就只要60题,每种30题,要符合初一的难度!快啊!!!!!我在线等!!!!!!最晚5:15!!!!求你们了!!!!!!一定要快!!!!最好是原创,而且一定要满60题!!!谢谢你们了!!!!!!好我会再加分的!!!!
我是人教版七年级上的 ....还有....是一元一次方程......
解方程
1)87x+2y=7733
20x+32y=4364
答案:x=87 y=82
2)44x+60y=6340
15x+42y=4122
答案:x=20 y=91
3)11x+74y=3548
71x+45y=4730
答案:x=40 y=42
4)53x+54y=3229
70x+43y=2877
答案:x=11 y=49
5)43x+9y=801
76x+16y=1420
答案:x=9 y=46
6)55x+32y=6161
45x+84y=10707
答案:x=55 y=98
7)47x+27y=5396
94x+55y=10870
答案:x=70 y=78
8)33x+49y=4237
92x+2y=6428
答案:x=69 y=40
9)0x+56y=3920
64x+90y=9244
答案:x=46 y=70
10)91x+8y=4696
51x+66y=5154
答案:x=48 y=41
11)76x+90y=12152
52x+0y=4004
答案:x=77 y=70
12)47x+55y=6777
19x+48y=4131
答案:x=81 y=54
13)99x+57y=6558
85x+46y=5563
答案:x=53 y=23
14)26x+73y=7814
69x+65y=8379
答案:x=31 y=96
15)78x+35y=6814
10x+52y=2394
答案:x=73 y=32
16)21x+34y=3444
30x+35y=4350
答案:x=96 y=42
17)76x+64y=6048
54x+78y=6444
答案:x=24 y=66
18)25x+78y=9164
72x+61y=11992
答案:x=92 y=88
19)57x+62y=7419
18x+71y=7125
答案:x=29 y=93
20)53x+16y=1665
0x+2y=122
答案:x=13 y=61
21)26x+88y=5346
18x+76y=4274
答案:x=77 y=38
22)45x+61y=3848
88x+91y=6450
答案:x=34 y=38
23)98x+42y=11088
4x+32y=2512
答案:x=84 y=68
24)18x+86y=9558
60x+43y=7737
答案:x=58 y=99
25)11x+96y=5708
66x+13y=1031
答案:x=4 y=59
26)53x+12y=3567
94x+69y=7233
答案:x=63 y=19
27)70x+16y=3508
63x+16y=3186
答案:x=46 y=18
28)0x+10y=940
66x+20y=4850
答案:x=45 y=94
29)39x+66y=7791
55x+22y=5159
答案:x=61 y=82
30)11x+74y=4537
12x+1y=405
答案:x=29 y=57
化简求值
3.3ab-4ab+8ab-7ab+ab=______.
4.7x-(5x-5y)-y=______.
5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______.
6.-7x2+6x+13x2-4x-5x2=______.
7.2y+(-2y+5)-(3y+2)=______.
11.(2x2-3xy+4y2)+(x2+2xy-3y2)=______.
12.2a-(3a-2b+2)+(3a-4b-1)=______.
13.-6x2-7x2+15x2-2x2=______.
14.2x-(x+3y)-(-x-y)-(x-y)=______.
16.2x+2y-[3x-2(x-y)]=______.
17.5-(1-x)-1-(x-1)=______.
18.( )+(4xy+7x2-y2)=10x2-xy.
19.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3.
21.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A+B=______.
22.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A-B=______.
23.若a=-0.2,b=0.5,代数式-(|a2b|-|ab2|)的值为______.
25.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______.
26.-(2x2-y2)-[2y2-(x2+2xy)]=______.
27.若-3a3b2与5ax-1by+2是同类项,则x=______,y=______.
28.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=______.
29.化简代数式4x2-[7x2-5x-3(1-2x+x2)]的结果是______.
30.2a-b2+c-d3=2a+( )-d3=2a-d3-( )=c-( ).
31.3a-(2a-3b)+3(a-2b)-b=______.
32.化简代数式x-[y-2x-(x+y)]等于______.
33.[5a2+( )a-7]+[( )a2-4a+( )]=a2+2a+1.
34.3x-[y-(2x+y)]=______.
35.化简|1-x+y|-|x-y|(其中x<0,y>0)等于______.
36.已知x≤y,x+y-|x-y|=______.
37.已知x<0,y<0,化简|x+y|-|5-x-y|=______.
