初中数学计算题80道 80道八年级下数学计算题带答案
\u521d\u4e2d\u6570\u5b66\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u8ba1\u7b97\u9898\uff01\u6025\u9700+\u7b54\u684880\u9053\u7b2c3\u7ae0 \u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u5168\u7ae0\u7efc\u5408\u6d4b\u8bd5
\uff08\u65f6\u95f490\u5206\u949f\uff0c\u6ee1\u5206100\u5206\uff09
\u4e00\u3001\u586b\u7a7a\u9898\uff0e\uff08\u6bcf\u5c0f\u98983\u5206\uff0c\u517124\u5206\uff09
1\uff0e\u5df2\u77e54x2n-5+5=0\u662f\u5173\u4e8ex\u7684\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff0c\u5219n=_______\uff0e
2\uff0e\u82e5x=-1\u662f\u65b9\u7a0b2x-3a=7\u7684\u89e3\uff0c\u5219a=_______\uff0e
3\uff0e\u5f53x=______\u65f6\uff0c\u4ee3\u6570\u5f0f x-1\u548c \u7684\u503c\u4e92\u4e3a\u76f8\u53cd\u6570\uff0e
4\uff0e\u5df2\u77e5x\u7684 \u4e0ex\u76843\u500d\u7684\u548c\u6bd4x\u76842\u500d\u5c116\uff0c\u5217\u51fa\u65b9\u7a0b\u4e3a________\uff0e
5\uff0e\u5728\u65b9\u7a0b4x+3y=1\u4e2d\uff0c\u7528x\u7684\u4ee3\u6570\u5f0f\u8868\u793ay\uff0c\u5219y=________\uff0e
6\uff0e\u67d0\u5546\u54c1\u7684\u8fdb\u4ef7\u4e3a300\u5143\uff0c\u6309\u6807\u4ef7\u7684\u516d\u6298\u9500\u552e\u65f6\uff0c\u5229\u6da6\u7387\u4e3a5%\uff0c\u5219\u5546\u54c1\u7684\u6807\u4ef7\u4e3a____\u5143\uff0e
7\uff0e\u5df2\u77e5\u4e09\u4e2a\u8fde\u7eed\u7684\u5076\u6570\u7684\u548c\u4e3a60\uff0c\u5219\u8fd9\u4e09\u4e2a\u6570\u662f________\uff0e
8\uff0e\u4e00\u4ef6\u5de5\u4f5c\uff0c\u7532\u5355\u72ec\u505a\u97006\u5929\u5b8c\u6210\uff0c\u4e59\u5355\u72ec\u505a\u970012\u5929\u5b8c\u6210\uff0c\u82e5\u7532\u3001\u4e59\u4e00\u8d77\u505a\uff0c\u5219\u9700________\u5929\u5b8c\u6210\uff0e
\u4e8c\u3001\u9009\u62e9\u9898\uff0e\uff08\u6bcf\u5c0f\u98983\u5206\uff0c\u517130\u5206\uff09
9\uff0e\u65b9\u7a0b2m+x=1\u548c3x-1=2x+1\u6709\u76f8\u540c\u7684\u89e3\uff0c\u5219m\u7684\u503c\u4e3a\uff08 \uff09\uff0e
A\uff0e0 B\uff0e1 C\uff0e-2 D\uff0e-
10\uff0e\u65b9\u7a0b\u25023x\u2502=18\u7684\u89e3\u7684\u60c5\u51b5\u662f\uff08 \uff09\uff0e
A\uff0e\u6709\u4e00\u4e2a\u89e3\u662f6 B\uff0e\u6709\u4e24\u4e2a\u89e3\uff0c\u662f\u00b16
C\uff0e\u65e0\u89e3 D\uff0e\u6709\u65e0\u6570\u4e2a\u89e3
11\uff0e\u82e5\u65b9\u7a0b2ax-3=5x+b\u65e0\u89e3\uff0c\u5219a\uff0cb\u5e94\u6ee1\u8db3\uff08 \uff09\uff0e
A\uff0ea\u2260 \uff0cb\u22603 B\uff0ea= \uff0cb=-3
C\uff0ea\u2260 \uff0cb=-3 D\uff0ea= \uff0cb\u2260-3
12\uff0e\u628a\u65b9\u7a0b \u7684\u5206\u6bcd\u5316\u4e3a\u6574\u6570\u540e\u7684\u65b9\u7a0b\u662f\uff08 \uff09\uff0e
13\uff0e\u5728800\u7c73\u8dd1\u9053\u4e0a\u6709\u4e24\u4eba\u7ec3\u4e2d\u957f\u8dd1\uff0c\u7532\u6bcf\u5206\u949f\u8dd1300\u7c73\uff0c\u4e59\u6bcf\u5206\u949f\u8dd1260\u7c73\uff0c\u4e24\u4eba\u540c\u5730\u3001\u540c\u65f6\u3001\u540c\u5411\u8d77\u8dd1\uff0ct\u5206\u949f\u540e\u7b2c\u4e00\u6b21\u76f8\u9047\uff0ct\u7b49\u4e8e\uff08 \uff09\uff0e
A\uff0e10\u5206 B\uff0e15\u5206 C\uff0e20\u5206 D\uff0e30\u5206
14\uff0e\u67d0\u5546\u573a\u5728\u7edf\u8ba1\u4eca\u5e74\u7b2c\u4e00\u5b63\u5ea6\u7684\u9500\u552e\u989d\u65f6\u53d1\u73b0\uff0c\u4e8c\u6708\u4efd\u6bd4\u4e00\u6708\u4efd\u589e\u52a0\u4e8610%\uff0c\u4e09\u6708\u4efd\u6bd4\u4e8c\u6708\u4efd\u51cf\u5c11\u4e8610%\uff0c\u5219\u4e09\u6708\u4efd\u7684\u9500\u552e\u989d\u6bd4\u4e00\u6708\u4efd\u7684\u9500\u552e\u989d\uff08 \uff09\uff0e
A\uff0e\u589e\u52a010% B\uff0e\u51cf\u5c1110% C\uff0e\u4e0d\u589e\u4e5f\u4e0d\u51cf D\uff0e\u51cf\u5c111%
