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1、七年级数学题专项作业题学校名称 班级 学号 姓名27 18 +(7)3 2(-3 6)x(-)4 6 12(-+1-7 5)4-(-)8 3 24-42X|-2|3X(-4)2(4)3(-3 x)2义-2/3+(-5/9)0-I2-I 0.5-I 4-X -2-(-3)23 30一2二（一4尸一 1/8(3)3(5)3 4-(3)(5)_ 2+；+(-2)3 5+(7)x(5(-24)x(+，)+(-2)38 3 4-22-|-2|+(-2)2(-3)+(-4)-(+11)-(-1 9)2 1 4.-)x(-60)3 12 15-144-(-5)2IX(-|)+|0.8-1|i 7a2b-ab
2、1+ab2 a2b-2 a2b2 32 7 1-l-x(0.5 )4-1-3 3 97 5,9 4 4,118+(9)x(0.25)2 ZX-X(-32+62)X-9 6 4 9 9 626-17+(-6)-33-22+(-2)3 X 5-(-0.28)4-(-2)2(,7-3+7-TT)X (-12)o o 1.乙4X (-3)2+150 2 (-4)-2/4251-21-41-223-8+1-63-48 a b -4a -3 6a b +5(a b +a -b)-7a -2 1113(a)T 7)+J+3)l4 X(3)2+(6)-1-(2)2(3)2x(1)2g 2(7 P 5 X)(3
3、2+3)X(1 2(1P5X1)4 X(3)21 3+(2.25)+4X一6-13+2 3 6 4a i a-3 6 x(-)9 6 18-13-(1-0.5)X|X2-(-3)2-I2-|0.5-1|X -2-C-3)2-l44-(-5)2x(-j)+|0.8-l|-52-(-2 y+H-0.8 x|U(-22)x(-2)I100+(-2)-2)4-(-A10Y0Y)X O.3 8-(-4-)X (-4-)19 3 31-+-2.753 8X(_ 24)+-1-+-2.75|x3 8 J(_ 24)+(-四十邛136-7-)12+5-93-41-2-1-4X24101-22-2X11_73,
4、5 3 7、120(-5-+6-1-)(-2)2+18-(-3)X 2 +43 1 12 5 X-(-2 5)X-+2 5 X(-)4 2 41 2l-l-(z X-1)X (0.75)2+(0.5)3X 452乙 o1 2 11Z X 3 X (-)-1-X (-2)34 j j-52-(-2)3+H-0.8 x|L(-22)x(-2)1-+-2.753 8X(_24)+(-1)2003-|-2|3-32 x2+(2)2 x 3-4 x(-6)+(-3-52-(-2)3+H-0.8 x|U(-22)x(-2)10 0 4-(-2)2-(-2)1-+-2.753 8X(-24)+(-1)20
5、0 3-|-2|320 0 4-2-2+(-)2+20 0 32(7A/2+276)+(2 6-7 扬7 1 2-7 3 4-(2+73)ad 16 a-3-x/t?-2 J x V2-J(2-V 5)+y=-a+b+2ab-Ja+4b a4b+b4a(V24-3.2-2-1)-e-V22V6 2A/3-1-2V 2-V 6 3-273(V 3V2)(5+2 V6)V 12+-3-273(73+2)V3-11 3 1-2-X 2 4-(-2-)5 11 23 -8+(11)151(0.25)4(E。1。+8+(2)24)X(3)321-(5)3一X18-lT-(3)2-(3)2+i(2)3x(
6、七1+(105)XIHX2(3)2wx32X(.L)2+(2)52x 6 x 3x-2x2-4x+4(x2-2xy+y2)+2(3 x2-3 xy+y2)(2x2y)3 (-7xy2)4-14x4y3(x+2)*-(x+2)(x3)10 02-10 3 X 9 73 7 7 1(1-)x(+1-)4 8 12 7|-2|-22+(-3)3 x(-g)x(一 1)一(一 1严 3(f _y)(x _y)+(x+y)24X(-3)2+(-6)V6+1(3+V2)(2-V2),1 ,-22-(1-1X0.2)4-(-2)32x+7y+(4x-3y)-(2x-5y)(-2)2+18-(-3)X2-4-