38.4a2n-an-(3an-2a2n)=______.
39.若一个多项式加上-3x2y+2x2-3xy-4得
2x2y+3xy2-x2+2xy,
则这个多项式为______.
40.-5xm-xm-(-7xm)+(-3xm)=______.
41.当a=-1,b=-2时,
[a-(b-c)]-[-b-(-c-a)]=______.
43.当a=-1,b=1,c=-1时,
-[b-2(-5a)]-(-3b+5c)=______.
44.-2(3x+z)-(-6x)+(-5y+3z)=______.
45.-5an-an+1-(-7an+1)+(-3an)=______.
46.3a-(2a-4b-6c)+3(-2c+2b)=______.
48.9a2+[7a2-2a-(-a2+3a)]=______.
50.当2y-x=5时,5(x-2y)2-3(-x+2y)-100=______.
有理数混合运算
:(1)-5-9+3; (2)10-17+8;
(3)-3-4+19-11; (4)-8+12-16-23.
2.计算:
(1)-4.2+5.7-8.4+10; (2)6.1-3.7-4.9+1.8;
3.计算:
(1)(-36)-(-25)-(+36)+(+72); (2)(-8)-(-3)+(+5)-(+9);
(3) ; (4)-9+(-3 )+3 ;
4.计算:
(1)12-(-18)+(-7)-15;
(2)-40-28-(-19)+(-24)-(-32);
(3)4.7-(-8.9)-7.5+(-6);
答案:
1、(1)-11;(2)1;(3)1;(4)-35
2、(1)3.1;(2)-0.7;(3) ;(4)
3、(1)25;(2)-9;(3) ;(4)-9
4、(1)8;(2)-41;(3)0.1
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-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)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y
(1)-1+2-3+4-5+6-7;
(2)-50-28+(-24)-(-22);
(3)-19.8-(-20.3)-(+20.2)-10.8;
(4)0.25- +(-1 )-(+3 ).
8-4÷(-2); 12、-9+5×(-6)-12÷(-6)
14、-1-〔1-(1-0.6÷3)〕×〔2-(-3)×(-4)〕;
20、0÷(-4)-42-(-8)÷(-1)3;
21、-32-(-3) 2-(-3)3+(-1)6;
24、3×(-2)2+(-2×3)2+(-2+3)2;
34、(-12)÷4×(-6)÷2;
36、(-12)÷4×(-6)÷2;
离开初中太久了,不知道这些是不是你要的
1)87x+2y=7733
20x+32y=4364
答案:x=87 y=82
2)44x+60y=6340
15x+42y=4122
答案:x=20 y=91
3)11x+74y=3548
71x+45y=4730
答案:x=40 y=42
4)53x+54y=3229
70x+43y=2877
答案:x=11 y=49
5)43x+9y=801
76x+16y=1420
答案:x=9 y=46
6)55x+32y=6161
45x+84y=10707
答案:x=55 y=98
7)47x+27y=5396
94x+55y=10870
答案:x=70 y=78
8)33x+49y=4237
92x+2y=6428
答案:x=69 y=40
9)0x+56y=3920
64x+90y=9244
答案:x=46 y=70
10)91x+8y=4696
51x+66y=5154
答案:x=48 y=41
11)76x+90y=12152
52x+0y=4004
答案:x=77 y=70
12)47x+55y=6777
19x+48y=4131
答案:x=81 y=54
13)99x+57y=6558
85x+46y=5563
答案:x=53 y=23
14)26x+73y=7814
69x+65y=8379
答案:x=31 y=96
15)78x+35y=6814
10x+52y=2394
答案:x=73 y=32
16)21x+34y=3444
30x+35y=4350
答案:x=96 y=42
17)76x+64y=6048
54x+78y=6444
答案:x=24 y=66
18)25x+78y=9164
72x+61y=11992
答案:x=92 y=88
19)57x+62y=7419
18x+71y=7125
答案:x=29 y=93
20)53x+16y=1665
0x+2y=122
答案:x=13 y=61
21)26x+88y=5346
18x+76y=4274
答案:x=77 y=38
22)45x+61y=3848
88x+91y=6450
答案:x=34 y=38
23)98x+42y=11088
4x+32y=2512
答案:x=84 y=68
24)18x+86y=9558
60x+43y=7737
答案:x=58 y=99
25)11x+96y=5708
66x+13y=1031
答案:x=4 y=59
26)53x+12y=3567
94x+69y=7233
答案:x=63 y=19
27)70x+16y=3508
63x+16y=3186
答案:x=46 y=18
28)0x+10y=940
66x+20y=4850
答案:x=45 y=94
29)39x+66y=7791
55x+22y=5159
答案:x=61 y=82
30)11x+74y=4537
12x+1y=405
答案:x=29 y=57
化简求值
3.3ab-4ab+8ab-7ab+ab=______.
