初中数学计算题道.docx

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1、初中数学计算题(200道)(-1.5) X(-9)- 12+(-4)56+(-7)- 2+5+0.43.57 X 29+ (-4)5.6 + (-2.8)-(-50)+29.6+(- 7.3) X ( -5)-(-7)12.3 + 5.6+( -1.2)(-75.6) -(1/4+1/5)9.5 X (-9.5) +1/295.77 + (-2)+(-34.6)(-51.88) +2-(- 5) X241.25* (-3) +70* (-5) +5* (-3) +259999*3+101*11*(101-92)(23/4-3/4)*(3*6+2)3/7 X 49/9 - 4/38/9 X 15

2、/36 + 1/2712X 5/6 -2/9X38 5/4 + 1/46 + 3/83/8 +64/7 X 5/9 + 3/7 X 5/95/2 - ( 3/2 + 4/5)7/8 +( 1/8 + 1/9)9 义 5/6 + 5/63/4 X 8/9 - 1/37 义 5/49 + 3/146 义(1/2 + 2/3)8 X 4/5 + 8 义 11/531 义 5/6 - 5/69/7 -( 2/7 - 10/21 )5/9 义 18 - 14 X 2/74/5 义 25/16 + 2/3 义 3/414 义 8/7 - 5/6 义 12/1517/32 - 3/4 X 9/243 X 2

3、/9 + 1/35/7 义 3/25 + 3/73/14 X 2/3 + 1/61/5 义 2/3 + 5/69/22 + 1/11+ 1/25/3 X 11/5 + 4/345 X 2/3 + 1/3 X 157/19 + 12/19 X 5/61/4 + 3/4+ 2/38/7 X 21/16 + 1/2101 义 1/5 - 1/5 义 2150+160+40120-144+ 18+35347+45X 2-4160- 5237 X (58+37) + ( 64-9 X5)95 + (64-45)178-145+5 X 6+42812-700 + (9+31X11)85+14X (14+2

4、08+ 26)120-36 X 4+18+35(58+37) + (64-9X5)(6.8- 6.8 X 0.55) +8.50.12 X 4.8 +0.12 X4.8(3.2 X1.5+2.5 )+1.66-1.6+4= 5.38+7.85 -5.37=7.2 + 0.8 -1.2 X 5= 6-1.19X3 -0.43=6.5 X (4.8-1.2 X4)=5.8 X (3.87-0.13 ) +4.2X3.7432.52- (6+9.728 + 3.2) X 2.5(7.1-5.6 ) X 0.9-1.15+2.55.4 + 2.6 X (3.7-2.9 ) +0.6212X6+ (12

5、-7.2 ) -612X6+ 7.2 -60.68 X 1.9+0.32 X1.958+370) + ( 64-45)420+580-64X21 - 28136+6X (65-345 + 23)15-10.75 X0.4 -5.718.1 + (3-0.299 +0.23) 乂 1(6.8- 6.8 X 0.55) +8.50.12 义 4.8 +0.12 X4.8(3.2 X1.5+2.5 )+1.63.2 X6+ (1.5+2.5 )+1.60.68 X 1.9+0.32 X1. 910.15- 10.75 X 0.4 -5.75.8 X (3.87-0.13 ) +4.2X3.7432.

6、52- (6+9.728 + 3.2) X 2.5(7.1-5.6 ) X 0.9-1.15+2.55.4 + 2.6 X (3.7-2.9 ) +0.6212X6+ (12-7.2 ) -612X6+ 7.2 -633.02 - (148.4-90.85) +2.576.(25%-695%-12%)*3677./4*3/5+3/4*2/578.1-1/4+8/9/7/979.+1/6/3/24+2/2180./15*3/581.3/4/9/10-1/682./3+1/2)/5/6-1/3/1/783./5+3/5/2+3/484.(2-2/3/1/2)*2/5 85.+5268.32-256

