11,, ,, ,6,,,1.5,1.4,4.3,5.2,3.6,,32,,
111,,,, ,0.5,,,,2.5,7.3,2.5,(,2.4),2.5,(,1.7),,,,3624,,,,
,,3,,125,,,,,, ,,,3,,5,1,0.2,,,2,|,5|,1,,,1,,,,,,,,,,,,5233,,,,,,,,,,
2,,311,,22,,,,,2,,, ,9+5×(,6) ,(,4)?(,8) ,,,,442,,,,,,
2x,1111,,,,,,0.3,3,,,24,6x,,3 ,,12332,,
1
x,12,3x1 15,(―)―15―(―0.25) ,,1423
941111(,81),,,(,32) —48 × (,,,) 49436612
,,35,,22 (2m,2)×4m ,,,4,,,,,,,,48,,,,
1422 2223(2x,y),(2x,y) (xy)?(,12xy)?(,xy) 33
[(3x,2y)(3x,2y),(x,2y)(3x,2y)]?3x
先化简后求值:m(m,3),(m,3)(m,3),其中m,,4(
2
431232 2 4×(,3),13,(, ),|,4| ,3,,(,2),(1,×)?(,2), 254
3x,15x,72x-19=7x+31 , = 1 46
22222(xy,xy),2(xy,x),2xy,2y化简(求值)的值,其中 x,,2,y,2
122332,,,,,,,2116()4(3) 56323xxxx,,,,,,,,,2
11,,332223先化简,再求值,已知a = 1,b = —,求多项式ababababb,,,,,222,,,,,,32,,的值
123452-2-(-3)×(-1)-(-1) -1-(1-0.5)××[2-(-3)] 3
3
33222211,(,22),3×(,11) (2)(,3),(),,6,,293
,2(x,1),4 ,8x,3,1/2x
1,,111,,18,6,,2,, ,,48(),,,,36412,,
12122(,),3-(-6) -1-(1-0.5)×(-1)×[2-(-3)] 33
32126334 ),,|-3|,(,0.25),(),2-3×(-2)-(-1)(, 232
4
1111,1,,, (,2),,(,3)2483
71112222,3,2,3,(,2) [50,(,,),(,6)],(,7) 9126
3y,.先化简,再求值:,其中, x,,13(x,y),2(x,y),24
7722222(4a,3a),(2a,a,1),(2,a,4a),,,(,6) 化简: 483
11312,,,,22x2xyxy,,,,,先化简,再求值:,其中x=,2,y=。 ,,,,23233,,,,
2x,15x,12(x,2),2,x,1 , ,1 36
5
31422,, ,1,,2,(,3)(,4),(,),30,(,6)64
2x,1x,2,,1解方程: 解方程: 4,3(2,x),5x32
3579111315311,,,,,,(,,),8,(,48) 2612203042564612
12202210,1,[3,(,),1] ,2+2×[(,1)+|,1|] 23
231()(24),,,,317315346(,,),(60,,60,,60,) 5212777
6
1,,,,,,6()2(1.5),,,,,,364(2.5)(0.1)5
22,,(3)3(3)(4),,,,,,,, ,1.5,1.4,4.3,5.2,3.6
11xy,,,,22,,,,,(23)(22)1xyxy45先化简,再求值:错误~未找到引用源。,其中
51,,13133,,22 ,,,,,,,,,454241245,,,,,,,,,,,,,,,,,8424864,,,,
,,1,,2222222 2323432xxyxx,,,,,322xyxyxyxx,,,,,,,,,,,,4,,,,
11,,,,,6,, ,,32,,
7
111,,,, ,0.5,,,,2.5,7.3,2.5,(,2.4),2.5,(,1.7),,,,3624,,,,
,,3,, ,,,3,,5,1,0.2,,,2,,,,5,,,,
122化简求值.2xy+[7x,3(2x,1),2xy],y,其中。 xy,,,2,2
,,,,,8,,1 8,(,10),(,2),(,5)
5131,,,,,,,5,,,24,,,, ,,,,2434,,,,
4816,,,,() ,,,,,,36(6)72(8) 5
8
14,,23xx,,,, 3,2(,3) ,2,2,,,,2,,5y,,23,,
,,125,,,,22( )4 ( 23 )xyxy,,, ,|,5|,1,,,1,,,,,,,,233,,,,,,
21,,2133222 ,,,,,,05.()(),3,,,,,1()()532,,33,,
12111213,,2326,,,(.)()02,,,,231 ,,,,,,2()()4132,,,,254,,
23623
,,12,,4551.()(.),,,,,075, ,,,,255,,,,
4231220147229232,,,,,,,,,,,()()()()
9
21,,341,,4333222117 ; ,,,1()(),,1()()()()(),,,,,,,,331,,,,,232,,2,,
11222222; ; ()()(),,,,,,,33232316,,,,()1559
25,,1+(,2)+,,2,3,,5 ()?()?(,0.25) 38
921113,, 2008 ,148,,,, ,,×(,)―× (,1),,,,643537,,
52,,2009,,,,,40,28,,19,,24,,,,,,,150.81 ,,,,3,,
