初一上册数学整式的加减计算题（重点难题），答案也要啊，快快，不要忘了是计算题 七年级上册数学计算题150道（带过程和答案）
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1\u7edd\u5bf9\u503c\u5927\u4e8e1\u800c\u5c0f\u4e8e4\u7684\u6574\u6570\u6709_________\uff0c\u5176\u548c\u4e3a______\u3002
2\u5df2\u77e5\u2502x-3\u2502+\u2502y+2\u2502=0 \uff0c\u5219x+y=\uff08 \uff09
3\u82e5a\u2502b\u2502\uff0c\u5219a-b___0.
4\u5316\u7b80\uff1a\u25023-\u03c0\u2502=____\u30025\u3001\u5f53\u65f6\uff0c\u5316\u7b80\u7684\u7ed3\u679c\u662f
6)1-2+3-4+5-6+\u2026+2001-2002\u7684\u503c\u662f_____.
7\u3001\u4ed4\u7ec6\u89c2\u5bdf\u3001\u601d\u8003\u4e0b\u9762\u4e00\u5217\u6570\u6709\u54ea\u4e9b\u89c4\u5f8b\uff1a
\uff0d2 \uff0c4 \uff0c\uff0d8 \uff0c16 \uff0c\uff0d32 \uff0c64 \uff0c\u2026\u2026\u7136\u540e\u586b\u51fa\u4e0b\u9762\u4e24\u7a7a\uff1a
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.
8\u3001
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9\u3001\u5df2\u77e5\uff0c\u5219 \u3002
11\u82e5a+b<0\uff0c\u4e14ab<0\uff0c\u5219\uff08 \uff09
A: a>0,b>0 B:a<0,b<0
C:a, b\u5f02\u53f7\u4e14\u8d1f\u6570\u7684\u7edd\u5bf9\u503c\u5927 D:a,b\u5f02\u53f7\u4e14\u6b63\u6570\u7684\u7edd\u5bf9\u503c\u5927
12\u5982\u679c\u2502a\u2502=-a\uff0c\u4e0b\u5217\u6210\u7acb\u7684\u662f\uff08 \uff0913\u3001\u82e5\u2502\uff0da\u2502=5,\u5219a=
A:a>0 B:a<0
C:a\u22650 D:a\u22640
14\u6709\u7406\u6570a \u3001b\u5728\u6570\u8f74\u4e0a\u7684\u5bf9\u5e94\u7684\u4f4d\u7f6e\u5982\u56fe\u6240\u793a\uff1a\u5219\uff08 \uff09
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A:a+b0
C:a+b=0 D:a-b>0
1. \uff08-8\uff09+10+2+\uff08-1\uff09 2. \uff08-18.65\uff09+\uff08-6.15\uff09+18.15+6.15
3. -0.25\u00f7\uff08-0.5\uff09+\uff08\u516b\u5206\u4e4b\u4e00 - \u4e8c\u5206\u4e4b\u4e00\uff09x\uff08-1\uff09
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5\u3001
4. -10+8x\uff08-2\uff09-\uff08-4\uff09x\uff08-3\uff09
5. [(\u516b\u5206\u4e4b\u4e94-\u516d\u5206\u4e4b\u4e00+\u5341\u4e8c\u5206\u4e4b\u4e03)x24-\u4e00\u53c8\u5341\u4e09\u5206\u4e4b\u4e8c]\u00f75
6) \uff0d81\uff09\u00f72\u00d7\uff08\uff0d\uff09\u00f7\uff08\uff0d16\uff09
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15\u5df2\u77e5\u2502a\u2502=3\uff0c\u2502b\u2502=4\uff0c\u4e14a>b\uff0c\u6c42a+b\u7684\u503c\u3002
16\u3001\u5df2\u77e5|a|=3\uff0c|b|=5\uff0c\u4e14a<b\uff0c\u5219a-b\u7684\u503c\u4e3a \u3002
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1\u3001\u7528\u4ee3\u6570\u5f0f\u8868\u793aa\u4e0e-5\u7684\u5dee\u76842\u500d\u662f( )
A\u3001a-(-5)\u00d72 B\u3001a+(-5)\u00d72 C\u30012(a-5\uff09 D\u30012(a+5\uff09
2\u3001\u7528\u5b57\u6bcd\u8868\u793a\u6709\u7406\u6570\u7684\u51cf\u6cd5\u6cd5\u5219\u662f\uff08 \uff09
A\u3001a-b=a+b B\u3001a-b=a+(-b) C\u3001a-b=-a+b D\u3001a-b=a-(-b)
3\u3001\u67d0\u73ed\u5171\u6709\u5b66\u751fx\u4eba\uff0c\u5176\u4e2d\u5973\u751f\u4eba\u6570\u536035\uff05\uff0c\u90a3\u4e48\u7537\u751f\u4eba\u6570\u662f\uff08 \uff09
A\u300135\uff05x B\u3001(1\uff0d35\uff05)x C\u3001 D\u3001
4\u3001\u82e5\u4ee3\u6570\u5f0f \u4e0e\u4ee3\u6570\u5f0f \u662f\u540c\u7c7b\u9879\uff0c\u5219 \u7684\u503c\u662f\uff08 \uff09
A\u30019 B\u3001 C\u30014 D\u3001
5\u3001\u628a-x-x\u5408\u5e76\u540c\u7c7b\u9879\u5f97\uff08 \uff09
A\u30010 B\u3001-2 C\u3001-2x D\u3001-2x2
