求100道先化简再求值的题目 求100道分式方程计算题，先化简再求值100道
\u521d\u4e00\u5e74\u7ea7\u5148\u5316\u7b80\u518d\u6c42\u503c\u9898\u76ee100\u90531.3ab-4ab+8ab-7ab+ab=______.
2.7x-(5x-5y)-y=______.
3.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______.
4.-7x2+6x+13x2-4x-5x2=______.
5.2y+(-2y+5)-(3y+2)=______.
6.(2x2-3xy+4y2)+(x2+2xy-3y2)=______.
7.2a-(3a-2b+2)+(3a-4b-1)=______.
8.-6x2-7x2+15x2-2x2=______.
9.2x-(x+3y)-(-x-y)-(x-y)=______.
10.2x+2y-[3x-2(x-y)]=______.
11.5-(1-x)-1-(x-1)=______.
12.( )+(4xy+7x2-y2)=10x2-xy.
13.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3.
14.\u5df2\u77e5A=x3-2x2+x-4,B=2x3-5x+3,\u8ba1\u7b97A+B=______.
15.\u5df2\u77e5A=x3-2x2+x-4,B=2x3-5x+3,\u8ba1\u7b97A-B=______.
16.\u82e5a=-0.2,b=0.5,\u4ee3\u6570\u5f0f-(|a2b|-|ab2|)\u7684\u503c\u4e3a______.
17.\u4e00\u4e2a\u591a\u9879\u5f0f\u51cf\u53bb3m4-m3-2m+5\u5f97-2m4-3m3-2m2-1,\u90a3\u4e48\u8fd9\u4e2a\u591a\u9879\u5f0f\u7b49\u4e8e______.
18.-(2x2-y2)-[2y2-(x2+2xy)]=______.
19.\u82e5-3a3b2\u4e0e5ax-1by+2\u662f\u540c\u7c7b\u9879,\u5219x=______,y=______.
20.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=______.
\u89e3\u6790\uff1a
1+1/2+1/6+...+1/90
=1+(1-1/2)+(1/2-1/3)+...+(1/9-1/10)
=1+1-1/10
=2-1/10
=19/10
91*17+17*9 37*142+142*63 27*129+129*73 71*112+112*29 72*143+143*28 11*118+118*89 72*111+111*28 85*56+56*15 22*28+28*78 72*33+33*28
64*147+147*36 98*52+52*2 6*79+79*94 72*30+30*28 23*80+80*77 62*156+156*38 36*55+55*64 27*165+165*73 95*152+152*5 0*42+42*100
8*128+128*92 68*104+104*32 52*157+157*48 49*11+11*51 35*118+118*65 87*5+5*13 81*36+36*19 50*6+6*50 56*47+47*44 30*101+101*70
40*117+117*60 71*113+113*29 32*70+70*68 85*43+43*15 28*49+49*72 26*6+6*74 66*25+25*34 79*77+77*21 98*44+44*2 89*78+78*11
6*72+72*94 79*55+55*21 86*70+70*14 50*103+103*50 7*71+71*93 50*93+93*50 69*16+16*31 44*129+129*56 79*86+86*21 36*121+121*64
56*60+60*44 49*156+156*51 37*106+106*63 50*65+65*50 69*11+11*31 48*73+73*52 31*88+88*69 88*148+148*12 82*107+107*18 87*154+154*13
24*11+11*76 15*145+145*85 22*120+120*78 78*1+1*22 37*132+132*63 88*145+145*12 45*164+164*55 30*151+151*70 99*43+43*1 93*82+82*7
43*154+154*57 15*150+150*85 50*144+144*50 39*10+10*61 43*45+45*57 82*68+68*18 92*38+38*8 22*119+119*78 13*56+56*87 94*164+164*6
97*54+54*3 37*68+68*63 76*105+105*24 48*102+102*52 96*152+152*4 43*31+31*57 97*43+43*3 93*4+4*7 28*1+1*72 65*122+122*35
绛旓細璇︾粏瑙ｇ瓟濡備笅锛
绛旓細绗竴棰橈細 5y²-锛坹-2锛(3y+1)-2(y+1)(y-5)=5y²-3y²-y+6y+2-2(y²-5y+y-5)=2y²+5y+2-2y²+8y+10=13y+12 鍥犱负y=-2 鎵浠13y+12=-26+12=-14 绗簩棰橈細锛2x+3y锛²-锛2x-y锛(2x+y)=4x²+12xy+9y²-4x...