15\uff0e\u5728\u68af\u5f62\u9762\u79ef\u516c\u5f0fS= \uff08a+b\uff09h\u4e2d\uff0c\u5df2\u77e5h=6\u5398\u7c73\uff0ca=3\u5398\u7c73\uff0cS=24\u5e73\u65b9\u5398\u7c73\uff0c\u5219b=\uff08 \uff09\u5398\u7c73\uff0e
A\uff0e1 B\uff0e5 C\uff0e3 D\uff0e4
16\uff0e\u5df2\u77e5\u7532\u7ec4\u670928\u4eba\uff0c\u4e59\u7ec4\u670920\u4eba\uff0c\u5219\u4e0b\u5217\u8c03\u914d\u65b9\u6cd5\u4e2d\uff0c\u80fd\u4f7f\u4e00\u7ec4\u4eba\u6570\u4e3a\u53e6\u4e00\u7ec4\u4eba\u6570\u7684\u4e00\u534a\u7684\u662f\uff08 \uff09\uff0e
A\uff0e\u4ece\u7532\u7ec4\u8c0312\u4eba\u53bb\u4e59\u7ec4 B\uff0e\u4ece\u4e59\u7ec4\u8c034\u4eba\u53bb\u7532\u7ec4
C\uff0e\u4ece\u4e59\u7ec4\u8c0312\u4eba\u53bb\u7532\u7ec4
D\uff0e\u4ece\u7532\u7ec4\u8c0312\u4eba\u53bb\u4e59\u7ec4\uff0c\u6216\u4ece\u4e59\u7ec4\u8c034\u4eba\u53bb\u7532\u7ec4
17\uff0e\u8db3\u7403\u6bd4\u8d5b\u7684\u89c4\u5219\u4e3a\u80dc\u4e00\u573a\u5f973\u5206\uff0c\u5e73\u4e00\u573a\u5f971\u5206\uff0c\u8d1f\u4e00\u573a\u662f0\u5206\uff0c\u4e00\u4e2a\u961f\u6253\u4e8614\u573a\u6bd4\u8d5b\uff0c\u8d1f\u4e865\u573a\uff0c\u5171\u5f9719\u5206\uff0c\u90a3\u4e48\u8fd9\u4e2a\u961f\u80dc\u4e86\uff08 \uff09\u573a\uff0e
A\uff0e3 B\uff0e4 C\uff0e5 D\uff0e6
18\uff0e\u5982\u56fe\u6240\u793a\uff0c\u5728\u7532\u56fe\u4e2d\u7684\u5de6\u76d8\u4e0a\u5c062\u4e2a\u7269\u54c1\u53d6\u4e0b\u4e00\u4e2a\uff0c\u5219\u5728\u4e59\u56fe\u4e2d\u53f3\u76d8\u4e0a\u53d6\u4e0b\u51e0\u4e2a\u781d\u7801\u624d\u80fd\u4f7f\u5929\u5e73\u4ecd\u7136\u5e73\u8861\uff1f\uff08 \uff09
A\uff0e3\u4e2a B\uff0e4\u4e2a C\uff0e5\u4e2a D\uff0e6\u4e2a
\u4e09\u3001\u89e3\u7b54\u9898\uff0e\uff0819\uff0c20\u9898\u6bcf\u98986\u5206\uff0c21\uff0c22\u9898\u6bcf\u98987\u5206\uff0c23\uff0c24\u9898\u6bcf\u989810\u5206\uff0c\u517146\u5206\uff09
19\uff0e\u89e3\u65b9\u7a0b\uff1a -9.5\uff0e
20\uff0e\u89e3\u65b9\u7a0b\uff1a \uff08x-1\uff09- \uff083x+2\uff09= - \uff08x-1\uff09\uff0e
21\uff0e\u5982\u56fe\u6240\u793a\uff0c\u5728\u4e00\u5757\u5c55\u793a\u724c\u4e0a\u6574\u9f50\u5730\u8d34\u7740\u8bb8\u591a\u8d44\u6599\u5361\u7247\uff0c\u8fd9\u4e9b\u5361\u7247\u7684\u5927\u5c0f\u76f8\u540c\uff0c\u5361\u7247\u4e4b\u95f4\u9732\u51fa\u4e86\u4e09\u5757\u6b63\u65b9\u5f62\u7684\u7a7a\u767d\uff0c\u5728\u56fe\u4e2d\u7528\u659c\u7ebf\u6807\u660e\uff0e\u5df2\u77e5\u5361\u7247\u7684\u77ed\u8fb9\u957f\u5ea6\u4e3a10\u5398\u7c73\uff0c\u60f3\u8981\u914d\u4e09\u5f20\u56fe\u7247\u6765\u586b\u8865\u7a7a\u767d\uff0c\u9700\u8981\u914d\u591a\u5927\u5c3a\u5bf8\u7684\u56fe\u7247\uff0e
22\uff0e\u4e00\u4e2a\u4e09\u4f4d\u6570\uff0c\u767e\u4f4d\u4e0a\u7684\u6570\u5b57\u6bd4\u5341\u4f4d\u4e0a\u7684\u6570\u59271\uff0c\u4e2a\u4f4d\u4e0a\u7684\u6570\u5b57\u6bd4\u5341\u4f4d\u4e0a\u6570\u5b57\u76843\u500d\u5c112\uff0e\u82e5\u5c06\u4e09\u4e2a\u6570\u5b57\u987a\u5e8f\u98a0\u5012\u540e\uff0c\u6240\u5f97\u7684\u4e09\u4f4d\u6570\u4e0e\u539f\u4e09\u4f4d\u6570\u7684\u548c\u662f1171\uff0c\u6c42\u8fd9\u4e2a\u4e09\u4f4d\u6570\uff0e
23\uff0e\u636e\u4e86\u89e3\uff0c\u706b\u8f66\u7968\u4ef7\u6309\u201c \u201d\u7684\u65b9\u6cd5\u6765\u786e\u5b9a\uff0e\u5df2\u77e5A\u7ad9\u81f3H\u7ad9\u603b\u91cc\u7a0b\u6570\u4e3a1500\u5343\u7c73\uff0c\u5168\u7a0b\u53c2\u8003\u4ef7\u4e3a180\u5143\uff0e\u4e0b\u8868\u662f\u6cbf\u9014\u5404\u7ad9\u81f3H\u7ad9\u7684\u91cc\u7a0b\u6570\uff1a
\u8f66\u7ad9\u540d A B C D E F G H
\u5404\u7ad9\u81f3H\u7ad9