10
3211,,,,,,23,,2,,4,, ,,,,60,,,,31215,,
222323223,,2,3,,1,,,,, 1,,,,,62,,,,35
31,,,,,16,,2,,,,4 5.6,7,3.4 ,,,,8,,
11121,,,,,,2412,,,,3,,,2,, ,,,,,,43232,,,,,,
332?[(,2),(,4)] 化简:,3(2x,5)+6x
11
(,14),(,16),(+6) 解方程:5(8,3x)=x
5123 ,,,,,,,(4)0.25(5)()82
12311122先化简,再求值:,其中 xy,,,,,xxyxy,,,,(2)()422323
1223(x,2xy),[3x,2y,2(xy,y)]当时,求代数式的值 x,,,y,,32
23×(,4),(,28) ?7 4×(,3),15?(,3),50
122222先化简,再求值: 2x+(,x+3xy+2y),(x,xy+2y),其中x=,y=3. 2
x,1x,24,x4x,3,2(x,1),1 ,, 362
12
33237712(1,,3),(,1),[(,2),3],(,) 48287
2123x,,x,x,,14x,3(20,x),3 36
x,13,2x,,1236x,7,4x-5
32(,4),(,),30,(,6) 4
2332先化简,再求值:(5a+2a,3+4a),(,a+4a+2a),其中a,1
233(,4),,8,(,3),(,3)42,(,),(,),(,0.25) 34
13
42324 ,2,,(,),(,1)7a,5b,(15a,b)93
22,3(2x,xy),4(x,xy,6)
1112(,4a,2a,8),(a,1)先化简,再求值:,其中a, 242
11251411723(,2),[(,),()],|,|,(,5) 9,(,15),(2.5,,3,1) 22425828
1223(x,2xy),[3x,2y,2(xy,y)]当x,,,y,,3时,求代数式的值。 2
13322(2)2(4),10,[(,4),(1,3),2],,,,, 4
1225a,[3a,2(2a,3),4a]a,,化简求值: ,其中 2
14
2232 ,20,(,14),(,18),13,1.6,[(,),(,3),(,2)]3
x3x,15x,3 2(3y,1),7(y,2),3,,4,326
(,8)+10+2+(,1) 5+(,6)+3+9+(,4)+(,7)
14112(,0.8)+1.2+(,0.7)+(,2.1)+0.8+3.5 +(,)++(,)+(,) 32523
(,17)+59+(,37) (,18.65)+(,6.15)+18.15+6.15
15
111112(,4)+(,3)+6+(,2) (,0.5)+3+2.75+(,5) 332442
(,1.9)+3.6+(,10.1)+1.4 (,7)+(+11)+(,13)+9
382119233+(,2.16)+9+(,3) 49+(,78.21)+27+(,21.79) 1111252121
222222aababababab先化简再求值:4,(,2,5),2(3,),其中=,1,b=, 3
xx--344356xx--=-=1 ()53
122008(-3+3)×[(-1)-(1-0.5×)] 3
16
5112-2×|-3|+(-6) ×(-)-|+|?(-) 8122
2x,113(-2x-5)+2x=9 2x-=-1 36
1122222化简求值:2x+(-x+3xy+2y)-2(0.5x-xy+y),其中x=,y=3. 22
3350.40.90.030.025xxx,,,,,,4(-+-)(-7) ,,74140.50.032
33,,12311,,,,122,,,,,,1(0.28-14+4) ,,,,,,422143,,,,,,,,
113530.713.5,,,,,,(-32.5)-7.10.075 44
2121,,,,22,,,,,,,,(3)242 ,,,,433,,,,
17
122化简求值 ,其中x=,1,y= 835232xyxxxyx,,,,,,,,2
1123222(,3),2 ?×3 ,1,[2,(1,×0.5)]×[3,(,2)] 33
13(1,,)×(,48) 2x,3,x,1 64
2x,15x,12(3x,7),2,1.5x ,,1 736
1311,,,,,442(3)80% ?x ,(x,22)?75% 3434
311,,,,,,,,,31 ,,,,539,,,,
18
13,,,,2362 ,,,,,,,,,,,3(2)(1)(3)3(2),,,,,,,,430.8(2),,,,65,,,,
x12,, ,,,,4437144xx,,,,,323,,
2323xx,, ,,132
2223(21)2(3)xxxxx,,,,,,,先化简,再求值,其中x,,3
35713,,[15.25,13,(,14.75)]×(,0.125)? ()? 3461222
13222,,,,213,1[8×(,3)]×0,(,5) 6?(,2)(,4)× 452
19
x,2(x,1),3x,(y,x),(5x,2y)
3x,4,7x,8x,(7,8x),3(x,2)
x,1x,23,x2x,,2,,(x,4) 2323
1311,,432 ,,25,,,25,,25,,-1-(-2)×5+0.25?(-),,2424,,
511232222,,5,(-4),-4××2?4 ,1,[2,(1,×0.5)]×[3,(,2)] 348
20
1311,,2362+,)×(,48) (,,,,,,,,,,,,3(2)(1)(3)3(2),,64126,,