7、3-(-3)-23-(-2)2+V0011x(-6)-f-0.5 U(-3)2(2xn-尸)3 (-xy)2n(为正整数)(a+b+ca-b-c)3a2x2 4+ax3-a2x-O.9izx3|-ax24 5 3 八 5(3 x+2X y-4)-3(y-2X j-3)3(m+1)2-5(m+lX加 一 l)+2(加一I)?23-17-(-7)+(-16)(-12)X(-5)+2+(4)3 1 125X-(-2 5)X-+2 5 X (-)4 2 423(2)=(4)可332义(152寸)+20 0 5+(-1)20 0 5+|-I20 0 5|3X(-32)+(-D4|x4-0.25x(-5)
8、x42+4HX4h-0-2 5)-2 4 +卜(一2丫 一 卜 目-10+8 4-(2产一(-4)X (-3)-X -32X (-)2+(-2)323(a+2b)(3a-7b)(16x2y3z+8x3y2z)4-8x2y2(-2 4)x(l-l +l)+(-2)38 3 40-32(-2)3-(-4)-4(3x2-2X+1)-(5-2X2-7X)1232-122x1242 3-1 7-(-7)+(-16)(-12)X(-5)+2 4-(4)5 4 8 713 11 13 1131112)x(-60)153X(-32)+(-1)4 (a-b)3s-2d)(11)+8 (14)3 4(-+)x(-
9、36)4 6 12I4-l-(l-0.5 x|)x65-(-7)+(-3)-23+|5-8|+24(-3)(2x)3 .(-2y3)+(16盯2)(2s+1)3(s“5+2)（一2/7（_|而3）十 _3 42反(0.25)9 (29)2-(-)20 0 5-(-2-)20 0 412 5、1 0 x (x+2)(x2)(XH)“x(2x-y-3)(2x-y+3)(2a+1)2-(2a+1)(2a-1)98X 102-992-1 4-1 42 4 8(-2)+gx(-3)-32X2-3X(-2)27 11 1 ,50-(-+-)x(-6)2 +(-7产9 12 6(-2)2+18-(-3)X2
10、-4-2 (3)+(8)5+2 x(3)+(12)+(2)|1-3|X(-12)-23J-I2002-(1+0.5)(-4)32(2X2-5X)-5(3x+5-2x2)3x-2(2+x)2 74(2x2-3 x+l)-1 0(-x2-x+2)5a2b-2ab2-3(ab2-a2b)7 o(-6 4)+2-+-4-(-9)(2x2 3 x+l)+(3 x2+5x7)20 0 42-2+(心20 0 32(4a 4b 2 6a 2b 3 +12a 3 b 2)+(2a b)x1Of,1 3 5-12x 1-F I 3 4 6(1+a b)(1 a+b)5a2b-2ab2-3(ab2-a2b)(2x
11、-3 y丫 一 (y+3 x 3 x-y)(x y)+(x+y)1(x2y2)19 823 9 X 9 1+156X 3 9-3 9 X 47(-28)+(14)+5+28 (_ i)20 0 5 _ f 2 _ l _|L 2 4 -|-32+5|-32 x(19 9 9-3 8 8 8)4-3-2+|-27|(2x3-xyz)-2(x3-j；3+xyz)+(xyz-2y3)l+-(0 .75)I x(-2)+(2-)2(B N 1)+(2)+(号)16 3 4 8 12 8 3(6八 一5。2。2)+(-3。2)9(x+2)(x2)(3x 2)2(2x-y)(4x2-y2)(2x+y)1
12、3 1 ,48 X(+)6 4 124义(-3)2+(-6)4-(-2)2(3月 X (-I)2002-(1-O.5 x l)x(3-4x)+2x2(x-1)-(-2x)3(a +h c)(+c-Q)+(Q c)(a c)(2m4-7t p)(2m n+p)(p q)4(q p)3 (pq)24(2)J 3=(1 4-n)11-13 +18i 7 3?9 +3+(-)X 1 22 3(-14)-14+(-5)-(-3 0)-(+2)3 2-I20 0 8-5义(-2)-(-4)2+(-8)-52X|-6.15|X()323 x(5)(3)+1164+(-2)3X5-(-0.28)-442+3Z
