1138+(-22)+(+62)+(-78) (-8)+(-10)+2+(-1) (-23)+0+(+4)+(-6)
+(-12)
6+(-7)+(9)+2 72+65+(-105)+(-28) (-23)+|-63|+|-37|+(-77)
(-20)-(+5)-(-5)-(-12) (-23)―(-59)―(-3.5) |-32|―(-12)―72―(-5) (-
145110423168877510)―(-)― (+)―(-)―(-)― (-5)―3―(-
3.2)―7
34(-0.25)×(-7)×4×(-7) (-7)×(-
148457)×(-12) (-8)×4×(-1 2)×(-0.75)
4×(-96)×(-0.25)×(+÷
47521354 (7-118+14)×56 (6―34―79)×36
23)÷(-
3791) (-13)÷9 0.25÷(-18) -36÷(-13)÷(-
) (-1)÷(-4)
676111)×(-79) 0÷[(-34)×(-7)] -3÷(3-4) (-247)÷(-
3÷(-6)
37733441(-1620512)×(-15×4) 187(-2.4) 2÷(-7)×7÷(-57)
1(1)(-8)×5-40; (2)(-1.2)÷(-)-(-2);
313(3)-20÷5×+5×(-3)÷15; (4)-3[-5+(1-0.2÷)÷(-2)];
543122517 (5)-23÷1×(-1)2÷(1)2; (6)-+()×(-2.4)
335586123213(1)11+(-22)-3×(-11); (2) (-2)-32;(-)(--)0; (3)
433377353-(-4)(4)23÷[ (-2)]; (5)÷; (6); (-)(-)(-60)(+)48846134712(7)-7+2×3+(-6)÷; (8). (--+-)(-154)322620512去括号:
(1)a+(-b+c-d); (2)a-(-b+c-d) ; (3)-(p+q)+(m-n); (4)(r+s)-(p-q).
(1)(2x-3y)+(5x+4y) (2)(8a-7b)-(4a-5b) (3)a-(2a+b)+2(a-2b) (4)3(5x+4)-(3x-5)
(5)(8x-3y)-(4x+3y-z)+2z; (6)-5x2+(5x-8x2)-(-12x2+4x)+2;
(7)2-(1+x)+(1+x+x2-x2);
2222
(8)3a+a-(2a-2a)+(3a-a) (1)a+3(2b+c-d); (2)3x-2(3y+2z).
(3)3a+4b-(2b+4a); (4)(2x-3y)-3(4x-2y). (1)2a-3b+[4a-(3a-b)];
整式的加减
a1) 2、2a(5ba)b 313、-3(2xy)2(4xy)2009 4、-2m3(mn1)21
21、56(2a5、3(x2y2)(y2z2)4(z2y2) 6、x2-[x2-(x2-1)-1]-1
7、-2(2a3b)3(2b3a) 8、2(x2xy)3(2x23xy)2[x2(2x2xyy2)]
139、3a2bab2ab2a2b 10、 7p3p2p12p3p
441、2a2(aba2)8abab; 2、(a3-2a2+1)-2(3a2-2a+1)
2121213、x-2(1-2x+x2)+3(-2+3x-x2) 4、(5a2bab2)(4ba22ab2)
25、-4(6m24m3)(2m24m1) 6、(8xyx2y2)3(x2y25xy)
a1) 8、-2m3(mn1)21 33379、3(x24y2)(6y2z2)4(z2y2) 10、(xy)(xy)2(xy)2
10410111、3(-ab+2a)-(3a-b)+3ab 2、2a2-[(ab-a2)+8ab]-ab
2213、3a2[5a(a3)2a2]4 4、4x2y-3[6xy-2(4xy-2)-x2y]+5
215、-2a2-[3a-(a-3)+a2]+5 6、3x2-[7x2-2(x2-3x)-2x]
2537、10x2n6xn(xn19x2n)(4xnxn1) 8、3a2b[4ab25(ab2a2b)ab2]a2b
327、56(2a2
9、7xy+xy3+4+6x- xy3-5xy-3 10、-2(4a-3b)+3(5b-3a)
5
解方程
(1)2x+8=16 (2)
x =10 (3)x+7x=8 (4)9x-3x=6 54(5)6x-8=4 (6)5x+x=9 (7)x-8=6x (8) x=20
5(9)2x-6=12 (10)7x+7=14 (11)6x-6=0 (12)5x+6=11
2421(4) 3.5X+1.8=12.3 (5) X+X=21 (6) X+X=
555223(7) 3.6X÷2=2.16 (8) X+X= (2) 0.8X-4=1.6
7423(3) 5X÷2=10 (4) X-0.25X=3 (9) X-X=
51023932(10) X-= (11) 2X+7X= (12) +X=
5101085714135(13) X= (14) X= (15) X=10
1025(16) 180+6X=330 (17) 2.2X1)3(x-2)=2-5(x-2) (2) 2(x+3)(3) 3(x1)2(x2)2x3 (4) (5)
2x-13 =x+22 +1 (6) (7)
x83x (8) (9 ) 314x0.42x0.3 (10) (11) 3y1225y743 (12)
(13) 1m332m41 (14) (15)x1xx2361 (16) (17) 12(x-3)=2-12(x-3) (18)(19) x1x30.20.013 (20) (21)
x1x24x362 (22) (23) 12[x12(x1)]23(x1)249-1=10 (18) X-0.8X=10 -5(1-x)=3(x-1) 3(x2)1x(2x1) 13x121 31.2x45x12
3x124x251
536x72x1 yy1y2225 3xx8231
x2x0.210.53
x22x4361
324x13232x
(24)237(3y+7)=2 - 2y
(
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