初一计算题
11,,,1.5,1.4,4.3,5.2,3.6 ,,,6,,,,32,,
111,,,, ,2.5,7.3,2.5,(,2.4),2.5,(,1.7),0.5,,,,,,,3624,,,,
,,3,,125,,,,,, ,3,,5,1,0.2,,,,,2,|,5|,1,,,1,,,,,,,,,,,,5233,,,,,,,,,,
2,,311,,2,,,2,,, ,,,,,,442,,,,,,
2 ,9+5×(,6) ,(,4)?(,8)
111,,1 15,(―)―15―(―0.25) ,,,,0.3,3,,,2,,41233,,
941111(,81),,,(,32)(,,,) —48 × 49436612
,,35,,2 ,,,4,,,,,,,,48,,,,
1
先化简后求值:
m(m,3),(m,3)(m,3),其中m,,4(
143232 2 4×(,3),13,(, ),|,4| ,3,,(,2),(1,×)?(,2), 254
3x,15x,72x-19=7x+31 , = 1 46
2222化简(求值)的值,其中 x,,2,y,22(xy,xy),2(xy,x),2xy,2y
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
33222211,(,22),3×(,11) (2)(,3),(),,6,,293,2(x,1),4 ,8x,3,1/2x
1,,111 ,,18,6,,2,,48(),,,,,,64123,,
12122(,),3-(-6) -1-(1-0.5)×(-1)×[2-(-3)] 33
32126334 ),,|-3|,(,0.25),(),2-3×(-2)-(-1)(, 232
1111,1,,,(,2),,(,3) 2483
71112222[50,(,,),(,6)],(,7) ,3,2,3,(,2)9126
3x,,1y,.先化简,再求值:3(x,y),2(x,y),2,其中, 4
2
7722222 化简: ,,,(,6)(4a,3a),(2a,a,1),(2,a,4a)483
11312,,,,22先化简,再求值:,其中x=,2,y=。 x2xyxy,,,,,,,,,32323,,,,
2x,15x,12(x,2),2,x,1 , ,1 36
13422,,,1,,2,(,3)(,4),(,),30,(,6) 64
3579111315311,,,,,,(,,),8,(,48) 2612203042564612
3
12221020 ,2+2×[(,1)+|,1|] ,1,[3,(,),1]23
231()(24),,,,317315346 (,,),(60,,60,,60,)5212777
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:,其中
51,,13133,,22,,,,,,,,,45424 1245,,,,,,,,,,,,,,,,,8424864,,,,
4
,,1,,2222222 2323432xxyxx,,,,,322xyxyxyxx,,,,,,,,,,,,4,,,,
11,, ,,,6,,,,32,,
111,,,, ,2.5,7.3,2.5,(,2.4),2.5,(,1.7),0.5,,,,,,,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)
5
5131,,,, ,,,5,,,24,,,,,,,,2434,,,,
4 816,,,,(),,,,,,36(6)72(8)5
14,,23 3,2(,3) yxx,,,,,2,2,,,,2,,5,,23,,
,,125,,,,22 ,|,5|,1,,,1,,( )4 ( 23 )xyxy,,,,,,,,,233,,,,,,
2121,,33222,,,,,,05.()(),3 ,,,,,1()()5,,33,,32
21312111,,2326,,,(.)()02,,,,231 ,,,,,,2()()4132,,,,254,,23623
6
,,12,, 4551.()(.),,,,,075,,,,,255,,,,
423 1220147229232,,,,,,,,,,,()()()()
23411,,,,3222117433()()()()(),,,,,,,,331,,,,1()(),,1 ; ,,,,2322,,,,
11222222()()(),,,,,,,332323; ; 16,,,,()1559
25,,1+(,2)+,,2,3,,5 ()?()?(,0.25) 38
921113,, 2008 , ,,×(,)―× (,1)148,,,,,,,,735364,,
7
52,,2009 ,,,,,40,28,,19,,24,,,,,,,150.81,,,,3,,
3211,, ,,,,23,,2,,4,,,,,,60,,,,31215,,
223223223,,,,, ,,2,3,,11,6,,,,2,,,,35
31,, ,,,16,,2,,,,4,,,,8,,
11121,,,,,,24 12,,,,3,,,2,,,,,,,,43232,,,,,,
8
5123 ,,,,,,,(4)0.25(5)()82
12311122先化简,再求值:,其中 xy,,,,,xxyxy,,,,(2)()422323
122x,,,y,,3当时,求代数式的值 3(x,2xy),[3x,2y,2(xy,y)]2
122222先化简,再求值: 2x+(,x+3xy+2y),(x,xy+2y),其中x=,y=3. 2
2332先化简,再求值:(5a+2a,3+4a),(,a+4a+2a),其中a,1
23342,(,),(,),(,0.25)(,4),,8,(,3),(,3) 34
9
42324 ,2,,(,),(,1)7a,5b,(15a,b)93
22 ,3(2x,xy),4(x,xy,6)
1112先化简,再求值:(,4a,2a,8),(a,1),其中a, 242
14117112523(,2),[(,),()],|,|,(,5)9,(,15),(2.5,,3,1) 22425828
122x,,,y,,3当时,求代数式的值。 3(x,2xy),[3x,2y,2(xy,y)]2