\u91cc\u7a0b\u6570\uff08\u7c73\uff09 1500 1130 910 622 402 219 72 0
\u4f8b\u5982\uff1a\u8981\u786e\u5b9a\u4eceB\u7ad9\u81f3E\u7ad9\u706b\u8f66\u7968\u4ef7\uff0c\u5176\u7968\u4ef7\u4e3a =87.36\u224887\uff08\u5143\uff09\uff0e
\uff081\uff09\u6c42A\u7ad9\u81f3F\u7ad9\u7684\u706b\u8f66\u7968\u4ef7\uff08\u7ed3\u679c\u7cbe\u786e\u52301\u5143\uff09\uff0e
\uff082\uff09\u65c5\u5ba2\u738b\u5927\u5988\u4e58\u706b\u8f66\u53bb\u5973\u513f\u5bb6\uff0c\u4e0a\u8f66\u8fc7\u4e24\u7ad9\u540e\u62ff\u7740\u8f66\u7968\u95ee\u4e58\u52a1\u5458\uff1a\u201c\u6211\u5feb\u5230\u7ad9\u4e86\u5417\uff1f\u201d\u4e58\u52a1\u5458\u770b\u5230\u738b\u5927\u5988\u624b\u4e2d\u7684\u7968\u4ef7\u662f66\u5143\uff0c\u9a6c\u4e0a\u8bf4\u4e0b\u4e00\u7ad9\u5c31\u5230\u4e86\uff0e\u8bf7\u95ee\u738b\u5927\u5988\u662f\u5728\u54ea\u4e00\u7ad9\u4e0b\u7684\u8f66\uff08\u8981\u6c42\u5199\u51fa\u89e3\u7b54\u8fc7\u7a0b\uff09\uff0e
24\uff0e\u67d0\u516c\u56ed\u7684\u95e8\u7968\u4ef7\u683c\u89c4\u5b9a\u5982\u4e0b\u8868\uff1a
\u8d2d\u7968\u4eba\u6570 1~50\u4eba 51~100\u4eba 100\u4eba\u4ee5\u4e0a
\u7968 \u4ef7 5\u5143 4.5\u5143 4\u5143
\u67d0\u6821\u521d\u4e00\u7532\u3001\u4e59\u4e24\u73ed\u5171103\u4eba\uff08\u5176\u4e2d\u7532\u73ed\u4eba\u6570\u591a\u4e8e\u4e59\u73ed\u4eba\u6570\uff09\u53bb\u6e38\u8be5\u516c\u56ed\uff0c\u5982\u679c\u4e24\u73ed\u90fd\u4ee5\u73ed\u4e3a\u5355\u4f4d\u5206\u522b\u8d2d\u7968\uff0c\u5219\u4e00\u5171\u9700\u4ed8486\u5143\uff0e
\uff081\uff09\u5982\u679c\u4e24\u73ed\u8054\u5408\u8d77\u6765\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u56e2\u4f53\u8d2d\u7968\uff0c\u5219\u53ef\u4ee5\u8282\u7ea6\u591a\u5c11\u94b1\uff1f
\uff082\uff09\u4e24\u73ed\u5404\u6709\u591a\u5c11\u540d\u5b66\u751f\uff1f\uff08\u63d0\u793a\uff1a\u672c\u9898\u5e94\u5206\u60c5\u51b5\u8ba8\u8bba\uff09
\u7b54\u6848:
\u4e00\u30011\uff0e3
2\uff0e-3 \uff08\u70b9\u62e8\uff1a\u5c06x=-1\u4ee3\u5165\u65b9\u7a0b2x-3a=7\uff0c\u5f97-2-3a=7\uff0c\u5f97a=-3\uff09
3\uff0e \uff08\u70b9\u62e8\uff1a\u89e3\u65b9\u7a0b x-1=- \uff0c\u5f97x= \uff09
4\uff0e x+3x=2x-6 5\uff0ey= - x
6\uff0e525 \uff08\u70b9\u62e8\uff1a\u8bbe\u6807\u4ef7\u4e3ax\u5143\uff0c\u5219 =5%\uff0c\u89e3\u5f97x=525\u5143\uff09
7\uff0e18\uff0c20\uff0c22
8\uff0e4 [\u70b9\u62e8\uff1a\u8bbe\u9700x\u5929\u5b8c\u6210\uff0c\u5219x\uff08 + \uff09=1\uff0c\u89e3\u5f97x=4]
\u4e8c\u30019\uff0eD
10\uff0eB \uff08\u70b9\u62e8\uff1a\u7528\u5206\u7c7b\u8ba8\u8bba\u6cd5\uff1a
\u5f53x\u22650\u65f6\uff0c3x=18\uff0c\u2234x=6
\u5f53x<0\u65f6\uff0c-3=18\uff0c\u2234x=-6
\u6545\u672c\u9898\u5e94\u9009B\uff09
11\uff0eD \uff08\u70b9\u62e8\uff1a\u75312ax-3=5x+b\uff0c\u5f97\uff082a-5\uff09x=b+3\uff0c\u6b32\u4f7f\u65b9\u7a0b\u65e0\u89e3\uff0c\u5fc5\u987b\u4f7f2a-5=0\uff0ca= \uff0cb+3\u22600\uff0cb\u2260-3\uff0c\u6545\u672c\u9898\u5e94\u9009D\uff0e\uff09
12\uff0eB \uff08\u70b9\u62e8\uff1b\u5728\u53d8\u5f62\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5229\u7528\u5206\u5f0f\u7684\u6027\u8d28\u5c06\u5206\u5f0f\u7684\u5206\u5b50\u3001\u5206\u6bcd\u540c\u65f6\u6269\u5927\u6216\u7f29\u5c0f\u76f8\u540c\u7684\u500d\u6570\uff0c\u5c06\u5c0f\u6570\u65b9\u7a0b\u53d8\u4e3a\u6574\u6570\u65b9\u7a0b\uff09
13\uff0eC \uff08\u70b9\u62e8\uff1a\u5f53\u7532\u3001\u4e59\u4e24\u4eba\u518d\u6b21\u76f8\u9047\u65f6\uff0c\u7532\u6bd4\u4e59\u591a\u8dd1\u4e86800\u7c73\uff0c\u5217\u65b9\u7a0b\u5f97260t+800=300t\uff0c\u89e3\u5f97t=20\uff09