6\u3001\u4e00\u4e2a\u4e24\u4f4d\u6570\uff0c\u5341\u4f4d\u4e0a\u7684\u6570\u5b57\u662fx\uff0c\u4e2a\u4f4d\u4e0a\u7684\u6570\u5b57\u662fy\uff0c\u5982\u679c\u628a\u5341\u4f4d\u4e0a\u7684\u6570\u4e0e\u4e2a\u4f4d\u4e0a\u7684\u6570\u5bf9\u8c03\uff0c\u6240\u5f97\u7684\u4e24\u4f4d\u6570\u662f\uff08 \uff09
A\u3001yx B\u3001y+x C\u300110y+x D\u300110x+y
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7\u3001\u5982\u679c\u4ee3\u6570\u5f0f\u7684\u503c\u4e3a7\uff0c\u90a3\u4e48\u4ee3\u6570\u5f0f\u7684\u503c\u7b49\u4e8e\uff08 \uff09
A\u30012 B\u30013 C\u3001 D\u30014
8\u3001\u4e0b\u9762\u7684\u5f0f\u5b50\uff0c\u6b63\u786e\u7684\u662f\uff08 \uff09
A\u30013a2+5a2=8a4 B\u30015a2b-6ab2=-ab2
C\u30016xy-9yx=-3xy D\u30012x+3y=5xy
9\u3001\u4e00\u4e2a\u591a\u9879\u5f0f\u52a0\u4e0ax2y-3xy2\u5f972x2y-xy2\uff0c\u5219\u8fd9\u4e2a\u591a\u9879\u5f0f\u662f\uff08 \uff09
A\u30013x2y-4xy2\uff1b B\u3001x2y-4xy2\uff1b C\u3001x2y+2xy2\uff1b D\u3001-x2y-2xy2
10\u3001\u82e5A=x2\uff0d5x\uff0b2\uff0cB=x2\uff0d5x-6\uff0c\u5219A\u4e0eB\u7684\u5927\u5c0f\u5173\u7cfb\u662f\uff08 \uff09
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11\u3001\u5355\u9879\u5f0f\u7684\u7cfb\u6570\u662f______\uff0c\u6b21\u6570\u662f______\uff1b
12\u3001\u662f \u6b21 \u9879\u5f0f\uff0c\u5b83\u7684\u9879\u5206\u522b\u662f \uff0c
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13\u3001\u4e3a\u9f13\u52b1\u8282\u7ea6\u7528\u7535\uff0c\u67d0\u5730\u5bf9\u5c45\u6c11\u7528\u6237\u7528\u7535\u6536\u8d39\u6807\u51c6\u4f5c\u5982\u4e0b\u89c4\u5b9a\uff1a\u6bcf\u6237\u6bcf\u6708\u7528\u7535\u5982\u679c\u4e0d\u8d85\u8fc7100\u5ea6\uff0c\u90a3\u4e48\u6bcf\u5ea6\u7535\u4ef7\u6309a\u5143\u6536\u8d39\uff1b\u5982\u679c\u8d85\u8fc7100\u5ea6\uff0c\u90a3\u4e48\u8d85\u8fc7\u90e8\u5206\u6bcf\u5ea6\u7535\u4ef7\u6309b\u5143\u6536\u8d39\u3002\u67d0\u6237\u5c45\u6c11\u5728\u4e00\u4e2a\u6708\u5185\u7528\u7535160\u5ea6\uff0c\u4ed6\u8fd9\u4e2a\u6708\u5e94\u7f34\u7eb3\u7535\u8d39\u662f
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14\u3001\u4e09\u4e2a\u8fde\u7eed\u5076\u6570\u4e2d\uff0c2n\u662f\u6700\u5c0f\u7684\u4e00\u4e2a\uff0c\u8fd9\u4e09\u4e2a\u6570\u7684\u548c\u4e3a______ _\uff1b
15\u3001\u5982\u56fe1\u662f\u5c0f\u660e\u7528\u706b\u67f4\u642d\u76841\u6761\u30012\u6761\u30013\u6761\u201c\u91d1\u9c7c\u201d\uff0c\u5219\u642d\u6761\u201c\u91d1\u9c7c\u201d\u9700\u8981\u706b\u67f4 \u6839\uff0e
16\u3001\u6839\u636e\u5982\u56fe\u6240\u793a\u7684\u7a0b\u5e8f\u8ba1\u7b97\uff0c
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17\u7b2c\u4e00\u7ec4\u3001\u5316\u7b80(1) 7-3x-4x2+4x-8x2-15 (2) 2(2a2-9b)-3(\uff0d4a2+b)
(3) 8x2-[-3x-(2x2-7x-5)+3]+4x
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1) (2)
(3) (4)
(5) (6)
18\u3001\u5148\u5316\u7b80\uff0c\u540e\u6c42\u503c\uff1b
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3\uff09. ;
8\u3001\u5df2\u77e5x+4y=\uff0d1\uff0cxy=5\uff0c\u6c42(6xy\uff0b7y)\uff0b[8x\uff0d(5xy\uff0dy\uff0b6x)]\u7684\u503c.
\u82e5a3\uff0bb3=35\uff0ca2b\uff0dab2=\uff0d6\uff0c\u5219(a3\uff0db3)\uff0b(3ab2\uff0da2b)\uff0d2(ab2\uff0db3)\u7684\u503c\u662f\u591a\u5c11\uff1f
31\u3001\u82e52x\uff0b5y\uff0b4z=6\uff0c3x\uff0by\uff0d7z=\uff0d4\uff0c\u90a3\u4e48x\uff0by\uff0dz\u7684\u503c\u662f\u591a\u5c11\uff1f
19\u3001\u6709\u8fd9\u6837\u4e00\u9053\u9898\uff0c\u8ba1\u7b97\u7684\u503c\uff0c\u5176\u4e2d