13、?2+2Z?-44Z2-4Z?2x+(2x2)(3%+5)(x-l，2x+3)16X 2,+(一；)0 4-(-1)O0-2x2xy+y2l-(-l-2x)2(2a+力 +l)(2o+1)(x-4y2x+3y)-(x+2yx-y)(-4)+1-8|+(3)3 -(3)Zl可44-(一 5)X|-3|3 3(-2)24-4-(-)2X 8 13(-21)-(-14)+(-16)+2136 0-4-(-6)2X 2-(-3)2(3Q-a1)-3(ab-3a2)2(-2)3-|(-5)3 I x(-)2-18-e-1-(-3)2|(-3X)3-(-2)2(2x+3y)2(2x 3y)220.25X(
14、-2)-4 4-(-)2+l+(-l)2005o2(2。-6。)一 4(3。+5 3。)(2x2 3 x+l)+(3 x2+5x7)20 0 4-2-2+(i)2+20 0 32(4a4b2-6 a2b3+12a3b2)-r(2a b)(1+a b)(1a+b)(8 x-7 y)(4x-6y)(5x-4)-3(3 x-5)-a-(2a+b)+2(a-2b)(9 x2-7 x +5)-(-9 x2-7x+5)a3 b+(ab 2c)2(a%c)一 4孙+3(g j-2x)(2x+a)2一(2xa)2T 一一3 +(-0.8+|+(-2)(-5)x(1)-,tn2 Imp2+(-7mp)(3X3)
15、2.(-X)(2a 3)(3 +1)3 1My小 门户3f(a 2 b-3c)(3c 2b+a)(2x+3-2(2x+3)(2x-3)+(2x-3)2A1 ,3 J /、-4 4-+2-+(-3)3 4 3 4-32X(-2)34-(-1)64-1X(-3)+3+(2)261 1 1 ,26-17 4-(-6)-3 3 (-+-)X (-6)2-15a?i-x -32X(-j )2+(-2)3 32+(-2-5)7-|-|x(-2)4Z+(-2Z )-x,+1-(-3 Z )-2x,+1 20 0 42-20 0 5 X 20 0 3(3%2-4/)+-(x2-2xy-y2)-(3%2-2 y
16、-/)9 8 X 10 2-9 922x-3z_3%_2（z_ y）_（x+8y-6z）2，-3彳+4/一（3/一切）3x2y-xyz-（2xyz-x,22z2+（力 -2005）-0.25X2*72，2 （-2加 九）（一 g m3n3）（-x3）2+（-x2）3-x-x5(-2a2b)-(a2b2-a2b+b3)5X(F +2x+1)-(2%+3)(x-5)(x+2)2-(x+l)(x-l)(x+2y+l)(x 2y+l)(-1)2OO5+*24+1-32+514 6 8U N得(-3)2-2 34-X331 3(1-+-)X(-4 8)6 4(1&+/?)(+)(2x y)2(x+2y)
17、(2 x)2(x+2)2(2x-y+l)(2x+y-l)（溶 一 工 加2）+（之加+/）4 2 2 3(5a 2 2ab)-2(3a2+4 a b-b2)(4 而 2+|(33)-1a223+(5 2+|(?)+5(?+；(2/-1+2a)3(a -1+1)2(研 -3(2/-3前 一 2 /-(2/-xy+/)(-1)-1+1+(n-1)0(x-2 y)-(y-3 x)23+3CI 5。-(?3)+2。+45-32X2-3X(-2)21302+3汩)x(36)4-(8)(3 a2+7a)(4a 3 a+1)(3 x2y x2y+xy)4-(xy)2220 0 5219 9 9 X 20 0
18、 1一(a +Z 7)+(2Q b)7(p3+p2P 1)2(p3+p)(27a3-1 5 a2+6 a)(3 a)(2x+y+l)(2x+y 1)(2x2y)2 (7xy2)4-(14xy3)(2x+3)(2x 3)(2x-l)28+(-)-5-(-0.2 5)4(-1)+(一弓)xg1 3 1(一 一 +-)x(T8)6 4 12,1-I3-(-X2)(W0.10 X0.52004 X22006 X(-1)-3(-1)20021x0 x(-3)I 2(7 6)X(1+(5)X(-)5274-(-2)2+(-4)-(-1)4(-2)X7214(2x2-xy)-(x2+xy-6)42X 1(一
19、 4尸+|2 I 3义(-i)32-r-|0.5-|4-1 X-2-(-3)23 3(5x 3y+2xy)(fix+4y 3xy)x2 y 3xy2+2yx2 y2x3(5m 6n)+2(3 加4n)5(a2b-2 a b 2+c)4(2c +3a2 b a b2)5+(6)+3+9+(4)(7)2 118 X (-1-)-(-2)4-1-3 3(0.25)1 X 410 2-23-(-l)2+|(-2)2|X (-1)20 0)-1 0 +8+(2)r (4)X (-3)3 ,-8-16x(-1)2 _(T)(一 3 a 23)2(_ a 3 6)5-7 x2y2.(-a x3y).(-?A