4.7x-(5x-5y)-y=______.
5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______.
6.-7x2+6x+13x2-4x-5x2=______.
7.2y+(-2y+5)-(3y+2)=______.
11.(2x2-3xy+4y2)+(x2+2xy-3y2)=______.
12.2a-(3a-2b+2)+(3a-4b-1)=______.
13.-6x2-7x2+15x2-2x2=______.
14.2x-(x+3y)-(-x-y)-(x-y)=______.
16.2x+2y-[3x-2(x-y)]=______.
17.5-(1-x)-1-(x-1)=______.
18.( )+(4xy+7x2-y2)=10x2-xy.
19.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3.
21.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A+B=______.
22.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A-B=______.
23.若a=-0.2,b=0.5,代数式-(|a2b|-|ab2|)的值为______.
25.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______.
26.-(2x2-y2)-[2y2-(x2+2xy)]=______.
27.若-3a3b2与5ax-1by+2是同类项,则x=______,y=______.
28.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=______.
29.化简代数式4x2-[7x2-5x-3(1-2x+x2)]的结果是______.
30.2a-b2+c-d3=2a+( )-d3=2a-d3-( )=c-( ).
31.3a-(2a-3b)+3(a-2b)-b=______.
32.化简代数式x-[y-2x-(x+y)]等于______.
33.[5a2+( )a-7]+[( )a2-4a+( )]=a2+2a+1.
34.3x-[y-(2x+y)]=______.
35.化简|1-x+y|-|x-y|(其中x<0,y>0)等于______.
36.已知x≤y,x+y-|x-y|=______.
37.已知x<0,y<0,化简|x+y|-|5-x-y|=______.
38.4a2n-an-(3an-2a2n)=______.
39.若一个多项式加上-3x2y+2x2-3xy-4得
2x2y+3xy2-x2+2xy,
则这个多项式为______.
40.-5xm-xm-(-7xm)+(-3xm)=______.
41.当a=-1,b=-2时,
[a-(b-c)]-[-b-(-c-a)]=______.
43.当a=-1,b=1,c=-1时,
-[b-2(-5a)]-(-3b+5c)=______.
44.-2(3x+z)-(-6x)+(-5y+3z)=______.
45.-5an-an+1-(-7an+1)+(-3an)=______.
46.3a-(2a-4b-6c)+3(-2c+2b)=______.
48.9a2+[7a2-2a-(-a2+3a)]=______.
50.当2y-x=5时,5(x-2y)2-3(-x+2y)-100=______.
有理数混合运算
:(1)-5-9+3; (2)10-17+8;
(3)-3-4+19-11; (4)-8+12-16-23.
2.计算:
(1)-4.2+5.7-8.4+10; (2)6.1-3.7-4.9+1.8;
3.计算:
(1)(-36)-(-25)-(+36)+(+72); (2)(-8)-(-3)+(+5)-(+9);
(3) ; (4)-9+(-3 )+3 ;
4.计算:
(1)12-(-18)+(-7)-15;
(2)-40-28-(-19)+(-24)-(-32);
(3)4.7-(-8.9)-7.5+(-6);
答案:
1、(1)-11;(2)1;(3)1;(4)-35
2、(1)3.1;(2)-0.7;(3) ;(4)
3、(1)25;(2)-9;(3) ;(4)-9
4、(1)8;(2)-41;(3)0.1
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-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)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y
(1)-1+2-3+4-5+6-7;
(2)-50-28+(-24)-(-22);
(3)-19.8-(-20.3)-(+20.2)-10.8;
(4)0.25- +(-1 )-(+3 ).