941(,81),,,(,32)15,(―)―15―(―0.25) 449
2331129×(-12) 25×―(―25)×,25×(,) 42424
113(—5.3)+(—3.2)—(—2.5)—(+4.8) (—3)+(+8)—(—5) 424
235,,,,,,(,,,),(,12),48,6,,25,,4 346
21
11131,,,,,,,, -2+|5-8|+24?(-3) ,,,,,,,,11231,,,,,,,,24244,,,,,,,,
77 ,,,2004,,,,,,,1.51.43.64.35.2,,,,100100
1111112,,,,,, ()(-24) ,,,,,,121083,,,,3643333,,,,
311,,2(,1.25),8,1.25,(,8) -2- ,,,82,,
51,,,,,5.7,,1.8,2.3(-)+(+3.5)+(-) 66
22
131111,,8,,,,,,5, ,,,,,443243,,
22022223|3(3)|101,,,,,3,(,4),3,843,(,6),(,13,18); 213
3232(10x,6x,5x,4),(,9x,2x,4x,2) 8x,[3x,(7x,2),4]
2x,15x,1,,1 15,(7,5x),2x,(5,3x)68
x0.18,0.03x11,,,,y,y,8,1,,1 ,,330.50.02,,
23
,,323,,,, 12,(,8),(,11),(,6)5,,7,,7,,,,,,838,,,,,,
29231,,,4.5,,,,,,,,,24 ,,341258,,
1224,31,36,(,2),2,(,6),,,,,1,,2,,3 6
15x,(,2), 2x,1,1 36
21112(3)[()()],,,,,, 3.6?4.5-3×| - | 93412
24
11,,,,2222,,,,,,,, ,2,,4,,1,3,,2,2,,2,,,,,,22,,,,
,,3,,322 ,,,,,5,,2,1,0.8,,,,,2,,2,,,,4,,,,
(,3)×(,9),8×(,5) ,63?7+45?(,9)
132233,(,),3×2,(,3×2) (,0.1), 45
32126334),,|-3|,(,0.25),(),2,3×(,2),(,1) (, 232
21332223,(-1),(,1.2),0.4[11×2,|3?3|,(,3),3,? 2 ) 492
25
2,,2,,3 02524.,,,,,,1,,,,,,
,,3,,,,
2
1,,3325122222 ,,,,,,2210,,,,,,31203..,,,,31,,,,,,,,,,,,4
,,3
1,,32 ,2,,,,,,0528.,,,,,,,,
,,2
2,3,4 2-7+4-3
393324-(-2)-3?(-1) (-5)×(-)?(-) 525
11131123,1(-2)-(-1)×(-)?- 25×,(-25)×,25× 236424
26
71122231?[(-2)×0.5-(-2.24)?(-2)]-1 {4+[-9×(+)-0.8]}?(-5) 8295
(-16)+(+27)+(+9)+(一24) (一5)+(一2)+(+9)一(一8)
(一3)×18+14 ; ,9,40,25
114(,1),(,3)(,2),,(,3) 553
313111,,,36,(,,),1,2,(,),,3; ; 9618432
27
22,3,2,3,(,2) ,20,(,14),(,18),13
111211 (,24)×(,+) ,,1,(,2),(,2.75)524642
1311,,432 ,,-1-(-2)×5+0.25?(-)25,,,25,,25,,,,2424,,
113232设A=2x+3x-x, B=4x+8x-2x+6,当x=时,求A-B的值 22
222222(5a,3b),[(a,b),(5a,3b)],其中a,,1,b,1
21,(,)— 9—(—3) 510
28
113(—5)—5 (—3)+(+8)—(—5) 424
1(—5.3)+(—3.2)—(—2.5)—(+4.8) 15,(―)―15―(―0.25) 4
9423(,81),,,(,32) 29×(-12) 4924
311,,,,,,,48,6,,25,,425×―(―25)×,25×(,) 424
235(,,,),(,12)12—(—18)+(—7)—15 346
29
512,,22x,,,其中,,,,,,2162xxxx,,,,323,,
11131,,,,,,,, -2+|5-8|+24?(-3) ,,,,,,,,11231,,,,,,,,24244,,,,,,,,
77 ,,,2004,,,,,,,1.51.43.64.35.2,,,,100100
1112,,,, ,,,,,,91929……,99 ,,,,,121083,,,,,,,,,,,,3333,,,,
111,,,,,,,,,,1234,,,,99100,…… ()(-24) ,,,,,,,,,,,,364
(,1.25),8,1.25,(,8)
30
35111,,2 -2- (-)+(+3.5)+(-) ,,,6682,,
13,,,,,,8,,,,,,5, ,5.7,,1.8,2.3,,44,,
1111233,(,4),3,843,(,6),(,13,18);,,, 3243
2202223232|3(3)|101,,,,,(10x,6x,5x,4),(,9x,2x,4x,2) 213
8x,[3x,(7x,2),4]15,(7,5x),2x,(5,3x)
31
2x,15x,111,, ,, ,,1y,y,8,1,,3368,,
x0.18,0.03x,,1 0.50.02
32