14\uff0eD
15\uff0eB \uff08\u70b9\u62e8\uff1a\u7531\u516c\u5f0fS= \uff08a+b\uff09h\uff0c\u5f97b= -3=5\u5398\u7c73\uff09
16\uff0eD 17\uff0eC
18\uff0eA \uff08\u70b9\u62e8\uff1a\u6839\u636e\u7b49\u5f0f\u7684\u6027\u8d282\uff09
\u4e09\u300119\uff0e\u89e3\uff1a\u539f\u65b9\u7a0b\u53d8\u5f62\u4e3a
200\uff082-3y\uff09-4.5= -9.5
\u2234400-600y-4.5=1-100y-9.5
500y=404
\u2234y=
20\uff0e\u89e3\uff1a\u53bb\u5206\u6bcd\uff0c\u5f97
15\uff08x-1\uff09-8\uff083x+2\uff09=2-30\uff08x-1\uff09
\u223421x=63
\u2234x=3
21\uff0e\u89e3\uff1a\u8bbe\u5361\u7247\u7684\u957f\u5ea6\u4e3ax\u5398\u7c73\uff0c\u6839\u636e\u56fe\u610f\u548c\u9898\u610f\uff0c\u5f97
5x=3\uff08x+10\uff09\uff0c\u89e3\u5f97x=15
\u6240\u4ee5\u9700\u914d\u6b63\u65b9\u5f62\u56fe\u7247\u7684\u8fb9\u957f\u4e3a15-10=5\uff08\u5398\u7c73\uff09
\u7b54\uff1a\u9700\u8981\u914d\u8fb9\u957f\u4e3a5\u5398\u7c73\u7684\u6b63\u65b9\u5f62\u56fe\u7247\uff0e
22\uff0e\u89e3\uff1a\u8bbe\u5341\u4f4d\u4e0a\u7684\u6570\u5b57\u4e3ax\uff0c\u5219\u4e2a\u4f4d\u4e0a\u7684\u6570\u5b57\u4e3a3x-2\uff0c\u767e\u4f4d\u4e0a\u7684\u6570\u5b57\u4e3ax+1\uff0c\u6545
100\uff08x+1\uff09+10x+\uff083x-2\uff09+100\uff083x-2\uff09+10x+\uff08x+1\uff09=1171
\u89e3\u5f97x=3
\u7b54\uff1a\u539f\u4e09\u4f4d\u6570\u662f437\uff0e
23\uff0e\u89e3\uff1a\uff081\uff09\u7531\u5df2\u77e5\u53ef\u5f97 =0.12
A\u7ad9\u81f3H\u7ad9\u7684\u5b9e\u9645\u91cc\u7a0b\u6570\u4e3a1500-219=1281\uff08\u5343\u7c73\uff09
\u6240\u4ee5A\u7ad9\u81f3F\u7ad9\u7684\u706b\u8f66\u7968\u4ef7\u4e3a0.12\u00d71281=153.72\u2248154\uff08\u5143\uff09
\uff082\uff09\u8bbe\u738b\u5927\u5988\u5b9e\u9645\u4e58\u8f66\u91cc\u7a0b\u6570\u4e3ax\u5343\u7c73\uff0c\u6839\u636e\u9898\u610f\uff0c\u5f97 =66
\u89e3\u5f97x=550\uff0c\u5bf9\u7167\u8868\u683c\u53ef\u77e5\uff0cD\u7ad9\u4e0eG\u7ad9\u8ddd\u79bb\u4e3a550\u5343\u7c73\uff0c\u6240\u4ee5\u738b\u5927\u5988\u662f\u5728D\u7ad9\u6216G\u7ad9\u4e0b\u7684\u8f66\uff0e
24\uff0e\u89e3\uff1a\uff081\uff09\u2235103>100
\u2234\u6bcf\u5f20\u95e8\u7968\u63094\u5143\u6536\u8d39\u7684\u603b\u7968\u989d\u4e3a103\u00d74=412\uff08\u5143\uff09
\u53ef\u8282\u7701486-412=74\uff08\u5143\uff09
\uff082\uff09\u2235\u7532\u3001\u4e59\u4e24\u73ed\u5171103\u4eba\uff0c\u7532\u73ed\u4eba\u6570>\u4e59\u73ed\u4eba\u6570
\u2234\u7532\u73ed\u591a\u4e8e50\u4eba\uff0c\u4e59\u73ed\u6709\u4e24\u79cd\u60c5\u5f62\uff1a
\u2460\u82e5\u4e59\u73ed\u5c11\u4e8e\u6216\u7b49\u4e8e50\u4eba\uff0c\u8bbe\u4e59\u73ed\u6709x\u4eba\uff0c\u5219\u7532\u73ed\u6709\uff08103-x\uff09\u4eba\uff0c\u4f9d\u9898\u610f\uff0c\u5f97
5x+4.5\uff08103-x\uff09=486
\u89e3\u5f97x=45\uff0c\u2234103-45=58\uff08\u4eba\uff09
\u5373\u7532\u73ed\u670958\u4eba\uff0c\u4e59\u73ed\u670945\u4eba\uff0e
\u2461\u82e5\u4e59\u73ed\u8d85\u8fc750\u4eba\uff0c\u8bbe\u4e59\u73edx\u4eba\uff0c\u5219\u7532\u73ed\u6709\uff08103-x\uff09\u4eba\uff0c
\u6839\u636e\u9898\u610f\uff0c\u5f97
4.5x+4.5\uff08103-x\uff09=486
\u2235\u6b64\u7b49\u5f0f\u4e0d\u6210\u7acb\uff0c\u2234\u8fd9\u79cd\u60c5\u51b5\u4e0d\u5b58\u5728\uff0e
\u6545\u7532\u73ed\u4e3a58\u4eba\uff0c\u4e59\u73ed\u4e3a45\u4eba\uff0e
======================================================================
3.2 \u89e3\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff08\u4e00\uff09
\u2014\u2014\u5408\u5e76\u540c\u7c7b\u9879\u4e0e\u79fb\u9879