7、986.3+456-52*887.5%+632588./2+1/3+1/489+456-785%+. 3/7 X 49/9 - 4/39 X 15/36 + 1/272X 5/6 -2/9X33 5/4 + 1/494+ 3/8 -3/8+695/7 义 5/9 + 3/7 义 5/96/2 - ( 3/2 + 4/5)8 + ( 1/8 + 1/9)8 义 5/6 + 5/61/4 X 8/9 - 1/310 义 5/49 + 3/141.5 X ( 1/2 + 2/3)2/9 义 4/5 + 8 义 11/53.1 X 5/6 5/64/7 -( 2/7 - 10/21 )19 x 181

8、4 X 2/75 X 25/16 + 2/3 X 3/44 X 8/7 - 5/6 义 12/157/32 - 3/4 X 9/242/3 + 1/2 1/4 X 2/52-6/13 -9/26 2/32/9 + 1/2 +4/5 +3/810 + 5/9 + 1/6 X41/2 X 2/5 +9/10- 9/205/9 X3/10+ 2/7 + 2/51/2 + 1/4 X 4/5 - 1/83/4 又 5/7 义 4/3 1/223-8/9 X 1/27 +1/278X5/6 +2/5+41/2 +3/4 X 5/12 X 4/58/9 X 3/4 3/8 + 3/45/8 + 5/4 +

9、 3/23 + 9/111.2 X2.5+0.8 X2.58.9 X 1.25-0.9 X1.2512.5 X 7.4 X 0.89.9 X 6.4- (2.5+0.24)(27) 6.5 X9.5+6.5 X 0.50.35 X 1.6+0.35 X3.40.25 8.6 46.72-3.28-1.720.45+6.37+4.555.4+6.9 X3- (25-2.5 )2 41846-620-3804.8 46+4.8 540.8+0.82.51.25 X3.6 X8X2.5 -12.5 X2.428X12.5-12.5 X2023.65- (3.07+3.65 )(4+0.4 X0.25

10、) 8X7X1.251.65 99+1.6527.85- (7.85+3.4 )48 1.25+50 1.25 0.2 87.8 9.9+0.78(1010+309+4+681+6)X 123X9146X 782X 6X8545.15 X7/8+6.1 -0.606253/7 X 49/9 - 4/38/915/36 + 1/2712X 5/6 -2/9X38 5/4 + 1 /46+ 3/8 -3/8+64/75/9 + 3/75/95/2 - ( 3/2 + 4/5)7/8 +( 1/8 + 1/9)9 . 9 X 5/6 + 5/63/4 X 8/9 - 1/37 义 5/49 + 3/

11、146 义(1/2 + 2/3)8 X 4/5 + 8 义 11/531 义 5/6 - 5/69/7 -( 2/7 - 10/21 )5/9 X 1814 X 2/7178-145+ 5 X 6+42 420+580 - 64 X 21 - 2814 X 8/7 - 5/6 X 12/1517/32 - 3/4 X 9/243 X 2/9 + 1/35/7 义 3/25 + 3/73/14 X 2/3 + 1/61/5 X 2/3 + 5/69/22 + 1/11+ 1/25/3 义 11/5 + 4/345 义 2/3 + 1/3 义 157/19 + 12/19 X 5/61/4 + 3

12、/4+ 2/38/7 X 21/16 + 1/2101 义 1/5 - 1/5 义 2150+160+40 (58+370) + (64-45)120-144+ 18+35347+45X 2-4160- 52(58+37) + (64-9X5) 95 + (64-45)812-700 + (9+31X11)(136+64) X (65-345 + 23)85+14X (14+208+ 26)(284+16) X (512-8208 + 18)120-36 X 4+18+35(58+37) + (64-9X5)(6.8- 6.8 X 0.55) +8.50.12 义 4.8 +0.12 X4.8

13、(3.2 X1.5+2.5 ) +1.6 (2) 3.2 X (1.5+2.5) +1.66-1.6+45.38+7.85-5.377.2+0.8-1.2X56-1.19X3-0.4347.6.5 义(4.8-1.2 X 4)0.68 X 1.9+0.32 X1.949.5.8 义(3.87-0.13 ) +4.2X3.74+ 3.2) X2.551. (7.1-5.6 ) X 0.9-1.15+2.5 52.5.4 + 2.6 义(3.7-2.9 ) +0.62(247+18) X27+ 25102X (-4.5)-(- 3)X(-5) +27.8 X 6.9 +2.2 X6.9(-2)+2