绛旓細1.宸茬煡x+y=5,2x-y=1,鍖栫畝xy(x+y鐨勫钩鏂癸級-y鐨勫钩鏂(xy-x)+2x(x-y鐨勫钩鏂),骞舵眰瀹冧滑鐨勫.3.3ab-4ab+8ab-7ab+ab=___锛4锛7x-(5x-5y)-y=___锛5锛23a3bc2-15ab2c+8abc-24a3bc2-8abc=___锛6锛-7x2+6x+13x2-4x-5x2=___锛7锛2y+(-2y+5)-(3y+2)锛漘__锛11锛(...
绛旓細54*101+101*46 51*59+59*49 47*88+88*53 76*131+131*24 42*70+70*58 92*106+106*8 49*59+59*51 1*72+72*99 44*79+79*56 89*85+85*11 91*17+17*9 37*142+142*63 27*129+129*73 71*112+112*29 72*143+143*28 11*118...
绛旓細鍖栫畝寰楋細1/2(x+y+z)鏂+1/2(x-y-z)(x-y+z)-z(x+y)= 1/2[(x+y)鏂+2z(x+y)+z鏂筣+1/2[(x-y)鏂-z鏂筣-z(x+y)= 1/2(x+y)鏂+1/2(x-y)鏂=x鏂癸紜y鏂 鐢眡-y=6,xy=21寰楋紝x鏂癸紜y鏂癸紳锛坸-y锛夋柟锛2xy锛78 3銆乤^2-ab+2b^2=3 姹2ab-2a^2-4b^2-7鐨...
绛旓細1.宸茬煡x+y=5,2x-y=1锛鍖栫畝xy(x+y鐨勫钩鏂癸級-y鐨勫钩鏂(xy-x)+2x(x-y鐨勫钩鏂),骞舵眰瀹冧滑鐨勫笺3.3ab-4ab+8ab-7ab+ab=___锛4锛7x-(5x-5y)-y=___锛5锛23a3bc2-15ab2c+8abc-24a3bc2-8abc=___锛6锛-7x2+6x+13x2-4x-5x2=___锛7锛2y+(-2y+5)-(3y+2)锛漘__锛11锛...
绛旓細9.宸茬煡a²+a-1=0,姹備唬鏁板紡a³+2a²+5鐨勫.10.(a+2)鐨勪簩娆℃柟-(a-1)(a+1),鍏朵腑a锛3锛25 鍏堝寲绠鍐嶆眰鍊 11.锛圶-1)鐨勪簩娆℃柟+(x+3)(x-3)+(x-3)(x-1),鍏朵腑X鐨勪簩娆℃柟-2x=2 12.宸茬煡:a+b=12,a鐨勫钩鏂+b鐨勫钩鏂=74 姹俛b鐨勫 13.鍏堝寲绠,鍐嶆眰鍊 (4x-...
绛旓細鈶2a-锛3a-2b+2锛+锛3a-4b-1) =锛 锛=2a-3a+2b-2+3a-4b-1 =锛2-3+3锛塧+锛2-4锛塨+锛-2-1锛=2a-2b-3 鈶5-(1-x)-1-(x-1锛=锛 锛=5-1+x-1-x+1 =4 鈶2x-(x+3y)-(-x-y)-(x-y)=锛 锛=2x-x+3y+x+y-x+y =x+5y 鍒濅竴鐨 ...
绛旓細-10脳(-1)=7+10 =17 A-2B =(x³+x²-x+1)-2(-x³-x²+x+1)=x³+x²-x+1+2x³+2x²-2x-2 =3x³+3x²-3x-1 =3脳(-2)³+3脳(-2)²-3脳(-2)-1 =-24+12+6-1 =-7 涓嬫杩欑棰樹笉鐢ㄦ偓璧 ...
绛旓細3x^y-[2x^2y-(2xy-1/2 x^2)-4x^2]-xy =3x^y-(2x^2y-2xy+1/2 x^2-4x^2)-xy =3x^y-(2x^2y-2xy-7/2 x^2)-xy =3x^y-2x^2y+2xy+7/2 x^2-xy =x^2y+xy+7/2 x^2 =2^2*(1/3)+2*(1/3)+(7/2)*2^2 =4/3+2/3+14 =16 (7a^2n -2b^2m+1 +c)-...