x=0.25\uff0cy=-1\uff1b\u7532\u540c\u5b66\u628a\u201cx=0.25\u201d\uff0c\u9519\u6284\u6210\u201cx=-0.25\u201d,\u4f46\u4ed6\u7684\u8ba1\u7b97\u7ed3\u679c\u4e5f\u662f\u6b63\u786e\u7684\uff0c\u4f60\u8bf4\u8fd9\u662f\u4e3a\u4ec0\u4e48\uff1f
18\uff0e\uff086\u5206\uff09\u5982\u56fe\u6240\u793a\uff0c\u5728\u4e0b\u9762\u7531\u706b\u67f4\u68d2\u62fc\u51fa\u7684\u4e00\u7cfb\u5217\u7684\u56fe\u5f62\u4e2d\uff0c\u7b2cn\u4e2a\u56fe\u5f62\u7531n\u4e2a\u6b63\u65b9\u5f62\u7ec4\u6210\uff0e
\uff081\uff09\u7b2c2\u4e2a\u56fe\u5f62\u4e2d\uff0c\u706b\u67f4\u68d2\u7684\u6839\u6570\u662f________\uff1b
\uff082\uff09\u7b2c3\u4e2a\u56fe\u5f62\u4e2d\uff0c\u706b\u67f4\u68d2\u7684\u6839\u6570\u662f________\uff1b
\uff083\uff09\u7b2c4\u4e2a\u56fe\u5f62\u4e2d\uff0c\u706b\u67f4\u68d2\u7684\u6839\u6570\u662f_______\uff1b
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19\uff0e\uff088\u5206\uff09\u6709\u8fd9\u6837\u4e00\u9053\u9898\uff1a\u201c\u5f53a=2009\uff0cb=\u20142010\u65f6\uff0c\u6c42\u591a\u9879\u5f0f
+2010\u7684\u503c\uff0e\u201d
\u5c0f\u660e\u8bf4\uff1a\u672c\u9898\u4e2da=2009\uff0cb=\u20142010\u662f\u591a\u4f59\u7684\u6761\u4ef6\uff1b\u5c0f\u5f3a\u9a6c\u4e0a\u53cd\u5bf9\u8bf4\uff1a\u8fd9\u4e0d\u53ef\u80fd\uff0c\u591a\u9879\u5f0f\u4e2d\u542b\u6709\u548c\uff0c\u4e0d\u7ed9\u51fa\u7684\u503c\u600e\u4e48\u80fd\u6c42\u51fa\u591a\u9879\u5f0f\u7684\u503c\u5462\uff1f
\u4f60\u540c\u610f\u54ea\u540d\u540c\u5b66\u7684\u89c2\u70b9\uff1f\u8bf7\u8bf4\u660e\u7406\u7531\uff0e
20\uff0e\uff088\u5206\uff09\u4e00\u4e2a\u4e09\u89d2\u5f62\u4e00\u8fb9\u957f\u4e3aa+b\uff0c\u53e6\u4e00\u8fb9\u957f\u6bd4\u8fd9\u6761\u8fb9\u5927b\uff0c\u7b2c\u4e09\u8fb9\u957f\u6bd4\u8fd9\u6761\u8fb9\u5c0fa\u2014b\uff0e
\uff081\uff09\u6c42\u8fd9\u4e2a\u4e09\u89d2\u5f62\u7684\u5468\u957f\uff1b\uff082\uff09\u82e5a=5\uff0cb=3\uff0c\u6c42\u4e09\u89d2\u5f62\u5468\u957f\u7684\u503c\uff0e
\u56db\u3001\u62d3\u5e7f\u63a2\u7d22\uff08\u517116\u5206\uff09
21\uff0e\uff088\u5206\uff09\u6709\u4e00\u4e32\u5355\u9879\u5f0f\uff1ax\uff0c-2x2\uff0c3x3\uff0c-4x4\uff0c\u2026\u2026\uff0c-10x10\uff0c\u2026\u2026
\uff081\uff09\u8bf7\u4f60\u5199\u51fa\u7b2c100\u4e2a\u5355\u9879\u5f0f\uff1b\uff082\uff09\u8bf7\u4f60\u5199\u51fa\u7b2cn\u4e2a\u5355\u9879\u5f0f\uff0e
22\uff0e\uff088\u5206\uff09\u5982\u56fe\u6240\u793a\uff0c\u8bf7\u4f60\u63a2\u7d22\u6b63\u65b9\u5f62\u7684\u4e2a\u6570\u4e0e\u7b49\u8170\u4e09\u89d2\u5f62\u7684\u4e2a\u6570\u4e4b\u95f4\u7684\u5173\u7cfb\uff0e
\u6b63\u65b9\u5f62\u4e2a\u6570
1
2
3
4
\u2026
n
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\uff081\uff09\u7167\u8fd9\u6837\u7684\u753b\u6cd5\uff0c\u5982\u679c\u753b15\u4e2a\u6b63\u65b9\u5f62\uff0c\u53ef\u4ee5\u5f97_______\u4e2a\u7b49\u8170\u4e09\u89d2\u5f62\uff1b
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2.1-2.2\u6d4b\u8bd5B
1\uff0e\uff087\u5206\uff09\u5df2\u77e5x2\u2014xy=21\uff0cxy-y2=\u201412\uff0c\u5206\u522b\u6c42\u5f0f\u5b50x2-y2\u4e0ex2\u20142xy+y2\u7684\u503c\uff0e
2\uff0e\uff087\u5206\uff09\u540c\u4e00\u65f6\u523b\u7684\u5317\u4eac\u65f6\u95f4\u3001\u5df4\u9ece\u65f6\u95f4\u3001\u4e1c\u4eac\u65f6\u95f4\u5982\u56fe\u6240\u793a\uff0e
(1)\u8bbe\u5317\u4eac\u65f6\u95f4\u4e3a\uff0c\u5206\u522b\u7528\u4ee3\u6570\u5f0f\u8868\u793a\u540c\u4e00\u65f6\u523b\u7684\u5df4\u9ece\u65f6\u95f4\u548c\u4e1c\u4eac\u65f6\u95f4\uff1b