8-4÷(-2); 12、-9+5×(-6)-12÷(-6)
14、-1-〔1-(1-0.6÷3)〕×〔2-(-3)×(-4)〕;
20、0÷(-4)-42-(-8)÷(-1)3;
21、-32-(-3) 2-(-3)3+(-1)6;
24、3×(-2)2+(-2×3)2+(-2+3)2;
34、(-12)÷4×(-6)÷2;
36、(-12)÷4×(-6)÷2;
离开初中太久了,不知道这些是不是你要的
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第1个回答 2019-06-05
解方程
1)87x+2y=7733
20x+32y=4364
答案:x=87y=82
2)44x+60y=6340
15x+42y=4122
答案:x=20y=91
3)11x+74y=3548
71x+45y=4730
答案:x=40y=42
4)53x+54y=3229
70x+43y=2877
答案:x=11y=49
5)43x+9y=801
76x+16y=1420
答案:x=9y=46
6)55x+32y=6161
45x+84y=10707
答案:x=55y=98
7)47x+27y=5396
94x+55y=10870
答案:x=70y=78
8)33x+49y=4237
92x+2y=6428
答案:x=69y=40
9)0x+56y=3920
64x+90y=9244
答案:x=46y=70
10)91x+8y=4696
51x+66y=5154
答案:x=48y=41
11)76x+90y=12152
52x+0y=4004
答案:x=77y=70
12)47x+55y=6777
19x+48y=4131
答案:x=81y=54
13)99x+57y=6558
85x+46y=5563
答案:x=53y=23
14)26x+73y=7814
69x+65y=8379
答案:x=31y=96
15)78x+35y=6814
10x+52y=2394
答案:x=73y=32
16)21x+34y=3444
30x+35y=4350
答案:x=96y=42
17)76x+64y=6048
54x+78y=6444
答案:x=24y=66
18)25x+78y=9164
72x+61y=11992
答案:x=92y=88
19)57x+62y=7419
18x+71y=7125
答案:x=29y=93
20)53x+16y=1665
0x+2y=122
答案:x=13y=61
21)26x+88y=5346
18x+76y=4274
答案:x=77y=38
22)45x+61y=3848
88x+91y=6450
答案:x=34y=38
23)98x+42y=11088
4x+32y=2512
答案:x=84y=68
24)18x+86y=9558
60x+43y=7737
答案:x=58y=99
25)11x+96y=5708
66x+13y=1031
答案:x=4y=59
26)53x+12y=3567
94x+69y=7233
答案:x=63y=19
27)70x+16y=3508
63x+16y=3186
答案:x=46y=18
28)0x+10y=940
66x+20y=4850
答案:x=45y=94
29)39x+66y=7791
55x+22y=5159
答案:x=61y=82
30)11x+74y=4537
12x+1y=405
答案:x=29y=57
化简求值
3.3ab-4ab+8ab-7ab+ab=______.
4.7x-(5x-5y)-y=______.
5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______.
6.-7x2+6x+13x2-4x-5x2=______.
7.2y+(-2y+5)-(3y+2)=______.
11.(2x2-3xy+4y2)+(x2+2xy-3y2)=______.
12.2a-(3a-2b+2)+(3a-4b-1)=______.
13.-6x2-7x2+15x2-2x2=______.
14.2x-(x+3y)-(-x-y)-(x-y)=______.
16.2x+2y-[3x-2(x-y)]=______.
17.5-(1-x)-1-(x-1)=______.
18.()+(4xy+7x2-y2)=10x2-xy.
19.(4xy2-2x2y)-()=x3-2x2y+4xy2+y3.
21.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A+B=______.
22.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A-B=______.
23.若a=-0.2,b=0.5,代数式-(|a2b|-|ab2|)的值为______.
25.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______.
26.-(2x2-y2)-[2y2-(x2+2xy)]=______.
27.若-3a3b2与5ax-1by+2是同类项,则x=______,y=______.
28.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=______.
29.化简代数式4x2-[7x2-5x-3(1-2x+x2)]的结果是______.
30.2a-b2+c-d3=2a+()-d3=2a-d3-()=c-().
31.3a-(2a-3b)+3(a-2b)-b=______.
32.化简代数式x-[y-2x-(x+y)]等于______.
33.[5a2+()a-7]+[()a2-4a+()]=a2+2a+1.
34.3x-[y-(2x+y)]=______.
35.化简|1-x+y|-|x-y|(其中x<0,y>0)等于______.
36.已知x≤y,x+y-|x-y|=______.
37.已知x<0,y<0,化简|x+y|-|5-x-y|=______.
38.4a2n-an-(3an-2a2n)=______.