14、-(- 52)X(-1) X 5+87+ (-3)X(-1)5.6 X 0.258 义(20-1.25)(-7.1) X(-3) X(-5)+2-2.5 X (-4.8) X (0.09) +(-0.27)127+352+73+44X(-2)89X276+(-135)-3325X71+75- 29 -88+(-2)243+89+111+579405-2940- 28X21920-1680+ 40+7690+47X 52-398148+3328+ 64-75360X24+32+7302100- 94+48X 5451+ (2304-2042) X 23 4215+ (4361-716) +813

15、6-720 + (360+18)1080+ (63-54) X80(528+912) X 5-61788528- 41 X 38-904264+318-8280- 69(174+209) X 26-(9000A0)814- (278+322) + 151406+735X 9+453168- 7828+ 38+504796-5040 + (630+7)285+ (3000-372) +361+5/6-19/123x(-9)+7x(-9)(-54)x1/6x(-1/3)+ 0.23) X 12.(6.8- 6.8 X 0.55) +8.53.2 X1.5+2.5 +(-1.6)(-2) X 3.2

16、 X ( 1.5+2.5 )+1.65.6-1 .6+4+(6.8-9)5.38+7.85- 5.37+896-1.19X3-0.437.6.5 义(4.8-1.2 X4)0.68 X 1.9+0.32 X1.99.5.8 X (3.87-0.13 )(-8.01)+4.2 X3.74+ 3.2) X2.511. (7.1-5.6 ) X 0.9-1.15+2.512.5.4 + 2.6 X (3.7-2.9 ) +0.6213.12 X6+ (12-7.2 ) -614.12 X6+ 7.2 -6+ 2.5(-5)-252 X (-78)(-6) X (-2)+3 + (5+50)7-7+3

17、-6- (-90)(-8)(- 3) X (-8)X25(7+13) +(-616)+ (-28)(8+14-100-27) +4(-15) +(-1)- 101-1016+0.21 X (-8) X(4.1+5.9)(-10) X(-2) X4+ -9+ 6+( -5.67)(-18)(- 4)2 X 8.01 X(-3.14)9-32-890- 79+8.1 X 9(-20)-23+(- 9) X 9.42(-24)3.4 X 104+ (-5) X2 00.96-|98|+76+(-87)*2356+(-75)-(7)-(8+4+3)5+21*8/2-6-5968/21-8-11*8+6

18、1-2/9-7/9-564.6-(-3/4+1.6-4-3/4)1/2+3+5/6-7/122/3-4-1/4*(-0.4)/1/3+222+(-4)+(-2)+4*3-2*8-8*1/2+8/1/8(2/3+1/2)/(-1/12)*(-12)(-28)/(-6+4)+(-1) +V9 2/(-2)+0/7-(-8)*(-2)18-6/(-3)*(-2) X 2A7(5+3/8*8/30/(-2)-，36(-84)/2*(-3)/(-6)1/2*(-4/15)31+2+3+4+.+1000001/1+1/2+1/3+.1/501+1/2+1/4+1/8+1/16+.1/5123+9+27+8

19、1+243+.99991+1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90 8 2X32(-2 X3)2-12 X (-3)2 -(-1/2)2003 X (-2)2002 +2/9 (0.5-3/2) +3/1 X -2-(-3)3 I 1/8-0.52 I-38-(-1)7+(-3)8 X-53aA3-2bA3+ab(2a-b)- Va-bA215*(-8)+2bA2+(xA2+yA2)A2-4y(xA2+yA2)+4yA26-3aA8-(-5A2-6)(xA2+2x)A2+3(xA2+2x)+xA2+2x+3(a+1)(a+2)+(2a+1)(a-2)