(2)2001\u5e747\u670813\u65e5\uff0c\u5317\u4eac\u65f6\u95f422\uff1a08\uff0c\u56fd\u9645\u5965\u59d4\u4f1a\u4e3b\u5e2d\u8428\u9a6c\u5170\u5947\u5ba3\u5e03\uff0c\u5317\u4eac\u83b7\u5f972008\u5e74\u7b2c29\u5c4a\u590f\u5b63\u5965\u8fd0\u4f1a\u7684\u4e3b\u529e\u6743\uff0e\u95ee\u8fd9\u4e00\u65f6\u523b\u8d29\u5df4\u9ece\u65f6\u95f4\u3001\u4e1c\u4eac\u65f6\u95f4\u5206\u522b\u4e3a\u51e0\u65f6\uff1f
3\uff0e\uff088\u5206\uff09\u6309\u7167\u4e0b\u5217\u6b65\u9aa4\u505a\u4e00\u505a\uff1a
\uff081\uff09\u4efb\u610f\u5199\u4e00\u4e2a\u4e24\u4f4d\u6570\uff1b\uff082\uff09\u4ea4\u6362\u8fd9\u4e2a\u4e24\u4f4d\u6570\u7684\u5341\u4f4d\u6570\u5b57\u548c\u4e2a\u4f4d\u6570\u5b57\uff0c\u5f97\u5230\u4e00\u4e2a\u65b0\u6570\uff1b
\uff083\uff09\u6c42\u8fd9\u4e24\u4e2a\u4e24\u4f4d\u6570\u7684\u5dee\uff0e
\u518d\u5199\u51e0\u4e2a\u4e24\u4f4d\u6570\u91cd\u590d\u4e0a\u9762\u7684\u8fc7\u7a0b\uff0c\u8fd9\u4e9b\u5dee\u6709\u4ec0\u4e48\u89c4\u5f8b\uff1f\u8fd9\u4e2a\u89c4\u5f8b\u5bf9\u4efb\u610f\u4e00\u4e2a\u4e24\u4f4d\u6570\u90fd\u6210\u7acb\u5417\uff1f\u4e3a\u4ec0\u4e48\uff1f
20\u3001\u201c\u5341\u4e00\u201d\u9ec4\u91d1\u5468\u671f\u95f4\uff0c\u67d0\u98ce\u666f\u533a\u57287\u5929\u4e2d\u6765\u65c5\u6e38\u7684\u4eba\u6570\u53d8\u5316\u5982\u4e0b\u8868:\uff08\u6b63\u6570\u8868\u793a\u6bd4\u524d\u4e00\u5929\u591a\u7684\u4eba\u6570\uff0c\u8d1f\u6570\u8868\u793a\u6bd4\u524d\u4e00\u5929\u5c11\u7684\u4eba\u6570\u3002\uff09
\u65e5\u671f
10\u6708
1\u65e5
10\u6708
2\u65e5
10\u6708
3\u65e5
10\u6708
4\u65e5
10\u6708
5\u65e5
10\u6708
6\u65e5
10\u6708
7\u65e5
\u4eba\u6570\u53d8\u5316\uff08\u5355\u4f4d\uff1a\u4e07\u4eba\uff09
+1.6
+0.8
+0.4
-0.4
-0.8
+0.2
-1.2
\uff081\uff09\u82e59\u670830\u65e5\u6765\u65c5\u6e38\u4eba\u6570\u8bb0\u4e3aa\u4e07\u4eba\uff0c\u8bf7\u7528a\u7684\u4ee3\u6570\u5f0f\u8868\u793a10\u67082\u65e5\u6765\u65c5\u6e38\u7684\u4eba\u6570\u3002
\uff082\uff09\u8bf7\u5224\u65ad\u4e03\u5929\u5185\u6765\u65c5\u6e38\u7684\u4eba\u6570\u6700\u591a\u662f\u54ea\u4e00\u5929\uff1f\u6700\u5c11\u662f\u54ea\u4e00\u5929\uff1f\u5b83\u4eec\u76f8\u5dee\u591a\u5c11\u4e07\u4eba\uff1f
\uff083\uff09\u7edf\u8ba1\u6765\u65c5\u6e38\u7684\u4eba\u6570\uff0c\u6700\u591a\u7684\u4e00\u5929\u662f3\u4e07\u4eba\uff0c\u95ee9\u670830\u65e5\u6765\u65c5\u6e38\u7684\u4eba\u6570\u6709\u591a\u5c11\u4eba\uff1f
\u6bcf\u6708\u7528\u6c34\u91cf\uff08m3\uff09
\u5355\u4ef7\uff08\u5143/m3\uff09
\u4e0d\u8d85\u8fc76 m3\u7684\u90e8\u5206
2\u5143/m3
\u8d85\u8fc76 m3\u4e0d\u8d85\u8fc710 m3\u7684\u90e8\u5206
4\u5143/m3
\u8d85\u8fc710 m3\u7684\u90e8\u5206
8\u5143/m3
\u300a\u6574\u5f0f\u7684\u52a0\u51cf\u300b
\u4e00\u3001\u9009\u62e9\u9898
1\u3001\u7528\u4ee3\u6570\u5f0f\u8868\u793aa\u4e0e-5\u7684\u5dee\u76842\u500d\u662f( )
A\u3001a-(-5)\u00d72 B\u3001a+(-5)\u00d72 C\u30012(a-5\uff09 D\u30012(a+5\uff09
2\u3001\u7528\u5b57\u6bcd\u8868\u793a\u6709\u7406\u6570\u7684\u51cf\u6cd5\u6cd5\u5219\u662f\uff08 \uff09
A\u3001a-b=a+b B\u3001a-b=a+(-b) C\u3001a-b=-a+b D\u3001a-b=a-(-b)
3\u3001\u67d0\u73ed\u5171\u6709\u5b66\u751fx\u4eba\uff0c\u5176\u4e2d\u5973\u751f\u4eba\u6570\u536035\uff05\uff0c\u90a3\u4e48\u7537\u751f\u4eba\u6570\u662f\uff08 \uff09
A\u300135\uff05x B\u3001(1\uff0d35\uff05)x C\u3001 D\u3001
4\u3001\u82e5\u4ee3\u6570\u5f0f \u4e0e\u4ee3\u6570\u5f0f \u662f\u540c\u7c7b\u9879\uff0c\u5219 \u7684\u503c\u662f\uff08 \uff09
A\u30019 B\u3001 C\u30014 D\u3001