20、 y4)(3ab)(2a2b+ab-V)(6a/+2ab2-3ab+1)(-2 4-(-2)-12+15-|-7-8|(-3)X(-9)-(-5)63 4 12x（-i）2-9X371-22-37i-22X 4-4-(-4)+(-0-4)14-(-)(x2+2xy+y2)一 (x2 一孙+y2)9Q 2Q 2(Q 3Q)3-32-(-3)2+32 X(-l)20 0 61 1 1 3(-24)x(-+-)+(-2)38 3 426-17-(-6)-3 32(5x 3 y+2xy)-3 (6x+4y 3 xy)(-14)+(-7-5)-(-8-)-(-1 4)23x1 2+2xy-4y2(3xy
21、-4y2+3x2)1 533?-(-1-)+(-)+2-(-)-(+4-)2 6 4 8 3(-36)-(-28)+(+125)+(-4)-(+53)-(-40)4(x2-5x)-5(2x2+3x)4(X2-5X)-5(2X2+3X)-3?+584(x2 3y 2 +x-1)-3(x2+y2+x-6)(+2 3 41 4(-8)4-2-+-X (-1)4 92 3-)X (-12)12-22 4-11 X (1-)23 3-21-3 5+17(3)x(9)+8 x(5)15+5x(3)6 十(-7 3)-(-2 2)-1 7-(-3 8)-32-(-3)3+(-2)2-23-|-(-3)+0.
22、012(3)(9)2 32-+14-10+3-2 0 +10-5.4-4.65 51(-0.2)21+2-3-4+5+6 7 8+2001+2002-2(X)3-2(X)42.(一1 +2x0.4-O H+（一 吴 卜22小 一1/（畀（一(一g)2 一(一31+(3-$(一。)3-a-(-a)43a2 b+；ab2)一 加 +/人7(p3+p2-p-l)-2(p3+p)4x(123)+(5)x125 127x4-75x5(4a 2b)4/7 (2a+)-1 x-(2/cx-2*2)+(-2x +-1 y-2)-2+；+(-2)(-24)x(-+；)+(-2)3-12+11-8 (+-)x(-
23、60)-l20 0 2+(-3 xl)20 0 3-(-32)(-4)20OX(0.25)I99-(-6)2(3)2 X 2-5 X (8)4-(2)3(-12)+9-8 +4-(-2),1-I2-5-x 3-(-7)3 a+2b 5a b(a )b2 (b:)3 (2a+3 b)(6a 12b)_7+5_2_(9 6 18 )X (18)+9 5X 645X 0.4-32+lx (-4)24-2(|a2+4 a-2)-3(l-|a)6-1 5|-15 3(Sxy-Y+y 2)_ 4,_ y 2+2Xy _ 3)|V6-V2|+|V2 1|13 Vbj(3x2y+5xy2)-9 x2y-(.6
24、x2y+2xy2-I2x2y)899X901+1(+2x)+(-4y)-(-x)+(+3 y)(4x2y-5xy2)-(7x2y-4xy2)2(4x-0.5)-3(1 x)5 m?-m+(5m2-2tn)-2(m2-3 w)3 x2+2xy-4y2-(3 xy-4y2+3 x2)1232-122x118(-20 0 3)x 2+(3)-2+(_ 2尸(”3八 _6尤2y+32)-(-3 xy)（。+6 一。）（。-6+。）(2X)3 6/(工 3 +2厂 X)8 +(-)-|-5|-(-0.25)/+50 +2?x7 a2。+(-4a2/,+5ab)(4a2b-6ab2)4 2(-3)+(-4
25、)-(+11)-(-9)一/+1 x（-3）-12x H_l+i2-5 X(_ l)24-(-l)2V2-3V2IV2-V3I+2V 2V3|V s|12+(-18)+(-28)+10(-5.5)+(-3.2)-(-2.5)-82 _4 孙 2 _ 5 K y 2 H Aa3-ce+(-2/+(/(9/+8 _3。2+3+6，“卜 3,2I(x+2)2-(x-1X+1)(a+b+c+d)(a+b-c-d)(4x2+2x+U“-2 x +1如2-1)(tz 2Z?)(a?2ab+4b)/-户(_-)3前2尸8*4 +212X5/Z44-(-3x2y3z)-2x3y3(i+y+zx+y-z)3(_
