)+16f 2)3|4X5|+( 0.625)2821(60)1(3)33+X 1一): f2)323ab-4ab+8ab-7ab+ab=_ .4.7x-(5x-5y)-y=_5. 23a3bc2-15ab2c+8abc-24a3bc2-8abc=_.6.-7x2+6x+13x2-4x-5x2=_ .7. 2y+(-2y+5)-(3y+2)=_.11. (2x2-3xy+4y2)+(x2+2xy-3y2)=_12. 2a-(3a-2b+2)+(3a-4b-1)=_ .13. -6x2-7x2+15x2-2x2 =_ .14. 2x-(x+3y)-(-x-y)-(x-y)=_ .16. 2x+2y-3x-2(x-y)=_17. 5-(1-x)-1-(x-1)=_18. ()+(4xy+7x2-y2)=10 x2-xy.19. (4xy2-2x2y)-()=x3-2x2y+4xy2+y321 .已知 A=x3-2x2+x-4,B=2x3-5x+3,计算 A+B=_ .22已知 A=x3-2x2+x-4,B=2x3-5x+3, 计算 A-B=_23若 a=-0.2,b=0.5, 代数式 -(|a2b|-|ab2|) 的值为_ (58)(5)(5)X丄X-5)10 10(59)(4)X 5)f 7)(*25.个多项式减去 3m4-m3-2m+5 寻-2m4-3m3-2m2-1,那么这个多项式等于26-(2x2-y2)-2y2-(x2+2xy)=_ 27 .若-3a3b2 与 5ax-1by+2 是同类项,则 x=_ ,y=_28.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=.29. 化简代数式 4x2-7x2-5x-3(1-2x+x2) 的结果是 _.302a-b2+c-d3=2a+( )-d3=2a-d3-( )=c-( )31 3a-(2a-3b)+3(a-2b)-b=_32化简代数式 x-y-2x-(x+y) 等于_335a2+( )a-7+( )a2-4a+( )=a2+2a+1343x-y-(2x+y)=_35.化简 |1-x+y|-|x-y|(_ 其中 xv0,y 0)等于 .36. 已知 x y,x+y -|x-y|=_ .37. 已知 xv0,yv0,化简 |x+y|-|5-x-y|=_ .38. 4a2n-an-(3an-2a2n) =_ .39若一个多项式加上 -3x2y+2x2-3xy-4 得 2x2y+3xy2-x2+2xy,则这个多项式为_ 40-5xm-xm-(-7xm)+(-3xm)=_41.当 a=-1,b=-2 时，a-(b-c)-b-(-c-a)_ .43当 a=-1,b=1,c=-1 时,-b-2(-5a)-(-3b+5c) _44-2(3x+z)-(-6x)+(-5y+3z)=_45-5an-an+1-(-7an+1)+(-3an) _463a-(2a-4b-6c)+3(-2c+2b)=_489a2+7a2-2a-(-a2+3a)=_50.当 2y-x=5 时,5(x-2y)2-3(-x+2y)-100=_ . (4x2-8x+5)-(x3+3x2-6x+2)72(0.3x3-x2y+xy2-y3)-(-0.5x3-x2y+0.3xy2)73 . -2a2b-3abc-(4ab2-a2b).74(5a2b+3a2b2-ab2)-(-2ab2+3a2b2+a2b)75(x2-2y2-z2)-(-y2+3x2-z2)+(5x2-y2+2z2)76(3a6-a4+2a5-4a3-1)-(2-a+a3-a5-a4)77(4a-2b-c)-5a-8b-2c-(a+b)78(2m-3n)-(3m-2n)+(5n+m)79(3a2-4ab-5b2)-(2b2-5a2+2ab)-(-6ab)80 xy-(2xy-3z)+(3xy-4z)81(-3x3+2x2-5x+1)-(5-6x-x2+x3)833x-(2x-4y-6x)+3(-2z+2y)84(-x2+4+3x4-x3)-(x2+2x-x4-5)85若 A=5a2-2ab+3b2,B=-2b2+3ab-a2, 计算 A+B86已知 A=3a2-5a-12,B=2a2+3a-4, 求 2(A-B) 87. 2m-3n+-4m-(3m-n) 885m2n+(-2m2n)+2mn2-(+m2n)89. 4(x-y+z)-2(x+y-z)-3(-x-y-z).90. 2(x2-2xy+y2-3)+(-x2+y2)-(x2+2xy+y2).92. 2(a2-ab-b2)-3(4a-2b)+2(7a2-4ab+b2).93.2x2- -3x-4x2-(3x2-x)+(x-x2).94: -(7x-y-2z)-4x-(x-y-z)-3x+z-x.95： (+3a)+(-5a)+(-7a)+(-31a)-(+4a)-(-8a).96： a3-(a2-a)+(a2-a+1)-(1-a4+a3).97. 4x-2(x-3)-3x-3(4-2x)+8.计算题参考答案：0-13/120-13.5-442-5-1-11/70(11)7.4(12)1(13)2.5(14)-163/12(15)-31/4(16)4(17)-19 .6(18)469.6(19)-4(20)-0.2(21)-9903(22)2(23)-19(24)-25(25)-25(26)- 4 .7(27)-121(28)75/2(29)78(30)9/28第一页(31)-1/117(32)4/27(33)- 0.5(34)3/20(35)-6 .5(36)1(37)- 27/4(38)- 0.8(39)- 85/84(40)-7.2(41)6(42)0.4(43)17/27(44)-622/63(45)25(46)9(47)-13.34(48)-2(49)31.3(50)-27/4(51)4(52)175(53)83(54)4 .7(55)3/50(56)14/3
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