5\u3001\u628a-x-x\u5408\u5e76\u540c\u7c7b\u9879\u5f97\uff08 \uff09
A\u30010 B\u3001-2 C\u3001-2x D\u3001-2x2
6\u3001\u4e00\u4e2a\u4e24\u4f4d\u6570\uff0c\u5341\u4f4d\u4e0a\u7684\u6570\u5b57\u662fx\uff0c\u4e2a\u4f4d\u4e0a\u7684\u6570\u5b57\u662fy\uff0c\u5982\u679c\u628a\u5341\u4f4d\u4e0a\u7684\u6570\u4e0e\u4e2a\u4f4d\u4e0a\u7684\u6570\u5bf9\u8c03\uff0c\u6240\u5f97\u7684\u4e24\u4f4d\u6570\u662f\uff08 \uff09
A\u3001yx B\u3001y+x C\u300110y+x D\u300110x+y
\u5355\u9879\u5f0f\u7684\u7cfb\u6570\u662f \uff0c\u6b21\u6570\u662f \uff0e
7\u3001\u5982\u679c\u4ee3\u6570\u5f0f\u7684\u503c\u4e3a7\uff0c\u90a3\u4e48\u4ee3\u6570\u5f0f\u7684\u503c\u7b49\u4e8e\uff08 \uff09
A\u30012 B\u30013 C\u3001 D\u30014
8\u3001\u4e0b\u9762\u7684\u5f0f\u5b50\uff0c\u6b63\u786e\u7684\u662f\uff08 \uff09
A\u30013a2+5a2=8a4 B\u30015a2b-6ab2=-ab2
C\u30016xy-9yx=-3xy D\u30012x+3y=5xy
9\u3001\u4e00\u4e2a\u591a\u9879\u5f0f\u52a0\u4e0ax2y-3xy2\u5f972x2y-xy2\uff0c\u5219\u8fd9\u4e2a\u591a\u9879\u5f0f\u662f\uff08 \uff09
A\u30013x2y-4xy2\uff1b B\u3001x2y-4xy2\uff1b C\u3001x2y+2xy2\uff1b D\u3001-x2y-2xy2
10\u3001\u82e5A=x2\uff0d5x\uff0b2\uff0cB=x2\uff0d5x-6\uff0c\u5219A\u4e0eB\u7684\u5927\u5c0f\u5173\u7cfb\u662f\uff08 \uff09
\uff08A\uff09A>B \uff08B\uff09A=B \uff08C\uff09A<B \uff08D\uff09\u65e0\u6cd5\u786e\u5b9a
\u4e8c\u3001\u586b\u7a7a\u9898
11\u3001\u5355\u9879\u5f0f\u7684\u7cfb\u6570\u662f______\uff0c\u6b21\u6570\u662f______\uff1b
12\u3001\u662f \u6b21 \u9879\u5f0f\uff0c\u5b83\u7684\u9879\u5206\u522b\u662f \uff0c
\u5176\u4e2d\u5e38\u6570\u9879\u662f \uff1b
13\u3001\u4e3a\u9f13\u52b1\u8282\u7ea6\u7528\u7535\uff0c\u67d0\u5730\u5bf9\u5c45\u6c11\u7528\u6237\u7528\u7535\u6536\u8d39\u6807\u51c6\u4f5c\u5982\u4e0b\u89c4\u5b9a\uff1a\u6bcf\u6237\u6bcf\u6708\u7528\u7535\u5982\u679c\u4e0d\u8d85\u8fc7100\u5ea6\uff0c\u90a3\u4e48\u6bcf\u5ea6\u7535\u4ef7\u6309a\u5143\u6536\u8d39\uff1b\u5982\u679c\u8d85\u8fc7100\u5ea6\uff0c\u90a3\u4e48\u8d85\u8fc7\u90e8\u5206\u6bcf\u5ea6\u7535\u4ef7\u6309b\u5143\u6536\u8d39\u3002\u67d0\u6237\u5c45\u6c11\u5728\u4e00\u4e2a\u6708\u5185\u7528\u7535160\u5ea6\uff0c\u4ed6\u8fd9\u4e2a\u6708\u5e94\u7f34\u7eb3\u7535\u8d39\u662f
\u5143\uff1b\uff08\u7528\u542ba\u3001b\u7684\u4ee3\u6570\u5f0f\u8868\u793a\uff09
14\u3001\u4e09\u4e2a\u8fde\u7eed\u5076\u6570\u4e2d\uff0c2n\u662f\u6700\u5c0f\u7684\u4e00\u4e2a\uff0c\u8fd9\u4e09\u4e2a\u6570\u7684\u548c\u4e3a______ _\uff1b
15\u3001\u5982\u56fe1\u662f\u5c0f\u660e\u7528\u706b\u67f4\u642d\u76841\u6761\u30012\u6761\u30013\u6761\u201c\u91d1\u9c7c\u201d\uff0c\u5219\u642d\u6761\u201c\u91d1\u9c7c\u201d\u9700\u8981\u706b\u67f4 \u6839\uff0e
16\u3001\u6839\u636e\u5982\u56fe\u6240\u793a\u7684\u7a0b\u5e8f\u8ba1\u7b97\uff0c
\u82e5\u8f93\u5165x\u7684\u503c\u4e3a1\uff0c\u5219\u8f93\u51fay\u7684\u503c\u4e3a
\uff1b
\u4e09\u3001\u89e3\u7b54\u9898\uff1a
17\u7b2c\u4e00\u7ec4\u3001\u5316\u7b80(1) 7-3x-4x2+4x-8x2-15 (2) 2(2a2-9b)-3(\uff0d4a2+b)
(3) 8x2-[-3x-(2x2-7x-5)+3]+4x
\u7b2c\u4e8c\u7ec4
1) (2)
(3) (4)
(5) (6)
18\u3001\u5148\u5316\u7b80\uff0c\u540e\u6c42\u503c\uff1b
\uff081\uff09(5x-3y-2xy)-(6x+5y-2xy)\uff0c\u5176\u4e2d\uff0c
\uff082\uff09\u82e5\uff0c\u6c423a2b\uff0d[2ab2\uff0d2\uff08ab\uff0d1.5a2b\uff09+ab]+3ab2\u7684\u503c\uff1b
3\uff09. ;
8\u3001\u5df2\u77e5x+4y=\uff0d1\uff0cxy=5\uff0c\u6c42(6xy\uff0b7y)\uff0b[8x\uff0d(5xy\uff0dy\uff0b6x)]\u7684\u503c.