\u3010\u77e5\u80fd\u70b9\u5206\u7c7b\u8bad\u7ec3\u3011
\u77e5\u80fd\u70b91 \u5408\u5e76\u4e0e\u79fb\u9879
1\uff0e\u4e0b\u9762\u89e3\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u53d8\u5f62\u5bf9\u4e0d\u5bf9\uff1f\u5982\u679c\u4e0d\u5bf9\uff0c\u6307\u51fa\u9519\u5728\u54ea\u91cc\uff0c\u5e76\u6539\u6b63\uff0e
\uff081\uff09\u4ece3x-8=2\uff0c\u5f97\u52303x=2-8; \uff082\uff09\u4ece3x=x-6\uff0c\u5f97\u52303x-x=6.
2\uff0e\u4e0b\u5217\u53d8\u5f62\u4e2d\uff1a
\u2460\u7531\u65b9\u7a0b =2\u53bb\u5206\u6bcd\uff0c\u5f97x-12=10;
\u2461\u7531\u65b9\u7a0b x= \u4e24\u8fb9\u540c\u9664\u4ee5 \uff0c\u5f97x=1;
\u2462\u7531\u65b9\u7a0b6x-4=x+4\u79fb\u9879\uff0c\u5f977x=0;
\u2463\u7531\u65b9\u7a0b2- \u4e24\u8fb9\u540c\u4e58\u4ee56\uff0c\u5f9712-x-5=3\uff08x+3\uff09.
\u9519\u8bef\u53d8\u5f62\u7684\u4e2a\u6570\u662f\uff08 \uff09\u4e2a\uff0e
A\uff0e4 B\uff0e3 C\uff0e2 D\uff0e1
3\uff0e\u82e5\u5f0f\u5b505x-7\u4e0e4x+9\u7684\u503c\u76f8\u7b49\uff0c\u5219x\u7684\u503c\u7b49\u4e8e\uff08 \uff09\uff0e
A\uff0e2 B\uff0e16 C\uff0e D\uff0e
4\uff0e\u5408\u5e76\u4e0b\u5217\u5f0f\u5b50\uff0c\u628a\u7ed3\u679c\u5199\u5728\u6a2a\u7ebf\u4e0a\uff0e
\uff081\uff09x-2x+4x=__________; \uff082\uff095y+3y-4y=_________;
\uff083\uff094y-2.5y-3.5y=__________\uff0e
5\uff0e\u89e3\u4e0b\u5217\u65b9\u7a0b\uff0e
\uff081\uff096x=3x-7 \uff082\uff095=7+2x
\uff083\uff09y- = y-2 \uff084\uff097y+6=4y-3
6\uff0e\u6839\u636e\u4e0b\u5217\u6761\u4ef6\u6c42x\u7684\u503c:
\uff081\uff0925\u4e0ex\u7684\u5dee\u662f-8\uff0e \uff082\uff09x\u7684 \u4e0e8\u7684\u548c\u662f2\uff0e
7\uff0e\u5982\u679c\u65b9\u7a0b3x+4=0\u4e0e\u65b9\u7a0b3x+4k=8\u662f\u540c\u89e3\u65b9\u7a0b\uff0c\u5219k=________\uff0e
8\uff0e\u5982\u679c\u5173\u4e8ey\u7684\u65b9\u7a0b3y+4=4a\u548cy-5=a\u6709\u76f8\u540c\u89e3\uff0c\u5219a\u7684\u503c\u662f________\uff0e
\u77e5\u80fd\u70b92 \u7528\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u5206\u6790\u548c\u89e3\u51b3\u5b9e\u9645\u95ee\u9898
9\uff0e\u4e00\u6876\u8272\u62c9\u6cb9\u6bdb\u91cd8\u5343\u514b\uff0c\u4ece\u6876\u4e2d\u53d6\u51fa\u4e00\u534a\u6cb9\u540e\uff0c\u6bdb\u91cd4.5\u5343\u514b\uff0c\u6876\u4e2d\u539f\u6709\u6cb9\u591a\u5c11\u5343\u514b\uff1f
10\uff0e\u5982\u56fe\u6240\u793a\uff0c\u5929\u5e73\u7684\u4e24\u4e2a\u76d8\u5185\u5206\u522b\u76db\u670950\u514b\uff0c45\u514b\u76d0\uff0c\u95ee\u5e94\u8be5\u4ece\u76d8A\u5185\u62ff\u51fa\u591a\u5c11\u76d0\u653e\u5230\u76d8B\u5185\uff0c\u624d\u80fd\u4f7f\u4e24\u76d8\u5185\u6240\u76db\u76d0\u7684\u8d28\u91cf\u76f8\u7b49\uff0e
11\uff0e\u5c0f\u660e\u6bcf\u5929\u65e9\u4e0a7\uff1a50\u4ece\u5bb6\u51fa\u53d1\uff0c\u5230\u8ddd\u5bb61000\u7c73\u7684\u5b66\u6821\u4e0a\u5b66\uff0c\u6bcf\u5929\u7684\u884c\u8d70\u901f\u5ea6\u4e3a80\u7c73/\u5206\uff0e\u4e00\u5929\u5c0f\u660e\u4ece\u5bb6\u51fa\u53d15\u5206\u540e\uff0c\u7238\u7238\u4ee5180\u7c73/\u5206\u7684\u901f\u5ea6\u53bb\u8ffd\u5c0f\u660e\uff0c\u5e76\u4e14\u5728\u9014\u4e2d\u8ffd\u4e0a\u4e86\u4ed6\uff0e
\uff081\uff09\u7238\u7238\u8ffd\u4e0a\u5c0f\u660e\u7528\u4e86\u591a\u957f\u65f6\u95f4\uff1f
\uff082\uff09\u8ffd\u4e0a\u5c0f\u660e\u65f6\u8ddd\u79bb\u5b66\u6821\u6709\u591a\u8fdc\uff1f
\u3010\u7efc\u5408\u5e94\u7528\u63d0\u9ad8\u3011
12\uff0e\u5df2\u77e5y1=2x+8\uff0cy2=6-2x\uff0e
\uff081\uff09\u5f53x\u53d6\u4f55\u503c\u65f6\uff0cy1=y2? \uff082\uff09\u5f53x\u53d6\u4f55\u503c\u65f6\uff0cy1\u6bd4y2\u5c0f5?