20、-12xA2(y+z)A2-2xy(x-z)(y+z)+yA2(x-z)A23(a+2)A2+28(a+2)-20(a+b)A2-(b-c)A2+aA2-cA28x(x+1)(xA2+x-1)-2xA2(x-1)A2-3(xA2-x)-5614a(a-b)+(a-b)A211.-ab(a-b)A+a(b-a)A212.3 (x+2) 2x=5 4x13.5 (x+2a) -a=2 (b-2x) +4a3.14*3.42 (2)972*3.14*1/4-|98|+76+(-87)*2356+(-75)-(7)-(8+4+3)5+21*8/2- V121-5968/21-8-11*8+61-2/9

21、-7/9-564.6-(-3/4+1.6-4-3/4)1/2+3+5/6-7/122/3-4-1/4*(-0.4)/1/3+2 22+(-4)+(-2)+4*3-2*8-8*1/2+8/1/8(2/3+1/2)/(-1/12)*(-12)(-28)/(-6+4)+(-1)2/(-2)+0/7-(-8)*(|-2卜5A4)(1/3+2/3)/1/2-|-9+(-5)|18-6/(-3)*(-2)-|-9|(5+3/8*8/30/(-2)-3(-84)/2*(-3)/(-6)1/2*(-4/15)/2/3 |-3x+2y-5x-7y|-|-9x+2y|-5+21*8/2-6-5968/21-8-1

22、1*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)1/2+3+5/6-7/12 2/3-4-1/4*(-0.4)/1/3+222+(-4)+(-2)+4*3-V64-5A2-2*8-8*1/2+8/1/8(2/3+1/2)/(-1/12)*(-12)(-28)/(-6+4)+(-1)2/(-2)+0/7-(-8)*(-2) (1/4-5/6+1/3+2/3)/1/218-6/(-3)*(-2) (5+3/8*8/30/(-2)-3(-84)/2*(-3)/(-6)1/2*(-4/15)/2/3+ V9-3x+2y-5x-7y+-5+21*8/2-6-5968/21-8-

23、11*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)1/2+3+5/6-7/12 2/3-4-1/4*(-0.4)/1/3+222+(-4)+(-2)+4*3-2*8-8*1/2+8/1/8 (2/3+1/2)/(-1/12)*(-12)(-28)/(-6+4)+(-1) 2/(-2)+0/7-(-8)*(-2)(1/4-5/6+1/3+2/3)/1/218-6/(-3)*(-2) (5+3/8*8/30/(-2)-3 (-84)/2*(-3)/(-6) 1/2*(-4/15)/2/3-3x+2y-5x-7y-(-3A2+5A7)-1+2-3+4-5+6-7+ V9-5

24、0-28+(-24)-(-22)-19.8-(-20.3)-(+20.2)-10.8;0.25- +(-1 )-(+3 ).-1-23.33-(+76.76) 1-2*2*2*2-5A2+(6A2-5A2) (-6-24.3)-(-12+9.1)+(0-2.1) -1+8-7+5A7-(-5+，9) 125*3+125*5+25*3+259999*3+101*11*(101-92) (23/4-3/4)*(3*6+2)3/7 义 49/9 - 4/38/9 X 15/36 + 1/273/14 X2/3 + 1/68X5/4+1/4*| -7-8|6+ 3/8 -3/8+64/7 义 5/9

25、+ 3/7 义 5/95/2 - ( 3/2 + 4/5)7/8 +( 1/8 + 1/9)9 义 5/6 + 5/63/4 X 8/9 - 1/37 义 5/49 + 3/146 义(1/2 + 2/3)8 X 4/5 + 8 义 11/531 义 5/6 - 5/69/7 -( 2/7 - 10/21 )5/9 义 18 - 14 X 2/74/5 义 25/16 + 2/3 义 3/414 义 8/7 - 5/6 义 12/1517/32 - 3/4 X 9/243A45 义 2/9 + 1/35/7 X 3/25 + 3/71/5 X 2/3 + 5/65/3 义 11/5 + 4/3

26、9/22+1/11 +1/2- V16945A8 义 2/3 + 1/3 义 157/19 + 12/19 X 5/61/4 + 3/4+ 2/38/7 X 21/16 + 1/2101A4X(-1/5 -1/5X21)50 +，160+ 40A5120-144+ 18+35347+45X 2-4160- 5237A2(58+37) + ( 64-9 X5)95 + (64-45)178-145+5 X 6+42812-700 + (9+31X11)85+14X (14+208+ 26)120-36 X 4+18+35(58+37) + (64-9X5)0.12 X 4.8 +0.12 X4.

