1、(完整word)有理数加减乘除及整加减混合计算题 有理数计算题1、38+(22)+(+62)+(78) 2、()+0+(+)+()+() 3、(23)+|63|+37|+(77) 4、(-8.25)+8。25+(0.25)+(5.75)+(-7。5) 5、(+18)+(32)+(-16)+(+26) 6 、5+(5)+4+()7、(8)+(3)+2+()+12 8、(0。8)+(1.2)+(0。6)+(2.4) 9、(6。37)+(3)+6。37+2.75 10、(+)()() 11、(+6。1)(4。3)(2.1)5。1 12、()(1)(1)(+1.75)13(3)(2)(1)(1。75)
2、 14 8543 15 4+() 16(0。5)(3)6.755 17 2-(+10)+(-8)-(+3) 18598-8419(0。25)()4(7) 20()()() 21) -8721+531279+43 (22)4(96)(0.25) (23)(1+)56 (24) ()36(25)(36)() (26)()(80。4)(27)(66)1()() (28)25(25)25 (29)(+)72 (30)(2)()()(31)2(518) (32)1(3)()(33) ()() (34)()()(35)(+)() (36) 3。5 (0.5) (37) 1(1)1(7) (38)() (3
3、9)(2)4 (40)0.8+4。8()2.2+0。8(41)()(154) (42)(2.4) (43)2()(5) (44)15 (113(1) (45)(5)()5 (46)( +)()(47)-13-0。34+(13)0。34 (48)(13)(134)(-) (49)(1650+3)( 2) (50)( 4)-(5)+( 4) 3 (51)(-0。5)-( 3)+6.75 - 5 (52)178- 87.21+43+5312。79 (53)()1+() (54)3|10(15) (55) 1()2 (56)(23+1)(1)(7)(57) 33(5)+16(2)345|+(0。625
4、)2(58) (5)(5)(5) (59) (4)()()()3(60)1(3)33+(1)(2)3ab-4ab+8ab7ab+ab=_47x(5x-5y)-y=_523a3bc2-15ab2c+8abc24a3bc2-8abc=_6-7x2+6x+13x2-4x-5x2=_72y+(-2y+5)(3y+2)_11(2x23xy+4y2)+(x2+2xy-3y2)=_122a-(3a-2b+2)+(3a4b1)=_136x2-7x2+15x2-2x2_142x(x+3y)(x-y)-(xy)_162x+2y3x-2(xy)=_175(1x)1-(x-1)=_18( )+(4xy+7x2-y2)
5、=10x2-xy19(4xy2-2x2y)-( )=x3-2x2y+4xy2+y321已知A=x3-2x2+x4,B=2x35x+3,计算A+B=_22已知A=x32x2+x4,B=2x3-5x+3,计算AB=_23若a=0。2,b=0.5,代数式-(|a2bab2)的值为_25一个多项式减去3m4-m32m+5得2m43m3-2m21,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)-(2y23y3+y47)_29化简代数式4x27x2-5x-3(12x+x2)的结果是_302a-
6、b2+c-d3=2a+( )-d3=2a-d3-( )=c( )313a-(2a-3b)+3(a2b)b=_32化简代数式xy-2x(x+y)等于_335a2+( )a-7+( )a2-4a+( )=a2+2a+1343xy(2x+y)=_35化简1-x+y|x-y|(其中x0,y0)等于_36已知xy,x+y-|x-y=_37已知x0,y0,化简|x+y5-xy|=_384a2n-an(3an2a2n)_39若一个多项式加上3x2y+2x23xy4得2x2y+3xy2-x2+2xy,则这个多项式为_405xmxm(7xm)+(3xm)=_41当a=1,b=2时,a-(bc)-b(c-a)_4
7、3当a=1,b=1,c=1时,b2(-5a)-(3b+5c)_44-2(3x+z)(6x)+(-5y+3z)=_455an-an+1-(-7an+1)+(-3an)_463a(2a-4b6c)+3(-2c+2b)=_489a2+7a22a-(a2+3a)=_50当2y-x=5时,5(x-2y)2-3(-x+2y)100=_(4x28x+5)(x3+3x26x+2)72(0.3x3x2y+xy2-y3)-(-0。5x3-x2y+0。3xy2)73-2a2b-3abc(4ab2a2b)74(5a2b+3a2b2-ab2)(2ab2+3a2b2+a2b)75(x22y2z2)-(-y2+3x2-z2
8、)+(5x2-y2+2z2)76(3a6a4+2a5-4a31)(2-a+a3-a5a4)77(4a2b-c)5a8b2c-(a+b)78(2m3n)-(3m2n)+(5n+m)79(3a2-4ab5b2)(2b2-5a2+2ab)(-6ab)80xy-(2xy3z)+(3xy4z)81(-3x3+2x25x+1)(5-6xx2+x3)833x(2x4y-6x)+3(2z+2y)84(-x2+4+3x4x3)(x2+2xx45)85若A=5a22ab+3b2,B=2b2+3ab-a2,计算A+B86已知A=3a2-5a12,B=2a2+3a-4,求2(AB)872m-3n+-4m(3mn)88
9、5m2n+(2m2n)+2mn2(+m2n)894(xy+z)-2(x+y-z)-3(xy-z)902(x22xy+y2-3)+(-x2+y2)-(x2+2xy+y2)922(a2-abb2)3(4a2b)+2(7a24ab+b2)93。2x2-3x-4x2(3x2-x)+(x-x2)94:(7x-y-2z)4x-(x-y-z)-3x+zx95:(+3a)+(5a)+(-7a)+(-31a)(+4a)-(8a)96:a3-(a2a)+(a2-a+1)-(1a4+a3)974x2(x-3)3x3(4-2x)+8计算题参考答案:0 13/12 0 -13.5 4 4 2 -5 -1 11/70 7
10、。4 1 2。5 163/12 31/4 4 19 .6 469.6 -4 -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 6
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