13\uff0e\u5df2\u77e5\u5173\u4e8ex\u7684\u65b9\u7a0b x=-2\u7684\u6839\u6bd4\u5173\u4e8ex\u7684\u65b9\u7a0b5x-2a=0\u7684\u6839\u59272\uff0c\u6c42\u5173\u4e8ex\u7684\u65b9\u7a0b -15=0\u7684\u89e3\uff0e
\u3010\u5f00\u653e\u63a2\u7d22\u521b\u65b0\u3011
14\uff0e\u7f16\u5199\u4e00\u9053\u5e94\u7528\u9898\uff0c\u4f7f\u5b83\u6ee1\u8db3\u4e0b\u5217\u8981\u6c42\uff1a
\uff081\uff09\u9898\u610f\u9002\u5408\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b \uff1b
\uff082\uff09\u6240\u7f16\u5e94\u7528\u9898\u5b8c\u6574\uff0c\u9898\u76ee\u6e05\u695a\uff0c\u4e14\u7b26\u5408\u5b9e\u9645\u751f\u6d3b\uff0e
\u3010\u4e2d\u8003\u771f\u9898\u5b9e\u6218\u3011
15\uff0e\uff08\u6c5f\u897f\uff09\u5982\u56fe3-2\u662f\u67d0\u98ce\u666f\u533a\u7684\u65c5\u6e38\u8def\u7ebf\u793a\u610f\u56fe\uff0c\u5176\u4e2dB\uff0cC\uff0cD\u4e3a\u98ce\u666f\u70b9\uff0cE\u4e3a\u4e24\u6761\u8def\u7684\u4ea4\u53c9\u70b9\uff0c\u56fe\u4e2d\u6570\u636e\u4e3a\u76f8\u5e94\u4e24\u70b9\u95f4\u7684\u8def\u7a0b\uff08\u5355\u4f4d\uff1a\u5343\u7c73\uff09\uff0e\u4e00\u5b66\u751f\u4eceA\u5904\u51fa\u53d1\uff0c\u4ee52\u5343\u7c73/\u65f6\u7684\u901f\u5ea6\u6b65\u884c\u6e38\u89c8\uff0c\u6bcf\u4e2a\u666f\u70b9\u7684\u9017\u7559\u65f6\u95f4\u5747\u4e3a0\uff0e5\u5c0f\u65f6\uff0e
\uff081\uff09\u5f53\u4ed6\u6cbf\u8def\u7ebfA\u2014D\u2014C\u2014E\u2014A\u6e38\u89c8\u56de\u5230A\u5904\u65f6\uff0c\u5171\u7528\u4e863\u5c0f\u65f6\uff0c\u6c42CE\u7684\u957f\uff0e
\uff082\uff09\u82e5\u6b64\u5b66\u751f\u6253\u7b97\u4eceA\u5904\u51fa\u53d1\uff0c\u6b65\u884c\u901f\u5ea6\u4e0e\u5404\u666f\u70b9\u7684\u9017\u7559\u65f6\u95f4\u4fdd\u6301\u4e0d\u53d8\uff0c\u4e14\u5728\u6700\u77ed\u65f6\u95f4\u5185\u770b\u5b8c\u4e09\u4e2a\u666f\u70b9\u8fd4\u56de\u5230A\u5904\uff0c\u8bf7\u4f60\u4e3a\u4ed6\u8bbe\u8ba1\u4e00\u6761\u6b65\u884c\u8def\u7ebf\uff0c\u5e76\u8bf4\u660e\u8fd9\u6837\u8bbe\u8ba1\u7684\u7406\u7531\uff08\u4e0d\u8003\u8651\u5176\u4ed6\u56e0\u7d20\uff09\uff0e
\u7b54\u6848:
1\uff0e\uff081\uff09\u9898\u4e0d\u5bf9\uff0c-8\u4ece\u7b49\u53f7\u7684\u5de6\u8fb9\u79fb\u5230\u53f3\u8fb9\u5e94\u8be5\u6539\u53d8\u7b26\u53f7\uff0c\u5e94\u6539\u4e3a3x=2+8\uff0e
\uff082\uff09\u9898\u4e0d\u5bf9\uff0c-6\u5728\u7b49\u53f7\u53f3\u8fb9\u6ca1\u6709\u79fb\u9879\uff0c\u4e0d\u5e94\u8be5\u6539\u53d8\u7b26\u53f7\uff0c\u5e94\u6539\u4e3a3x-x=-6\uff0e
2\uff0eB [\u70b9\u62e8\uff1a\u65b9\u7a0b x= \uff0c\u4e24\u8fb9\u540c\u9664\u4ee5 \uff0c\u5f97x= \uff09
3\uff0eB [\u70b9\u62e8\uff1a\u7531\u9898\u610f\u53ef\u5217\u65b9\u7a0b5x-7=4x+9\uff0c\u89e3\u5f97x=16\uff09
4\uff0e\uff081\uff093x \uff082\uff094y \uff083\uff09-2y
5\uff0e\uff081\uff096x=3x-7\uff0c\u79fb\u9879\uff0c\u5f976x-3x=-7\uff0c\u5408\u5e76\uff0c\u5f973x=-7\uff0c\u7cfb\u6570\u5316\u4e3a1\uff0c\u5f97x=- \uff0e