\u82e5a3\uff0bb3=35\uff0ca2b\uff0dab2=\uff0d6\uff0c\u5219(a3\uff0db3)\uff0b(3ab2\uff0da2b)\uff0d2(ab2\uff0db3)\u7684\u503c\u662f\u591a\u5c11\uff1f
31\u3001\u82e52x\uff0b5y\uff0b4z=6\uff0c3x\uff0by\uff0d7z=\uff0d4\uff0c\u90a3\u4e48x\uff0by\uff0dz\u7684\u503c\u662f\u591a\u5c11\uff1f
19\u3001\u6709\u8fd9\u6837\u4e00\u9053\u9898\uff0c\u8ba1\u7b97\u7684\u503c\uff0c\u5176\u4e2d
x=0.25\uff0cy=-1\uff1b\u7532\u540c\u5b66\u628a\u201cx=0.25\u201d\uff0c\u9519\u6284\u6210\u201cx=-0.25\u201d,\u4f46\u4ed6\u7684\u8ba1\u7b97\u7ed3\u679c\u4e5f\u662f\u6b63\u786e\u7684\uff0c\u4f60\u8bf4\u8fd9\u662f\u4e3a\u4ec0\u4e48\uff1f
18\uff0e\uff086\u5206\uff09\u5982\u56fe\u6240\u793a\uff0c\u5728\u4e0b\u9762\u7531\u706b\u67f4\u68d2\u62fc\u51fa\u7684\u4e00\u7cfb\u5217\u7684\u56fe\u5f62\u4e2d\uff0c\u7b2cn\u4e2a\u56fe\u5f62\u7531n\u4e2a\u6b63\u65b9\u5f62\u7ec4\u6210\uff0e
\uff081\uff09\u7b2c2\u4e2a\u56fe\u5f62\u4e2d\uff0c\u706b\u67f4\u68d2\u7684\u6839\u6570\u662f________\uff1b
\uff082\uff09\u7b2c3\u4e2a\u56fe\u5f62\u4e2d\uff0c\u706b\u67f4\u68d2\u7684\u6839\u6570\u662f________\uff1b
\uff083\uff09\u7b2c4\u4e2a\u56fe\u5f62\u4e2d\uff0c\u706b\u67f4\u68d2\u7684\u6839\u6570\u662f_______\uff1b
\uff084\uff09\u7b2cn\u4e2a\u56fe\u5f62\u4e2d\uff0c\u706b\u67f4\u68d2\u7684\u6839\u6570\u662f________\uff0e
19\uff0e\uff088\u5206\uff09\u6709\u8fd9\u6837\u4e00\u9053\u9898\uff1a\u201c\u5f53a=2009\uff0cb=\u20142010\u65f6\uff0c\u6c42\u591a\u9879\u5f0f
+2010\u7684\u503c\uff0e\u201d
\u5c0f\u660e\u8bf4\uff1a\u672c\u9898\u4e2da=2009\uff0cb=\u20142010\u662f\u591a\u4f59\u7684\u6761\u4ef6\uff1b\u5c0f\u5f3a\u9a6c\u4e0a\u53cd\u5bf9\u8bf4\uff1a\u8fd9\u4e0d\u53ef\u80fd\uff0c\u591a\u9879\u5f0f\u4e2d\u542b\u6709\u548c\uff0c\u4e0d\u7ed9\u51fa\u7684\u503c\u600e\u4e48\u80fd\u6c42\u51fa\u591a\u9879\u5f0f\u7684\u503c\u5462\uff1f
\u4f60\u540c\u610f\u54ea\u540d\u540c\u5b66\u7684\u89c2\u70b9\uff1f\u8bf7\u8bf4\u660e\u7406\u7531\uff0e
20\uff0e\uff088\u5206\uff09\u4e00\u4e2a\u4e09\u89d2\u5f62\u4e00\u8fb9\u957f\u4e3aa+b\uff0c\u53e6\u4e00\u8fb9\u957f\u6bd4\u8fd9\u6761\u8fb9\u5927b\uff0c\u7b2c\u4e09\u8fb9\u957f\u6bd4\u8fd9\u6761\u8fb9\u5c0fa\u2014b\uff0e
\uff081\uff09\u6c42\u8fd9\u4e2a\u4e09\u89d2\u5f62\u7684\u5468\u957f\uff1b\uff082\uff09\u82e5a=5\uff0cb=3\uff0c\u6c42\u4e09\u89d2\u5f62\u5468\u957f\u7684\u503c\uff0e
\u56db\u3001\u62d3\u5e7f\u63a2\u7d22\uff08\u517116\u5206\uff09
21\uff0e\uff088\u5206\uff09\u6709\u4e00\u4e32\u5355\u9879\u5f0f\uff1ax\uff0c-2x2\uff0c3x3\uff0c-4x4\uff0c\u2026\u2026\uff0c-10x10\uff0c\u2026\u2026
\uff081\uff09\u8bf7\u4f60\u5199\u51fa\u7b2c100\u4e2a\u5355\u9879\u5f0f\uff1b\uff082\uff09\u8bf7\u4f60\u5199\u51fa\u7b2cn\u4e2a\u5355\u9879\u5f0f\uff0e
22\uff0e\uff088\u5206\uff09\u5982\u56fe\u6240\u793a\uff0c\u8bf7\u4f60\u63a2\u7d22\u6b63\u65b9\u5f62\u7684\u4e2a\u6570\u4e0e\u7b49\u8170\u4e09\u89d2\u5f62\u7684\u4e2a\u6570\u4e4b\u95f4\u7684\u5173\u7cfb\uff0e
\u6b63\u65b9\u5f62\u4e2a\u6570
1
2
3
4
\u2026
n
\u7b49\u8170\u4e09\u89d2\u5f62\u4e2a\u6570
\uff081\uff09\u7167\u8fd9\u6837\u7684\u753b\u6cd5\uff0c\u5982\u679c\u753b15\u4e2a\u6b63\u65b9\u5f62\uff0c\u53ef\u4ee5\u5f97_______\u4e2a\u7b49\u8170\u4e09\u89d2\u5f62\uff1b
\uff082\uff09\u82e5\u8981\u5f97\u5230152\u4e2a\u7b49\u8170\u4e09\u89d2\u5f62\uff0c\u5e94\u753b_______\u4e2a\u6b63\u65b9\u5f62\uff1b
2.1-2.2\u6d4b\u8bd5B