13322(2)2(4),,,,, ,10,[(,4),(1,3),2]4
122a,,化简求值: ,其中 5a,[3a,2(2a,3),4a]2
10
2232 ,20,(,14),(,18),13,1.6,[(,),(,3),(,2)]3
x3x,15x,3 2(3y,1),7(y,2),3,,4,326
382119233+(,2.16)+9+(,3) 49+(,78.21)+27+(,21.79) 1111252121
222222ababababab先化简再求值:4,(,2,5),2(3,),其中=,1,b=, a3
2121,,,,22,,,,,,,, (3)242,,,,433,,,,
11
122化简求值 ,其中x=,1,y= 835232xyxxxyx,,,,,,,,2
13(1,,)×(,48) 64
311,,,, ,,,,,31,,,,539,,,,
31,,,,2362 ,,,,,,,,430.8(2),,,,,,,,,,,3(2)(1)(3)3(2),,,,56,,,,
222x,,3先化简,再求值,其中 3(21)2(3)xxxxx,,,,,,,
12
511232222-4××2?4 ,1,[2,(1,×0.5)]×[3,(,2)] ,,5,(-4),348
1311,,2362+,)×(,48) (,,,,,,,,,,,,3(2)(1)(3)3(2),,64126,,
113(—5.3)+(—3.2)—(—2.5)—(+4.8) (—3)+(+8)—(—5) 424
235(,,,),(,12),,,,,, ,48,6,,25,,4346
11131,,,,,,,, 2-+|5-8|+24?(-3) ,,,,,,,,11231,,,,,,,,24244,,,,,,,,
13
77 ,,,,,,,1.51.43.64.35.2,,,2004,,,,100100
1111112,,,,,, ()(-24) ,,,,,121083,,,,,3643333,,,,
311,,2 -2- (,1.25),8,1.25,(,8),,,82,,
51(-)+(+3.5)+(-) ,,,, ,5.7,,1.8,2.366
131111,,8,,,,5,,,, ,,,,443243,,
14
22022223 |3(3)|101,,,,,3,(,4),3,843,(,6),(,13,18);213
3232 8x,[3x,(7x,2),4](10x,6x,5x,4),(,9x,2x,4x,2)
2x,15x,1,,1 15,(7,5x),2x,(5,3x)68
x0.18,0.03x11,,,,1 ,,y,y,8,1,,0.50.0233,,
,,323,,,,5,,7,,712,(,8),(,11),(,6) ,,,,,,838,,,,,,
15
29231,, ,4.5,,,,,,,,,24,,583412,,
1242,,,, ,1,,2,,3,31,36,(,2),2,(,6)6
15x,(,2),2x,1,1 36
21112(3)[()()],,,,,, 3.6?4.5-3×| - | 93412
11,,,,2222 ,,,,,,,,,2,,4,,1,3,,2,2,,2,,,,,,22,,,,
16
,,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
2,,23,,02524.,,,,,,1 ,,,,,,,,3,,,,
17
211332522,,222 ,,,,,,2210,,,,,,31203..,,,,31,,,,,,,,,,,,,,43
132,, ,2,,,,,,0528.,,,,,,,,,,2
2,3,4 2-7+4-3
393324-(-2)-3?(-1) (-5)×(-)?(-) 525
11131123,1(-2)-(-1)×(-)?- 25×,(-25)×,25× 236424
71122231?[(-2)×0.5-(-2.24)?(-2)]-1 {4+[-9×(+)-0.8]}?(-5) 8295
18
(-16)+(+27)+(+9)+(一24) (一5)+(一2)+(+9)一(一8)
,9,40,25(一3)×18+14 ;
141(,1),(,3)(,2),,(,3) 355
111313,,,36,(,,),1,2,(,),,3; ; 9618432
22 ,20,(,14),(,18),13,3,2,3,(,2)
111211 (,24)×(,+) ,,1,(,2),(,2.75)642524
19
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
113(—5)—5 (—3)+(+8)—(—5) 424
20
1(—5.3)+(—3.2)—(—2.5)—(+4.8) 15,(―)―15―(―0.25) 4
9423(,81),,,(,32) 29×(-12) 4924
31125×―(―25)×,25×(,) ,,,,,,,48,6,,25,,4424
235(,,,),(,12)12—(—18)+(—7)—15 346
512,,22x,,,其中,,,,,,2162xxxx,,,,323,,
11131,,,,,,,, -2+|5-8|+24?(-3) ,,,,,,,,11231,,,,,,,,24244,,,,,,,,
21
77 ,,,,,,,1.51.43.64.35.2,,,2004,,,,100100
1112,,,, ,,,,,,91929……,99 ,,,,,121083,,,,,,,,,,,,3333,,,,
111,,,,,,,,,,1234,,,,99100…… ()(-24) ,,,,,,,,,,,,,364
(,1.25),8,1.25,(,8)
35111,,2 -2- (-)+(+3.5)+(-) ,,,6682,,
22
13,, ,,,,,5.7,,1.8,2.38,,,,5,,,,,44,,
111123 ,,,3,(,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)
2x,15x,111,,,,1 ,,y,y,8,1,,6833,,
x0.18,0.03x,,1 0.50.02
23