26、q+0(_Q T)_2(a+l)2(-x2)-3X2(X4+2x-2)(2 +Z?)2-(-2 a-/?)2(-8)x(-55)x(-0.02)8-2 3+(-4)3810 0-5-(2)(2)(xy+l)(-xy+l)(x2y2+1)3 x+5x 7x+10 x5x(2x 5)(2x 6)-3 (x 2)2(3 x 5)1 1 3(x-4)(x+6)+x-34 2 4式“+）z（“T ）Q q+v)。+q v)J 式彳T ）一式彳+MI000IXI0TX66（卢 什 巴 十）.z（咨(/-)4*(,X S P I)一 域(1一)X(+z )(S-)4-(9-)+2(E-)X f8 X(1)-
27、5-(-0.25)-3-5 0 4-(-5)-14X(-3)2+(-6)4-(-2)5xy2-2xy+3xy2-4xy2+2xy3ct-2。+4/7。3Q+4 -(a 3/?)(-3)-卜 9|178+(2)+4x(3)1 3 1(+)X(48)6 4 12-32(|)2 x|+(1 严(x-2y)(x-y)(x2+3xy+2y2)1 52.5-4-+4.25 2嚓4-14-l2-(-3)223(-4)3+|0.8-1|X(21)2(_6)-(-3)3a+2b5ab(8)I(+1)0(52)I(+42)I(113)(53)+(+21)(79)(+37)3(2XIAy)+4(x+16)075)I
28、(+5)I(3)QKh)+(卜)+(!1+y2(x-l)(2x+3)1-(1 2x产(2a+b+1)(2Q+b-1)59玛+*(-36)(-1)2+120 _(-2)3 +1)(-5卜 针(-7乂+卦1 2+会)-2、2(g 孙+y2(x-1 2x+3)l-(-l-2x)2(2a+Z?+1 )(2a+/?-l)8+(-)-5-(-0.25)45 3 2 11 4-10 +8-(-2)2-(-4)x(-3)(_1)2O O3_(3_1_3)X244 3 2+57a2b+(-4a2 b+5ab2)-a2b-6ab2)5 (-4)+(2)-(2x+y-3)-3(4%+y)3(3 xy _ xy+3)
29、_ 2(2x y+xy _ 2)1 2 2 2X y3X yZ(x+2y)(3a-4。)(-x)2 x3 (-2y)3+(2孙 (-x)3-y3/(-3孙-x2-(x2y2-2x)3 1 24砂 -x y-3(x y-x y)4 2(x-2)(y2-6 y+9)-2(y2+2 y-15)(-吴1 1 3(+l-)x(+2-)x(-3-)2(x-4)(3%+2)-5(3%+7)(x+1)(_ 4)2 X (-2)+(-2 p -(-4)(1.2-3.7)2X(-1 产 +(J x 0.5-I20+23+(-2)3+(-4)x(-3)12xf-3-+l1|+(-3)3-22x1(一a a2/?3c
30、1 3)-4-X2 4-X+X34-(X)2 (-X2)mn-4mn43x2-7x-(4x-3)-2x2 J(2 xy-y)-(-y+yx)5(nZ 3 ab-)2(nZ?7 uh)-x0.125x(-8)x(-12)3 4 149 x(-5)253 4(0.7-+0.03)x(-100)22 22 22-7 x(一-)+19x(一-)-3 x(一-)(-53)+(+21)-(69)-(+37)(-5 1)x(+l1)x(-2 1)1I -5 I x(-)x 4-1 21 v 67 11 43 6呜3+专33X(-2)2-(-3)3X(-2)3l-(l-0.5xl)x2-(-3)2 2-+(-
31、2)2-x(9)-l3-(l-0.5)xl x 2-(-3)23 a 2 5a-(a -3)+2a221+2(-24-y)4-(-6)工+2二）十（一421 14 7 42-24+(-2)41,14-2X-+302223 2-3 +(-5+|-4|)x(-)H-4-1 3 o 1U-)(3X+)(2X24-)(3。反)3 4.(1/).(2 加 c)(a +3)(67+9)(a 3)x(-O.6)20 0 23(2X3 X 2X+3 1(3 X+4X 3 X12)121(18)+(7)15-3-2 +)x(48)6 412(x3y)I(yI2x)2 2 2+3 x(1 1)3 1(-4)3X