27、80.12 X 4.8 +0.12 X4.8(3.2 X1.5+2.5 )+1.66-1.6+4= 5.38+7.85 -5.37=7.2 + 0.8 -1.2 X 5= 6-1.19X3 -0.43=6.5 X (4.8-1.2 X4)=5.8 X (3.87-0.13 ) +4.2X3.7432.52- (6+9.728 + 3.2) X 2.5(7.1-5.6 ) X 0.9-1.15+2.55.4 + 2.6 X (3.7-2.9 ) +0.6212X6+ (12-7.2 ) -612X6+ 7.2 -60.68 X 1.9+0.32 X1.958+370) + ( 64-45)420

28、+580-64X21 - 28136+6X (65-345 + 23)15-10.75 X0.4 -5.718.1 + (3-0.299 +0.23) X 1(3.2 X1.5+2.5 )+1.63.2 X6+ (1.5+2.5 )+1.60.68 X 1.9+0.32 X1.910.15- 10.75 X0.4 -5.75.8 X (3.87-0.13 ) +4.2X3.7432.52- (6+9.728 + 3.2) X 2.5(7.1-5.6 ) X 0.9-1.15+2.55.4 + 2.6 X (3.7-2.9 ) +0.6212X6+ (12-7.2 ) -612X6+ 7.2 -

29、633.02 - (148.4-90.85) +2.576.(25%-695%-12%)*367/4*3/5+3/4*2/51-1/4+8/9/7/97+1/6/3/24+2/218/15*3/53/4/9/10-1/68/3+1/2)/5/6-1/3/1/79/5+3/5/2+3Z48A6(2-2/3/1/2)*2/58+5268.32-25693+456-52*887.5%+63258/2+1/3+1/489+456-785%+. 3/7 X 49/9 - 4/39 X 15/36 + 1/272X 5/6 -2/9X33 5/4 + 1/494+ 3/8 -3/8+695/7 义 5/9

30、 + 3/7 义 5/96/2 - ( 3/2 + 4/5)8 + ( 1/8 + 1/9)8 义 5/6 + 5/61/4 X 8/9 - 1/31QX 5/49 + 3/141.5 X ( 1/2 + 2/35/8 + 5/4 + 3/23 + 9/113.1 X 5/6 5/64/7 -( 2/7 - 10/21 )19 X 18 - 14 X 2/75 义 25/16 + 2/3 义 3/44 X 8/7 - 5/6 义 12/157/32 - 3/4 X 9/242/3 + 1/2 1/4 X 2/52-6/13 -9/26 2/32/9 + 1/2 +4/5 +3/810 + 5/

31、9 + 1/6 X41/2 X 2/5 +9/10- 9/205/9 X3/10+ 2/7 + 2/51/2 + 1/4 X 4/5 - 1/83/4 又 5/7 义 4/3 1/223-8/9 X 1/27 +1/2718X5/6 +2/5 +411/2 +3/4 X5/12 X4/58/9 X 3/4 3/8 + 3/41.2 X2.5+0.8 X2.58.9 X 1.25-0.9 X1.2512.5 X7.4 X0.89.9 X 6.4- (2.5+0.24)6.5 X9.5+6.5 X0.50.35 X 1.6+0.35 X3.40.25 8.6 46.72-3.28-1.720.45

32、+6.37+4.555.4+6.9 X3- (25-2.5 )2 41846-620-3804.8 46+4.8 540.8+0.82.51.25 X3.6 X8X2.5 -12.5 X2.428X12.5-12.5 X2023.65- (3.07+3.65 )(4+0.4 X0.25) 8X7X1.25 1.65 99+1.6531 X 5/65/648X1.25+50X1.25 X0.2 X87.8 X 9.9+0.78(1010+309+4+681+6)X 123X9146X782X6X8545.15 X7/8+6.1 -0.606253/7 X 49/9 - 4/38/915/36 +