1\uff0e\uff087\u5206\uff09\u5df2\u77e5x2\u2014xy=21\uff0cxy-y2=\u201412\uff0c\u5206\u522b\u6c42\u5f0f\u5b50x2-y2\u4e0ex2\u20142xy+y2\u7684\u503c\uff0e
2\uff0e\uff087\u5206\uff09\u540c\u4e00\u65f6\u523b\u7684\u5317\u4eac\u65f6\u95f4\u3001\u5df4\u9ece\u65f6\u95f4\u3001\u4e1c\u4eac\u65f6\u95f4\u5982\u56fe\u6240\u793a\uff0e
(1)\u8bbe\u5317\u4eac\u65f6\u95f4\u4e3a\uff0c\u5206\u522b\u7528\u4ee3\u6570\u5f0f\u8868\u793a\u540c\u4e00\u65f6\u523b\u7684\u5df4\u9ece\u65f6\u95f4\u548c\u4e1c\u4eac\u65f6\u95f4\uff1b
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20\u3001\u201c\u5341\u4e00\u201d\u9ec4\u91d1\u5468\u671f\u95f4\uff0c\u67d0\u98ce\u666f\u533a\u57287\u5929\u4e2d\u6765\u65c5\u6e38\u7684\u4eba\u6570\u53d8\u5316\u5982\u4e0b\u8868:\uff08\u6b63\u6570\u8868\u793a\u6bd4\u524d\u4e00\u5929\u591a\u7684\u4eba\u6570\uff0c\u8d1f\u6570\u8868\u793a\u6bd4\u524d\u4e00\u5929\u5c11\u7684\u4eba\u6570\u3002\uff09
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10\u6708
1\u65e5
10\u6708
2\u65e5
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4\u65e5
10\u6708
5\u65e5
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10\u6708
7\u65e5
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+1.6
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+0.4
-0.4
-0.8
+0.2
-1.2
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\u6bcf\u6708\u7528\u6c34\u91cf\uff08m3\uff09
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8\u5143/m3
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=______．
(二)选择
[ ]
A．2；
B．-2；
C．-10；
D．-6．
52．下列各式中计算结果为-7x-5x2+6x3的是 [ ]
A．3x-(5x2+6x3-10x)；
B．3x-(5x2+6x3+10x)；
C．3x-(5x2-6x3+10x)；
D．3x-(5x2-6x3-10x)．
53．把(-x-y)+3(x+y)-5(x+y)合并同类项得 [ ]
A．(x-y)-2(x+y)；
B．-3(x+y)；
C．(-x-y)-2(x+y)；
D．3(x+y)．
54．2a-[3b-5a-(2a-7b)]等于 [ ]
A．-7a+10b；
B．5a+4b；
C．-a-4b；
D．9a-10b．
55．减去-3m等于5m2-3m-5的代数式是 [ ]
A．5(m2-1)；
B．5m2-6m-5；
C．5(m2+1)；
D．-(5m2+6m-5)．
56．将多项式2ab-9a2-5ab-4a2中的同类项分别结合在一起，应为 [ ]
A．(9a2-4a2)+(-2ab-5ab)；
B．(9a2+4a2)-(2ab-5ab)；
C．(9a2-4a2)-(2ab+5ab)；
D．(9a2-4a2)+(2ab-5ab)．
57．当a=2，b=1时，-a2b+3ba2-(-2a2b)等于 [ ]
A．20；
B．24；
C．0；
D．16．
中，正确的选择是 [ ]
A．没有同类项；
B．(2)与(4)是同类项；
C．(2)与(5)是同类项；
D．(2)与(4)不是同类项．
59．若A和B均为五次多项式，则A-B一定是 [ ]
A．十次多项式；
B．零次多项式；
C．次数不高于五次的多项式；
D．次数低于五次的多项式．
60．-｛[-(x+y)]｝+｛-[(x+y)]｝等于 [ ]
A．0；
B．-2y；
C．x+y；
D．-2x-2y．
61．若A=3x2-5x+2，B=3x2-5x+6，则A与B的大小是
[ ]
A．A＞B；
B．A=B；
C．A＜B；
D．无法确定．
62．当m=-1时，-2m2-[-4m2+(-m2)]等于 [ ]
A．-7；
B．3；
C．1；
D．2．
63．当m=2，n=1时，多项式-m-[-(2m-3n)]+[-(-3m)-4n]等于 [ ]
A．1；
B．9；
C．3；
D．5．
[ ]
65．-5an-an-(-7an)+(-3an)等于 [ ]
A．-16an；
B．-16；
C．-2an；
D．-2．
66．(5a-3b)-3(a2-2b)等于 [ ]
A．3a2+5a+3b；
B．2a2+3b；
C．2a3-b2；
D．-3a2+5a-5b．
67．x3-5x2-4x+9等于 [ ]
A．(x3-5x2)-(-4x+9)；
B．x3-5x2-(4x+9)；
C．-(-x3+5x2)-(4x-9)；
D．x3+9-(5x2-4x)．
[ ]
69．4x2y-5xy2的结果应为 [ ]
A．-x2y；
B．-1；
C．-x2y2；
D．以上答案都不对．
(三)化简
70．(4x2-8x+5)-(x3+3x2-6x+2)．
72．(0.3x3-x2y+xy2-y3)-(-0.5x3-x2y+0.3xy2)．
73．-{2a2b-[3abc-(4ab2-a2b)]｝．
74．(5a2b+3a2b2-ab2)-(-2ab2+3a2b2+a2b)．
75．(x2-2y2-z2)-(-y2+3x2-z2)+(5x2-y2+2z2)．
76．(3a6-a4+2a5-4a3-1)-(2-a+a3-a5-a4)．
77．(4a-2b-c)-5a-[8b-2c-(a+b)]．
78．(2m-3n)-(3m-2n)+(5n+m)．
79．(3a2-4ab-5b2)-(2b2-5a2+2ab)-(-6ab)．
80．xy-(2xy-3z)+(3xy-4z)．
81．(-3x3+2x2-5x+1)-(5-6x-x2+x3)．
83．3x-(2x-4y-6x)+3(-2z+2y)．
84．(-x2+4+3x4-x3)-(x2+2x-x4-5)．
85．若A=5a2-2ab+3b2，B=-2b2+3ab-a2，计算A+B．
86．已知A=3a2-5a-12，B=2a2+3a-4，求2(A-B)．
87．2m-{-3n+[-4m-(3m-n)]｝．