32、217 X(4X13)12x23+(-3)+(-7)+3-2 7 +18-0.73 +21 3 7(1-1-+)X (24)2 8 12(-5.5)+(-3.2)-(-2.5)-81-7-(-9)23l o一 2-(-3)+(8)4 X (-3)2+(-6)bo23772+卜L)X(60)4126I(IIX0,2)-1-(2)186-I-(2)X-一799X(9)184T5+(。-2X11)+(12)11)223+()2。广1。X(2)土357+5127+13104丁54|I(+5)X(2)21+(3)(彳 一)x _)+_ (y-)-+目(g -8 1-)-(9 *8 1+)r()广 +阳(
33、+9 1/_曾。卜 一【一 广 C O T)x,一xz c x 一)(z-8-l-9-6-)、X9-I I I1 1 1 a(-24)x(-+-)+(-2)38 3 4(5m+n)-7(a-3b)(-4)3X(4)-30.(-11)-3(2x2-xy)+4(x2+xy-6)(-8.37)-(-2.43)13 1(-5.4)-(+6)-1-20 42 2 3(-)-(-)-(+-)3 3 413441 3 I(-5.5)-(+3-)-(+7-)-(-8-)4 4 2T-3-5-7-9-9 7-9 93.1416x 6.49 55+3.1416x(-5.49 55)z1 1 1 、八 1 1 、(
34、一+,+-)(1+-)-2 3 20 0 4 2 20 0 3(1+.!)(+-+!_ _)2 20 0 4 2 3 20 0 31 3 7-31 2-(1-1X2)+(-2)5(1-1-+)X (24)2 8 12+丫 +产；+Y*-町（处+W Z-Z叽 依+”）1Tlic&卜 I（l+产/丫,-【）-咛（丫 一 闾 6【用0.0*附I V Z（工+e）?（1+”）z（1）（S+x）（1+x）-（g-x）（g+x）2(一3 y x ,l)+2乂 一|(5+-2-)3x(-1 2)12 3 4(-3)2-43 X3+(-834)X-(13-18)6呜XE+T41-81-41-2+-32 x2-
35、3x(-2)27 1 1 1 ,50 x(-6)2 4-(-7)29 12 6(4)+(+6)(+1)(3)(-12)4-4 X(-6)4-2-1-l-x 0.5 x l x 2-(-3)2-+1x18-1.45 x 6+3.95 x69 6 18)(-4)2 x(一2)十(-2)3-(-4)J(1.2-3.7)2x(-l)2005-rf-!-l x0.5(2x+y-3)-3(4x+y)3x2-(x2+y2)-y25(2x 7y)3(4x lOy)-(a2-h)+-(a-h2)+-(a2+h2)2 3 612-(-18)+(-7)-1542+(-2)2-(-5)x(-2)-14 一)x(2(3
36、)2-22+(-2)3X 5-(-0.28)+(-2)222.54+(-4 )+(-12.54)-5|(-2)3-13+-36x4 _ 5+39-6 +4(7y-3 x)-(8y-5x)-14-(1-0.5)X1X2-(-32)-72+2X(-3)2+(-6)-(-3)2(7x-4-3 2x)+(-4 6x 2 r)x2y-2xy+y2)-3xy(x 2)(x+2)(x+l)(x 3)(一孙 2Z3)2.(T2 y)3(-x)7 +(_ g x)a1 b-QAab-a1 b+ab4 2 56+10 3+1 9|1-x0.22-(-l +2-)+2.52 4-I100-(1-0.5)x g x
37、13 (3尸(-5)x(-31)+(-1 9)x31-7 x(-3 1)(52一382)+5。2 _2ab-2b2)-2(a2-2ab-b2)-2a2-2ab-4b2)(+3.5)-1.4-(+2.5)+(-4.6)g x (-7)+(_ g)x75)3x 2”中,3 7 5 1、，c,、(_+-_-)x(-24)4 12 8 241 8-(-2 6)-|-3 5|+()2(-3)2 x R +(-1)-6 (-2)x(-l)(2a2+15a&-20)-(16a2-3 5.6+67)-22+(-2)X S(0.28)+(2)22(3a-5)+52x(3x 1)2 3 6 43 1 3T 厂+(