33、 1/2712X 5/6 -2/9X38 5/4 + 1/46+ 3/8 -3/8+64/75/9 + 3/75/95/2 - ( 3/2 + 4/5)7/8 +( 1/8 + 1/9)9 5/6 + 5/63/48/9 - 1/375/49 + 3/146 X ( 1/2 + 2/3)84/5 + 811/59/7 -( 2/7 - 10/21 )5/9 义 18 - 14 X 2/74/5 义 25/16 + 2/3 义 3/414 义 8/7 - 5/6 义 12/1517/32 - 3/4 X 9/243 X 2/9 + 1/35/7 义 3/25 + 3/73/14 X 2/3 +

34、1/61/5 X 2/3 + 5/69/22 + 1/11+ 1/25/3 义 11/5 + 4/345 义 2/3 + 1/3 义 157/19 + 12/19 X 5/61/4 + 3/4+ 2/38/7 X 21/16 + 1/2101 义 1/5 - 1/5 义 2150+160+40 (58+370) + (64-45) 120-144+ 18+3532.52- (6+9.728 + 3.2) X 2.5347+45X 2-4160- 52(58+37) + (64-9X5)95 + (64-45)178-145+ 5 义 6+42 420+580 - 64 X 21 - 28812

35、-700 + (9+31X11)(136+64) X (65-345 + 23)85+14X (14+208+ 26)(284+16) X (512-8208 + 18)120-36 X 4+18+35(58+37) + ( 64-9 X5)(6.8- 6.8 X 0.55) +8.50.12 义 4.8 +0.12 X4.8(3.2 X1.5+2.5 )+1.63.2 义(1.5+2.5 )+1.66-1.6+4= 5.38+7.85 -5.37=7.2 + 0.8 -1.2 X 5= 6-1.19X3 -0.43=6.5 X (4.8-1.2 X4) = 0.68 X 1.9+0.32 X

36、 1.910.15- 10.75 X 0.4 -5.75.8 X (3.87-0.13 ) +4.2X3.74(7.1-5.6 ) X 0.9-1.15+2.55.4 + 2.6 X (3.7-2.9 ) +0.6212X6+ (12-7.2) -6 (4) 12X6 + 7.2-6102A2X4.5+8A5- V5297.8 X 6.9 +2.2 X6.95.6 X 0.258X (20-1.25)127+352+73+4489+276+135+3325+71+75+29 +88243+89+111+579405-2940- 28X21920-1680+ 40+7690+47X 52-398

37、148+3328 64-75360X 24+32+7302100- 94+48X 5451+ (2304-2042)义 234215+ (4361-716) +81(247+18) X27+2536-720 + (360+18)1080+ (63-54) X80(528+912) X 5-61788528- 41 X 38-904264+318-8280- 69(174+209) X 26- 9000814- (278+322) + 151406+735X 9+453168- 7828+ 38+504796-5040 + (630+7)285+ (3000-372) +361+5/6-19/1

38、23x(-9)+7x(-9(-54)x1/6x(-1/3)18.1 + (3-0.299 +0.23) 乂 1(6.8- 6.8 X 0.55) +8.5 0.12 X 4.8 +0.12 X4.8(3.2 X1.5+2.5 )+1.63.2 X ( 1.5+2.5 )+1.65.6- 1.6+45.38+7.85-5.377.2+0.8-1.2X56-1.19X3-0.436.5 X (4.8-1.2 X4)0.68 X 1.9+0.32 X1.9115-10.75 X 0.4-5.75.8 X (3.87-0.13 ) +4.2X3.7432.52- (6+9.728 + 3.2) X 2

39、.5(7.1-5.6 ) X 0.9-1.15+2.55.4 + 2.6 X (3.7-2.9 ) +0.6212X6+ (12-7.2 ) -612X6+ 7.2 -633.02 - (148.4-90.85) +2.5二.解方程2x=7(x-5)8(3x+3)=2404.74+4x-2.5x=8.1(2.81+x) +2.81=1 15x-30=16(x-2)(-3)A3-3A3(-1)A2-5.62A2+3A3-4A4 (2A4-3A2)A3-5A5 (1.6A2-2A3)-2.1A2(5.66 X2)A2-15A2 (-15)Ax=225,x=?(-4)A2- 4A2 X 2A2(-5