39.若一个多项式加上-3x2y+2x2-3xy-4得
2x2y+3xy2-x2+2xy,
则这个多项式为______.
40.-5xm-xm-(-7xm)+(-3xm)=______.
41.当a=-1,b=-2时,
[a-(b-c)]-[-b-(-c-a)]=______.
43.当a=-1,b=1,c=-1时,
-[b-2(-5a)]-(-3b+5c)=______.
44.-2(3x+z)-(-6x)+(-5y+3z)=______.
45.-5an-an+1-(-7an+1)+(-3an)=______.
46.3a-(2a-4b-6c)+3(-2c+2b)=______.
48.9a2+[7a2-2a-(-a2+3a)]=______.
50.当2y-x=5时,5(x-2y)2-3(-x+2y)-100=______.
有理数混合运算
:(1)-5-9+3;(2)10-17+8;
(3)-3-4+19-11;(4)-8+12-16-23.
2.计算:
(1)-4.2+5.7-8.4+10;(2)6.1-3.7-4.9+1.8;
3.计算:
(1)(-36)-(-25)-(+36)+(+72);(2)(-8)-(-3)+(+5)-(+9);
(3);(4)-9+(-3)+3;
4.计算:
(1)12-(-18)+(-7)-15;
(2)-40-28-(-19)+(-24)-(-32);
(3)4.7-(-8.9)-7.5+(-6);
答案:
1、(1)-11;(2)1;(3)1;(4)-35
2、(1)3.1;(2)-0.7;(3);(4)
3、(1)25;(2)-9;(3);(4)-9
4、(1)8;(2)-41;(3)0.1
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-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)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y
(1)-1+2-3+4-5+6-7;
(2)-50-28+(-24)-(-22);
(3)-19.8-(-20.3)-(+20.2)-10.8;
(4)0.25-+(-1)-(+3).
8-4÷(-2);12、-9+5×(-6)-12÷(-6)
14、-1-〔1-(1-0.6÷3)〕×〔2-(-3)×(-4)〕;
20、0÷(-4)-42-(-8)÷(-1)3;
21、-32-(-3)2-(-3)3+(-1)6;
24、3×(-2)2+(-2×3)2+(-2+3)2;
34、(-12)÷4×(-6)÷2;
36、(-12)÷4×(-6)÷2;
离开初中太久了,不知道这些是不是你要的
1)87x+2y=7733
20x+32y=4364
答案:x=87y=82
2)44x+60y=6340
15x+42y=4122
答案:x=20y=91
3)11x+74y=3548
71x+45y=4730
答案:x=40y=42
4)53x+54y=3229
70x+43y=2877
答案:x=11y=49
5)43x+9y=801
76x+16y=1420
答案:x=9y=46
6)55x+32y=6161
45x+84y=10707
答案:x=55y=98
7)47x+27y=5396
94x+55y=10870
答案:x=70y=78
8)33x+49y=4237
92x+2y=6428
答案:x=69y=40
9)0x+56y=3920
64x+90y=9244
答案:x=46y=70
10)91x+8y=4696
51x+66y=5154
答案:x=48y=41
11)76x+90y=12152
52x+0y=4004
答案:x=77y=70
12)47x+55y=6777
19x+48y=4131
答案:x=81y=54
13)99x+57y=6558
85x+46y=5563
答案:x=53y=23
14)26x+73y=7814
69x+65y=8379
答案:x=31y=96
15)78x+35y=6814
10x+52y=2394
答案:x=73y=32
16)21x+34y=3444
30x+35y=4350
答案:x=96y=42
17)76x+64y=6048
54x+78y=6444
答案:x=24y=66
18)25x+78y=9164
72x+61y=11992
答案:x=92y=88
19)57x+62y=7419
18x+71y=7125
答案:x=29y=93
20)53x+16y=1665
0x+2y=122
答案:x=13y=61
21)26x+88y=5346
18x+76y=4274
答案:x=77y=38
22)45x+61y=3848
88x+91y=6450
答案:x=34y=38
23)98x+42y=11088
4x+32y=2512
答案:x=84y=68
24)18x+86y=9558
60x+43y=7737
答案:x=58y=99
25)11x+96y=5708
66x+13y=1031
答案:x=4y=59
26)53x+12y=3567
94x+69y=7233
答案:x=63y=19
27)70x+16y=3508
63x+16y=3186
答案:x=46y=18
28)0x+10y=940
66x+20y=4850
答案:x=45y=94
29)39x+66y=7791
55x+22y=5159
答案:x=61y=82
30)11x+74y=4537
12x+1y=405
答案:x=29y=57
化简求值
3.3ab-4ab+8ab-7ab+ab=______.