38、-5)X(-3)-3 6 x(-i-)9 6 18-13-(1-O.5)X|X 2-(-3)26(a2+2a+a)(2 X+X)4X 2(3 X 2 X)(4Y I1T3Q+5)(Ja 2b)2.(9 a b 3+)(I-a 4b 2)(1-)2004(H)2 3 5(r 2 b)3(9 a b 3)中(L ab)145321 1 X2(1 3)26-(2x+y-3)-3(4x+y)5x2-x2+(5X2-2X)-2(X2-3X)1+-(-)2 x(-2)+(2-)216 43.(-4机/z)(x-2才 一 (x+2y)2 k(-8孙)(2x 3)(x 2)2(x 1)210 0 +(2)(-
39、2)1；+*_2.75卜(一24)+(-1广 一2|3(-5)5(.-a)2(a+b+c)(a b+c)5x(2-3x+4)20042-2005x2003+7+(3)(5),1 1,3、，、(7-T+T)x(60)乙 O(-1)3X 5 -32+(-2)2(x+2x+l)(x l)(x+1)+(x+1)15-1-(-20+4)1-23 4-x(-)2 x(-l)49 3-2-(-2.5)+1-1-2-2 2-23+|5-8|+244-(-3)25X(-1/2)2-(-25)X 1/5+25X3/41-3+5-7+97-99(1)2002 0 x(3)4-6 +(-2)x(-xy+2x)-2(3
40、x-y)-13-(1-0.5)X1X2-(-3)23(x+1)5(x+l)(x 1)2x(x 1)c 1“r2 x+-x+4-75_(2y _ 5)+(4+3 y);-22-(-2)2X0.254-13X2-7X-(4X-3)-2X2(TxTzxzg-0.0*一xe、/r、/、9316,“z干TL(9x-l+=!ZT0E2x(2l)exRodx(寸)x汽-bx8X(000-1)x(530):r、/、寸98,川1slT)XC9xa1)x(3-I+E)飞-nlrL、c，、寸,(9I.0lIlg)x(ll1 g +(-口25)+2 士 (-3.25)x(-l-5)-l)20 0 02(2a2+9切+
41、3(-50 2_ 40(-2+18-(-3)x2+4792315-6-(-2)2-3X(-2)+3-81-6+3-83-4X4/(T A -23 V x2a-3b-4a+b3(2ab-b)-2 (-3ab+2a)-2 1+(-7)+5-1 3-(-3 5)1 ,1 1 ,6-3 0+54+37-54+1 2748X(-1+)4 36 6 12I?8)Ff)12-(3-10)X4 4-4(-7)+(+10)+(-1)+(-2)-3 6 x(1-)-324-(-3)2+3*(-6)9 6 181 4(-3.17)+(T.57)-(-6.17)(+5.43)-(+2.14)(81)+2x +(16)
42、4 9-32-(-3)2X(-2)-(-2)X(-1)2(-2)2(-l)+|-22-3|-|-33-(x+5)(x-5)-(x+1)(x+5)(a )2(a2+)2(a+)2 4 211-13+18 12x(-)4 3 2一-x(6)-+Vs 2x _ 3x 1 +4x 3x6 3 31 3 1 32-(-+T-)X24 4-5X(-I)2001 33 24(2)3 (-4)Z o b 48ab-4a_36ab+5(ab+a-b)-7a-2 x-3x-2(l+2x)-40-28-(-19)+(-24)(一 6 0)x(%|)234-(-2)3-(-4)-62 x(l-1)2+(-3)3 一1
43、)2-X-32X42-2(-1)2006lx2y+(-4x2y+5xy2)-(4x2y-6xy2)V is V 6 (结果精确到0.1)2 (l)s x23m2n 2 2-n-nrn52(x l)-3 (2-3 x)3mn4mn+nm27a+b 2a+b32Q+2(Q 5)3x 7x (4x 3)2x J(_81)W X 1 6)(I)X 3 -2X卜 讯 闻-4X(2-3 1)-4xy+3(l xy-2x)|-14|+|-16|+|+2(|-12|x-21-|-25|3-3X(-3)2+(-1)2006(-3 2)-(-27)-(+72)-8 752+(5)2(I)3 x()4-|1|-22
44、-(1-x0.2)-s-(-2)2(3)+(+7.5)+(-5.4)-(+4.6)-(-2.5)a3b+g 3 b _ 2 c)_ 2(a3b-c)-32+(-3)-2-(-V13)0-|x(-3)2 x(1)2-235 -(2)3+x 6；)x(4?a2b ab2+-ab2 a2h 2a2b27-18 +(-7)-3 2(-3 6”(|出一 213+6(一 D i V 尸(a+b)2(a-b)20.2524-(1)4X (2)3+(1+21-28 375X 24(-x+4X-x-4j)(x+2y-3zx-2 y+3z)(-/+用(2a+b4a2-lab+b2)-b(2a-b f104X96(