88．5m2n+(-2m2n)+2mn2-(+m2n)．
89．4(x-y+z)-2(x+y-z)-3(-x-y-z)．
90．2(x2-2xy+y2-3)+(-x2+y2)-(x2+2xy+y2)．
92．2(a2-ab-b2)-3(4a-2b)+2(7a2-4ab+b2)．
94．4x-2(x-3)-3[x-3(4-2x)+8]．
(四)将下列各式先化简，再求值
97．已知a+b=2，a-b=-1，求3(a+b)2(a-b)2-5(a+b)2×(a-b)2的值．
98．已知A=a2+2b2-3c2，B=-b2-2c2+3a2，C=c2+2a2-3b2，求(A-B)+C．
99．求(3x2y-2xy2)-(xy2-2x2y)，其中x=-1，y=2．
101．已知|x+1|+(y-2)2=0，求代数式5(2x-y)-3(x-4y)的值．
106．当P=a2+2ab+b2，Q=a2-2ab-b2时，求P-[Q-2P-(P-Q)]．
107．求2x2-｛-3x+5+[4x2-(3x2-x-1)]｝的值，其中x=-3．
110．当x=-2，y=-1，z=3时，求5xyz-｛2x2y-[3xyz-(4xy2-x2y)]｝的值．
113．已知A=x3-5x2，B=x2-6x+3，求A-3(-2B)．
(五)综合练习
115．去括号：｛-[-(a+b)]｝-｛-[-(a-b)]｝．
116．去括号：-[-(-x)-y]-[+(-y)-(+x)]．
117．已知A=x3+6x-9，B=-x3-2x2+4x-6，计算2A-3B，并把结果放在前面带“-”号的括号内．
118．计算下式，并把结果放在前面带“-”号的括号内：
(-7y2)+(-4y)-(-y2)-(+5y)+(-8y2)+(+3y)．
119．去括号、合并同类项，将结果按x的升幂排列，并把后三项放在带有“-”号的括号内：
120．不改变下式的值，将其中各括号前的符号都变成相反的符号：(x3+3x2)-(3x2y-7xy)+(2y3-3y2)．
121．把多项式4x2y-2xy2+4xy+6-x2y2+x3-y2的三次项放在前面带有“-”号的括号内，二次项放在前面带有“+”号的括号内，四次项和常数项放在前面带有“-”号的括号内．
122．把下列多项式的括号去掉，合并同类项，并将其各项放在前面带有“-”号的括号内，再求2x-2[3x-(5x2-2x+1)]-4x2的值，其中x=-1．
123．合并同类项：
7x-1.3z-4.7-3.2x-y+2.1z+5-0.1y．
124．合并同类项：5m2n+5mn2-mn+3m2n-6mn2-8mn．
126．去括号，合并同类项：
(1)(m+1)-(-n+m)；
(2)4m-[5m-(2m-1)]．
127．化简：2x2-｛-3x-[4x2-(3x2-x)+(x-x2)]｝．
128．化简：-(7x-y-2z)-｛[4x-(x-y-z)-3x+z]-x｝．
129．计算：(+3a)+(-5a)+(-7a)+(-31a)-(+4a)-(-8a)．
130．化简：a3-(a2-a)+(a2-a+1)-(1-a4+a3)．
131．将x2-8x+2x3-13x2-2x-2x3+3先合并同类项，再求值，其中x=-4．
132．在括号内填上适当的项：[( )-9y+( )]+2y2+3y-4=11y2-( )+13．
133．在括号内填上适当的项：
(-x+y+z)(x+y-z)=[y-( )][y+( )]．
134．在括号内填上适当的项：
(3x2+xy-7y2)-( )=y2-2xy-x2．
135．在括号内填上适当的项：
(1)x2-xy+y-1=x2-( )；
(2)[( )+6x-7]-[4x2+( )-( )]=x2-2x+1．
136．计算4x2-3[x+4(1-x)-x2]-2(4x2-1)的值．
137．化简：
138．用竖式计算
(-x+5+2x4-6x3)-(3x4+2x2-3x3-7)．
139．已知A=11x3+8x2-6x+2，B=7x3-x2+x+3，求2(3A-2B)．
140．已知A=x3-5x2，B=x3-11x+6，C=4x-3，求
(1)A-B-C；
(2)(A-B-C)-(A-B+C)．
141．已知A=3x2-4x3，B=x3-5x2+2，计算
(1)A+B；
(2)B-A．
142．已知x＜-4，化简|-x|+|x+4|-|x-4|．
146．求两代数式-1.56a+3.2a3-0.47，2.27a3-0.02a2+4.03a+0.53的差与6-0.15a+3.24a2+5.07a3的和．
-0.3，y=-0.2．
150．已知(x-3)2+|y+1|+z2=0，求x2-2xy-5x2+12xz+3xy-z2-8xz-2x2的值
太简单了
我只写第一个的
其他的明天帮你哈
第一个等于ab
楼主你好!
1.已知ab^2=6，求ab(ab^3=a^2b^5-b)的值
2.已知 1/x-1/y=3，求(2y-3xy-2x)/(y+2xy-x)的值
做不出来再问我要答案哈
你去百度文库吧
绛旓細瑙ｏ細2y-x=5锛屽彲鐭-2y=-5 鎵浠ュ師寮=(-5)²-3x5+60 =25-15+60 =70
绛旓細1銆102脳105=___锛2銆乤4路a6=___锛3銆亁路x3路x11=___锛4銆侊紞y路y7路y8=___锛5銆(锛1) 2003=___锛6銆( )3=___锛7銆乼路t11=___锛8銆(锛峴)2路(锛峴)5=___锛9銆(xy)2路(xy)3=___锛10銆(a+b)2路(a+b)6=___锛11銆乤6路a2=___锛12銆亁6路x路x7=___...
绛旓細3 ,m=5锛宯=1锛4锛宮=2锛宯=2鎴-2 5锛寈^2-5 6,m=0涓攎涓嶇瓑浜1 7,2013 8锛-2 9锛宮=3锛宯=4 10,3
绛旓細=3x^2-6xy+6xy-2y^2 =3x^2-2y^2
绛旓細锛1锛夊師寮=2P-Q-3Q+P=3P-4Q 锛2锛夊師寮=A骞虫柟+2A+1-2A+2=A骞虫柟+3 锛3锛夊師寮=3X骞虫柟-6XY+6XY-Y骞虫柟=3X骞虫柟-Y骞虫柟
绛旓細鍥炵瓟锛氬師寮=5x²-3x-4 褰搙=-2/3鏃 鍘熷紡=5脳4/9+2-4 =20/9-2 =2/9
绛旓細m-2n=-3 鍒檓-2n=-6 鎵浠 鈥5鈥2m+4n =-5-2(m-2n)=-5+12 =7 璁捐繖涓暟涓篴 5(2a+3)-25=100 10a-10=100 10a=110 a=11 濂ョ灏辨槸鐢ㄨ繖涓暟闄や互10锛屽啀鍔1锛屽氨鏄皬鍗庡悓瀛︿粠涓娊鍘荤殑鐗
绛旓細璁捐繖涓笁浣嶆暟鐨勭櫨浣嶄负a锛屽崄浣嶄负b锛屼釜浣嶄负c 鍒100a+10b+c=99a+9b+a+b+c=9(11a+b)+a+b+c 9(11a+b)涓9鐨勫嶆暟 濡傛灉鍚勬暟浣嶆暟瀛椾箣鍜屾槸9鐨勫嶆暟锛屽垯a+b+c鏄9鐨勫嶆暟 鍥犱负9锛11a+b)鏄9鐨勫嶆暟锛宎+b+c鏄9鐨勫嶆暟锛屾墍浠99a+9b+a+b+c鏄9鐨勫嶆暟 鎵浠100a+10b+c鏄9鐨勫嶆暟 鎵浠ヨ繖涓笁...
绛旓細瑙ｏ細(1)鍐欎竴涓袱浣嶆暟濡傦細27锛(2)鍗佷綅鏁板瓧涓庝釜浣嶆暟瀛椾氦鎹㈠悗寰楀埌鏂颁袱浣嶆暟锛72锛(3)72锛27锛45锛45鏄9鐨勫嶆暟.濡39涓93锛93锛39锛54锛54鏄9鐨勫嶆暟锛涘29涓92锛92锛29锛63锛63鏄9鐨勫嶆暟锛涙帹骞垮埌浠绘剰涓や綅鏁帮紝璁惧崄浣嶆暟瀛椾负a锛屼釜浣嶆暟瀛椾负b锛屽垯杩欎釜涓や綅鏁版槸10a锛媌锛屽崄浣嶆暟瀛椾笌涓綅鏁板瓧浜ゆ崲鍚...
绛旓細1銆1.6a+锛坸-a锛壝楋紙1.6+0.4锛=1.6a+2锛坸-a锛=1.6a+2x-2a=-0.4a+2x 2銆佸皢a=100銆亁=150甯﹀叆1銆佽嚜宸辩畻鍚