40、.6)A2+3A25.6A2+(- 5.6)A2 X(-1)A2 3x+28-x=56 1.5x+6=3.75 2(3.6x+2.8)=-1.6 9.5x+9.5=19 18(x-35)=-36 x+7-(-36+8A2)/2=8+7A4/3a-7-98+7a=3.2*5a89/2+35/6x=3*9+2A3/5+7x3X+189/3=521/24Y+119*a3=22/113X*189=5*4A5/38Z/6=458/53X+77=594Y-6985=8187X*13=57Z/93=4115X+863-65X=5458Y*55=274897(2x-1)-3(4x-1)=4(3x+2)-1 (

41、5y+1)+ (1-y)= (9y+1)+ (1-3y)-6(-7A4*8)-4=x+220%+(1-20%)(320-x)=320 乂 40%2(x-2)+2=x+12(x-2)-3(4x-1)=9(1-x) 11x+64-2x=100-9x15-(8-5x)=7x+(4-3x)3(x-7)-29-4(2-x)=223/2(2/3(1/4x-1)-2-x=22x+7A2=1571)判断题：判断下列方程是否是一元一次方程:-3x-6x2=7() 5x+1-2x=3x-2 () 3y-4=2y+1.()判断下列方程的解法是否正确：解方程3y-4=y+3解：3y-y=3+4,2y=7,y=3.5解

42、方程：0.4x-3=0.1x+2解：0.4x+0.1x=2-3;0.5x=-1 ,x=-2解方程解：5x+15-2x-2=10,3x=-3,x=-1;解方程解：2x-4+5-5x=-1 ,-3x=-2,x=.()2)填空题：(1)若2 (3-a) x-4=5是关于x的元一次方程，则aw(2)关于x的方程ax=3的解是自然数，则整数a的值为_( 3)方程5x-2(x-1)=17 的解是 _( 4) x=2 是方程 2x-3=m- 的解，则m=_ .(5)若-2x2-5m+1=0是关于x的一元一次方程，则 m=_ .( 6)当y=_ 时，代数式5y+6 与 3y-2 互为相反数.(7)当m=_时，

43、方程 的解为0.(8)已知aw 0.则关于x的方程3ab-(a+b)x=(a-b)x 的解为3) 选择题：(1)方程ax=b的解是().A.有一个解x= B .有无数个解C.没有解D.当aw0时，x=( 2)解方程( x-1)=3, 下列变形中，较简捷的是()A. 方程两边都乘以4，得3( x-1 ) =12B. 去括号，得x- =3C. 两边同除以，得 x-1=4D.整理，得( 3)方程2- 去分母得()A.2-2(2x-4)=-(x-7) B.12-2(2x-4)=-x-7C.12-2(2x-4)=-(x-7) D. 以上答案均不对( 4)若代数式比 大 1，则 x 的值是() .A 13

44、 B C 8 D( 5) x=1.5 是方程()的解 .A.4x+2=2x-(-2-9)B 234(5x-1)-8-2=8C.4x+9 =6x+64) 解答下列各题： 1) x等于什么数时，代数式 的值相等？ 2) 2) y 等于什么数时，代数式的值比代数式的值少3？(3)当m等于什么数时，代数式2m-的值与代数式的值的和等于5?( 4)解下列关于x 的方程：ax+b=bx+a;(a wb);三 . 化简、化简求值化间求值:1、 -9(x-2)-y(x-5)( 1)化简整个式子。(2)当x=5时，求y的解。2、5(9+a) Xb-5(5+b) Xa( 1)化简整个式子。( 2)当a=5/7 时，求式子的值。3、 62g+62(g+b)-b( 1)化简整个式子。( 2)当g=5/7 时，求 b 的解。4、 3(x+y)-5(4+x)+2y( 1)化简整个式子。5、 (x+y)(x-y)