\uff082\uff095=7+2x\uff0c\u53737+2x=5\uff0c\u79fb\u9879\uff0c\u5408\u5e76\uff0c\u5f972x=-2\uff0c\u7cfb\u6570\u5316\u4e3a1\uff0c\u5f97x=-1\uff0e
\uff083\uff09y- = y-2\uff0c\u79fb\u9879\uff0c\u5f97y- y=-2+ \uff0c\u5408\u5e76\uff0c\u5f97 y=- \uff0c\u7cfb\u6570\u5316\u4e3a1\uff0c\u5f97y=-3\uff0e
\uff084\uff097y+6=4y-3\uff0c\u79fb\u9879\uff0c\u5f977y-4y=-3-6\uff0c \u5408\u5e76\u540c\u7c7b\u9879\uff0c\u5f973y=-9\uff0c
\u7cfb\u6570\u5316\u4e3a1\uff0c\u5f97y=-3\uff0e
6\uff0e\uff081\uff09\u6839\u636e\u9898\u610f\u53ef\u5f97\u65b9\u7a0b\uff1a25-x=-8\uff0c\u79fb\u9879\uff0c\u5f9725+8=x\uff0c\u5408\u5e76\uff0c\u5f97x=33\uff0e
\uff082\uff09\u6839\u636e\u9898\u610f\u53ef\u5f97\u65b9\u7a0b\uff1a x+8=2\uff0c\u79fb\u9879\uff0c\u5f97 x=2-8\uff0c\u5408\u5e76\uff0c\u5f97 x=-6\uff0c
\u7cfb\u6570\u5316\u4e3a1\uff0c\u5f97x=-10\uff0e
7\uff0ek=3 [\u70b9\u62e8\uff1a\u89e3\u65b9\u7a0b3x+4=0\uff0c\u5f97x=- \uff0c\u628a\u5b83\u4ee3\u51653x+4k=8\uff0c\u5f97-4+4k=8\uff0c\u89e3\u5f97k=3]
8\uff0e19 [\u70b9\u62e8\uff1a\u22353y+4=4a\uff0cy-5=a\u662f\u540c\u89e3\u65b9\u7a0b\uff0c\u2234y= =5+a\uff0c\u89e3\u5f97a=19]
9\uff0e\u89e3\uff1a\u8bbe\u6876\u4e2d\u539f\u6709\u6cb9x\u5343\u514b\uff0c\u90a3\u4e48\u53d6\u6389\u4e00\u534a\u6cb9\u540e\uff0c\u4f59\u4e0b\u90e8\u5206\u8272\u62c9\u6cb9\u7684\u6bdb\u91cd\u4e3a\uff088-0.5x\uff09\u5343\u514b\uff0c\u7531\u5df2\u77e5\u6761\u4ef6\u77e5\uff0c\u4f59\u4e0b\u7684\u8272\u62c9\u6cb9\u7684\u6bdb\u91cd\u4e3a4.5\u5343\u514b\uff0c\u56e0\u4e3a\u4f59\u4e0b\u7684\u8272\u62c9\u6cb9\u7684\u6bdb\u91cd\u662f\u4e00\u4e2a\u5b9a\u503c\uff0c\u6240\u4ee5\u53ef\u5217\u65b9\u7a0b8-0.5x=4.5\uff0e
\u89e3\u8fd9\u4e2a\u65b9\u7a0b\uff0c\u5f97x=7\uff0e
\u7b54\uff1a\u6876\u4e2d\u539f\u6709\u6cb97\u5343\u514b\uff0e
[\u70b9\u62e8\uff1a\u8fd8\u6709\u5176\u4ed6\u5217\u6cd5]
10\uff0e\u89e3\uff1a\u8bbe\u5e94\u8be5\u4ece\u76d8A\u5185\u62ff\u51fa\u76d0x\u514b\uff0c\u53ef\u5217\u51fa\u8868\u683c\uff1a
\u76d8A \u76d8B
\u539f\u6709\u76d0\uff08\u514b\uff09 50 45
\u73b0\u6709\u76d0\uff08\u514b\uff09 50-x 45+x
\u8bbe\u5e94\u4ece\u76d8A\u5185\u62ff\u51fa\u76d0x\u514b\u653e\u5728\u76d8B\u5185\uff0c\u5219\u6839\u636e\u9898\u610f\uff0c\u5f9750-x=45+x\uff0e
\u89e3\u8fd9\u4e2a\u65b9\u7a0b\uff0c\u5f97x=2.5\uff0c\u7ecf\u68c0\u9a8c\uff0c\u7b26\u5408\u9898\u610f\uff0e
\u7b54\uff1a\u5e94\u4ece\u76d8A\u5185\u62ff\u51fa\u76d02.5\u514b\u653e\u5165\u5230\u76d8B\u5185\uff0e
11\uff0e\u89e3\uff1a\uff081\uff09\u8bbe\u7238\u7238\u8ffd\u4e0a\u5c0f\u660e\u65f6\uff0c\u7528\u4e86x\u5206\uff0c\u7531\u9898\u610f\uff0c\u5f97
180x=80x+80\u00d75\uff0c
\u79fb\u9879\uff0c\u5f97100x=400\uff0e
\u7cfb\u6570\u5316\u4e3a1\uff0c\u5f97x=4\uff0e
\u6240\u4ee5\u7238\u7238\u8ffd\u4e0a\u5c0f\u660e\u7528\u65f64\u5206\u949f\uff0e
\uff082\uff09180\u00d74=720\uff08\u7c73\uff09\uff0c1000-720=280\uff08\u7c73\uff09\uff0e
\u6240\u4ee5\u8ffd\u4e0a\u5c0f\u660e\u65f6\uff0c\u8ddd\u79bb\u5b66\u6821\u8fd8\u6709280\u7c73\uff0e