4.7x-(5x-5y)-y=______.
5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______.
6.-7x2+6x+13x2-4x-5x2=______.
7.2y+(-2y+5)-(3y+2)=______.
11.(2x2-3xy+4y2)+(x2+2xy-3y2)=______.
12.2a-(3a-2b+2)+(3a-4b-1)=______.
13.-6x2-7x2+15x2-2x2=______.
14.2x-(x+3y)-(-x-y)-(x-y)=______.
16.2x+2y-[3x-2(x-y)]=______.
17.5-(1-x)-1-(x-1)=______.
18.()+(4xy+7x2-y2)=10x2-xy.
19.(4xy2-2x2y)-()=x3-2x2y+4xy2+y3.
21.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A+B=______.
22.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A-B=______.
23.若a=-0.2,b=0.5,代数式-(|a2b|-|ab2|)的值为______.
25.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______.
26.-(2x2-y2)-[2y2-(x2+2xy)]=______.
27.若-3a3b2与5ax-1by+2是同类项,则x=______,y=______.
28.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=______.
29.化简代数式4x2-[7x2-5x-3(1-2x+x2)]的结果是______.
30.2a-b2+c-d3=2a+()-d3=2a-d3-()=c-().
31.3a-(2a-3b)+3(a-2b)-b=______.
32.化简代数式x-[y-2x-(x+y)]等于______.
33.[5a2+()a-7]+[()a2-4a+()]=a2+2a+1.
34.3x-[y-(2x+y)]=______.
35.化简|1-x+y|-|x-y|(其中x<0,y>0)等于______.
36.已知x≤y,x+y-|x-y|=______.
37.已知x<0,y<0,化简|x+y|-|5-x-y|=______.
38.4a2n-an-(3an-2a2n)=______.
39.若一个多项式加上-3x2y+2x2-3xy-4得
2x2y+3xy2-x2+2xy,
则这个多项式为______.
40.-5xm-xm-(-7xm)+(-3xm)=______.
41.当a=-1,b=-2时,
[a-(b-c)]-[-b-(-c-a)]=______.
43.当a=-1,b=1,c=-1时,
-[b-2(-5a)]-(-3b+5c)=______.
44.-2(3x+z)-(-6x)+(-5y+3z)=______.
45.-5an-an+1-(-7an+1)+(-3an)=______.
46.3a-(2a-4b-6c)+3(-2c+2b)=______.
48.9a2+[7a2-2a-(-a2+3a)]=______.
50.当2y-x=5时,5(x-2y)2-3(-x+2y)-100=______.
有理数混合运算
:(1)-5-9+3;(2)10-17+8;
(3)-3-4+19-11;(4)-8+12-16-23.
2.计算:
(1)-4.2+5.7-8.4+10;(2)6.1-3.7-4.9+1.8;
3.计算:
(1)(-36)-(-25)-(+36)+(+72);(2)(-8)-(-3)+(+5)-(+9);
(3);(4)-9+(-3)+3;
4.计算:
(1)12-(-18)+(-7)-15;
(2)-40-28-(-19)+(-24)-(-32);
(3)4.7-(-8.9)-7.5+(-6);
答案:
1、(1)-11;(2)1;(3)1;(4)-35
2、(1)3.1;(2)-0.7;(3);(4)
3、(1)25;(2)-9;(3);(4)-9
4、(1)8;(2)-41;(3)0.1
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-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)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y
(1)-1+2-3+4-5+6-7;
(2)-50-28+(-24)-(-22);
(3)-19.8-(-20.3)-(+20.2)-10.8;
(4)0.25-+(-1)-(+3).
8-4÷(-2);12、-9+5×(-6)-12÷(-6)
14、-1-〔1-(1-0.6÷3)〕×〔2-(-3)×(-4)〕;
20、0÷(-4)-42-(-8)÷(-1)3;
21、-32-(-3)2-(-3)3+(-1)6;
24、3×(-2)2+(-2×3)2+(-2+3)2;
34、(-12)÷4×(-6)÷2;
36、(-12)÷4×(-6)÷2;
离开初中太久了,不知道这些是不是你要的