45、-79.8)2(-1 )2004+(-1 )-2-(1 4-n)(4j-l X y+5)(-2帅)(3a 2-2时-40 2)(a-b-c)2(2a+b+3)(2a+b一3)(-48)X(4 4常）|+3|+|-2|-|-4|T2|x-2 -|-25|-I1-(-2)3X5+(-3)2+(-0.1)(一22)+卜 一3|x(-l)2(X)5(-1)2008+(-3)2X|-1|-(-4)3-(-2)5o-V2(V2-2)A/5(V5(2x+3)(3x-2)一 产+2y 2y+?1,22-18+6+7-5-22 x 2-3x(-l)37 5X 25(b-2a+3)(b-2a-5)(-3/)子 加
46、.(2根 3 )2+8(x+2y)(x-2y)L(x-2y)2-(x+2y)2J*2 份（_令 _+2）_（；_ 42+2/-I2-5-1-4-()+211(-2)2 X|3-7|(1-1)X3 6-(-3)2(-0.25)-1 X (-25)+(-1-5)X (-1)2映2138 a x2a y l2-(-l)2+|-l|-23-(-2)3X(-)34-(-)32 2m (7m-4n)+(5n-13 m)-16(mn2)*(3 )2 m2n3I 4-9m5n1-3-4 +19-14+27 7 o 7 7 7a-3dh+ab +?ba+ab3 a+2b 2(a b)2 3 1-2 1-+3-0
47、.253 4 3-22+2X(-3)2-34(-12X4J3)+(2/.(-3 xy)(3 4y)(4y+3)+(3 4y)2-22-(-3)3X(-1)4-(-1)58+(-3)2X(-2)4(-8 1)+2上 X(-)4-(-1 6)493-2x(-5)2*I呆|+4)2x0.X(-6)3X242 x4 n-x2 n (0.2 4 xn)3 xy 2 x4+7xJy(-x3)-(-x2y)xJ(2 x2-小x-4)-(x+3)(x-4)(6 a l 7aJ+3 6 a,)-r-3 a2+2 a (a2+a-6)2(-xny)3 (-0.5 xny2)3+0.75(x2,y3)3(3 72
48、+2 73)-3 73(V 3-2)X2A/330.75 x3.6 6 x2.6 64Smn-布%-(5nm2+mn-nm2-13mn22 X(2)+(-3)(-1 5)4-5-(-3)X (-2)x(-6 0)3 1 2 1 5l-0.5 x|x(2-(-3)2(、3-184-(-3)2+5X|-I-(-15)-5-14+X 3 62 3 4-99 X 3 41 72 x+(5 x-3 y)-2(3 x+y)a“-2 a 1-(2 a2-b)(-1 0 0)-5X(-4)V 1 5-V 6 （结果精确到0.1）.3 Tx（T-2 X-产 9吗X36（用简便方法）2 a 2+口6(2 x-7
49、X%-1)-(2 x-3)(2 x+3)a 2 3 a 2acr-6 a+9,9-a2(a b)(a+/7)+(一 c)(b+c)+(c a)(c+a)|-2 8|+|4 4|I-3 8H I-2 4 I2|-1|一|3：|+|-5|-3.5 1+|6.5|+5 1-Ml+1-1 0 1+1 0 5-0.75 1-32X (-1 )+(-2)=23 6 X(11 -11)92-42+5x15?(可2/3+T7/(-1 1)-9-)3 2+5-|-71 5 1+3 5+2 2 5 5 33 1 1(+1 7-)-(+25)-(-8-)+(-0.75)-(+2 2-)4 2 4(-1)2005 4
50、-1X(1-22)+3-23-3-l l(l l.6)l(-l d)l l)5a+(4a-3b)-(a-2b)-32X2-3X(-2)2-1+-+-(-2)4-X(-3)2 4 8 35 0-(：一 萼+：)x(6)2 +(7)2 -3；(-9)x-3 x-|-1 5|+(-2)49 1 2 o 1 3)()x(l g)X 2；)-5.2 5 +2.2-1.2-1-(-0.75)534高)(/-3.1-)、x(3-73-)、4-o3 1-X 217 7 3 7 22(-3)3(-9)+(-2)2X|-4 +1|3x y2z+5x-4y+z1|T+(等 x(-6+(_1)_ 33 1 (-l)z