12\uff0e\uff081\uff09x=-
[\u70b9\u62e8\uff1a\u7531\u9898\u610f\u53ef\u5217\u65b9\u7a0b2x+8=6-2x\uff0c\u89e3\u5f97x=- ]
\uff082\uff09x=-
[\u70b9\u62e8\uff1a\u7531\u9898\u610f\u53ef\u5217\u65b9\u7a0b6-2x-\uff082x+8\uff09=5\uff0c\u89e3\u5f97x=- ]
13\uff0e\u89e3\uff1a\u2235 x=-2\uff0c\u2234x=-4\uff0e
\u2235\u65b9\u7a0b x=-2\u7684\u6839\u6bd4\u65b9\u7a0b5x-2a=0\u7684\u6839\u59272\uff0c
\u2234\u65b9\u7a0b5x-2a=0\u7684\u6839\u4e3a-6\uff0e
\u22345\u00d7\uff08-6\uff09-2a=0\uff0c\u2234a=-15\uff0e
\u2234 -15=0\uff0e
\u2234x=-225\uff0e
14\uff0e\u672c\u9898\u5f00\u653e\uff0c\u7b54\u6848\u4e0d\u552f\u4e00\uff0e
15\uff0e\u89e3\uff1a\uff081\uff09\u8bbeCE\u7684\u957f\u4e3ax\u5343\u7c73\uff0c\u4f9d\u636e\u9898\u610f\u5f97
1.6+1+x+1=2\uff083-2\u00d70.5\uff09
\u89e3\u5f97x=0.4\uff0c\u5373CE\u7684\u957f\u4e3a0.4\u5343\u7c73\uff0e
\uff082\uff09\u82e5\u6b65\u884c\u8def\u7ebf\u4e3aA\u2014D\u2014C\u2014B\u2014E\u2014A\uff08\u6216A\u2014E\u2014B\u2014C\u2014D\u2014A\uff09\uff0c
\u5219\u6240\u7528\u65f6\u95f4\u4e3a \uff081.6+1+1.2+0.4+1\uff09+3\u00d70.5=4.1\uff08\u5c0f\u65f6\uff09\uff1b
\u82e5\u6b65\u884c\u8def\u7ebf\u4e3aA\u2014D\u2014C\u2014E\u2014B\u2014E\u2014A\uff08\u6216A\u2014E\u2014B\u2014E\u2014C\u2014D\u2014A\uff09\uff0c
\u5219\u6240\u7528\u65f6\u95f4\u4e3a \uff081.6+1+0.4+0.4\u00d72+1\uff09+3\u00d70.5=3.9\uff08\u5c0f\u65f6\uff09\uff0e
\u6545\u6b65\u884c\u8def\u7ebf\u5e94\u4e3aA\u2014D\u2014C\u2014E\u2014B\u2014E\u2014A\uff08\u6216A\u2014E\u2014B\u2014E\u2014C\u2014D\u2014A\uff09\uff0e
======================================================================
\u4f60\u7528\u7684\u662f\u4ec0\u4e48\u7248\u672c\u7684\u6559\u6750\uff1f\u4eba\u6559\uff1f\u82cf\u6559\uff1f\u534e\u5e08\uff1f
用直接开平方法或因式分解法解方程：（1）x2 =64 （2）5x2 - =0 （3）（x+5）2=16
（4）8（3 -x）2 –72=0 （5）2y=3y2
（6）2（2x－1）－x（1－2x）=0 （7）3x(x+2)=5(x+2)
（8）（1－3y）2+2（3y－1）=0
用配方法或公式法解下列方程.：
（1）x + 2x + 3=0 （2）x + 6x－5=0
(3) x －4x+ 3=0 (4) x －2x－1 =0
(5) 2x +3x+1=0 (6) 3x +2x－1 =0
(7) 5x －3x+2 =0 (8) 7x －4x－3 =0
(9) -x -x+12 =0 (10) x －6x+9 =0
用适当方法解方程
（3-x）²+x²=5 x²+(2√3)x+3=0
把下列各式分解因式
1．xn＋4－169xn＋2 （n是自然数）
2．（a＋2b）2－10（a＋2b）＋25；
3．2xy＋9－x2－y2
（1）如果（－1－b）•M＝b2－1，则M＝_______．
（2）若x2＋ax＋b可以分解成（x＋1）（x－2），则a＝_______，b＝_______．
（3）若9x2＋2（m－4）x＋16是一个完全平方式，则m的值为_______．
（4）分解因式a2（b－c）－b＋c＝_______．
（5）分解因式xy－2y－2＋x＝_______．
（6）在实数范围内分解因式x3－4x＝_______．
把下列各式分解因式
（1）4x（a－b）＋（b2－a2）；
（2）（a2＋b2）2－4a2b2；
（3）x4＋2x2－3；
（4）（x＋y）2－3（x＋y）＋2；
（5）x3－2x2－3x；
（6）4a2－b2＋6a－3b；
ax-ay
x2-1
(2)a2-4=a2-22
(3)x2-4=x2-22
x2-9=
x2-25=
x3-9x=
x3-4x=
a3-ab2
12（2008，四川省宜宾市）因式分解：3y2-27= .
13．2a2-8b214（2008，徐州巿）因式分解：2x2-8=____2 ________
xy –x - y+1= ． ．
22．4mn(m+2n)(m-2n) 23（2008，扬州市）已知x+y=6，xy=-3，则x2y+xy2=__________________。
我可以做，怎么帮呀？
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