3ab-4ab+8ab-7ab+ab=______ï¼
2ï¼7x-(5x-5y)-y=______ï¼
3ï¼23a3bc2-15ab2c+8abc-24a3bc2-8abc=______ï¼
4ï¼-7x2+6x+13x2-4x-5x2=______ï¼
5ï¼2y+(-2y+5)-(3y+2)ï¼______ï¼
6ï¼(2x2-3xy+4y2)+(x2+2xy-3y2)=______ï¼
7ï¼2a-(3a-2b+2)+(3a-4b-1)=______ï¼
8ï¼-6x2-7x2+15x2-2x2ï¼______ï¼
9ï¼2x-(x+3y)-(-x-y)-(x-y)ï¼______ï¼
10ï¼2x+2y-[3x-2(x-y)]=______ï¼
11ï¼5-(1-x)-1-(x-1)=______ï¼
12ï¼( )+(4xy+7x2-y2)=10x2-xyï¼
13ï¼(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3ï¼
14ï¼å·²ç¥A=x3-2x2+x-4,B=2x3-5x+3,计ç®A+B=______ï¼
15ï¼å·²ç¥A=x3-2x2+x-4,B=2x3-5x+3,计ç®A-B=______ï¼
16ï¼è¥a=-0.2,b=0.5,代æ°å¼-(|a2b|-|ab2|)çå¼ä¸º______ï¼
17ï¼ä¸ä¸ªå¤é¡¹å¼åå»3m4-m3-2m+5å¾-2m4-3m3-2m2-1,é£ä¹è¿ä¸ªå¤é¡¹å¼çäº______ï¼
18ï¼-(2x2-y2)-[2y2-(x2+2xy)]=______ï¼
19ï¼è¥-3a3b2ä¸5ax-1by+2æ¯å类项,åx=______,y=______ï¼
20ï¼(-y+6+3y4-y3)-(2y2-3y3+y4-7)ï¼______ï¼ è¿æä¸äºé¢ ä¸ã1ãa+(2b-3c-4d)=_________ï¼
2ãa-(-2b-3c+4d)=________ï¼
3ã(m-n)-3(z-p)=________ï¼
4ã3x-[5x-(2x-1)]=________ï¼
5ã4x2-[6x-(5x-8)-x2]=___________ï¼
äºãåç®(28å)
1ã(1)(3x+5y)+(5x-7y)-2(2x-4y)ï¼
(2)5ab-{1ãa+(2b-3c-4d)=
2ãa-(-2b-3c+4d)=
3ã(m-n)-3(z-p)=
4ã3x-[5x-(2x-1)]=
5ã4x2-[6x-(5x-8)-x2]=
6ã(3x+5y)+(5x-7y)-2(2x-4y)ï¼
7ã5ab+[2a2b+(a2b-3ab)]-2a2b}
ä¸ãåç®åæ±å¼(16å)
(2x2-x-1)-(x2-x- )+3(x2-1 ),å
¶ä¸x=1 .
åã1ã7x-3y-4z=-(_________)ï¼
2ãa2-2ab-a-b=a2-2ab-(_________)ï¼
3ã5x3-4x2+2x-3=5x3-(_________)-3ï¼
4ãa3-a2b+ab2=-(_______)+ab2=a3-(________)ï¼
5ã5a2-6a+9b=5a2-3(_____)=-6a-(______)ï¼
6ãx3-3x2y+3xy2-y3=x3-3x2y-(_____)=x3-y3-(______)ï¼
äºã(1)(x3-4x2y+5xy2-3y3)-(-2xy2-4x3+x2y)ï¼
(2)ä¸ä¸ªå¤é¡¹å¼åå»3a4-a3+2a-1å¾5a4+3a2-7a+2,æ±è¿ä¸ªå¤é¡¹å¼.
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