七年级上册去括号容易出现的难题
\u6570\u5b66\u4e03\u5e74\u7ea7\u4e0a\u518c\uff08\u53bb\u62ec\u53f7\uff09\u9898\u76ee\u7b2c\u4e00\u9898\uff1a\u539f\u5f0f=-2a²-5-3a²+2+8a²+2
=3a²-1
\u7b2c\u4e8c\u9898\uff1a\u539f\u5f0f=4b-6a-6a+9b
=13b-12a
\u7b2c\u4e09\u9898\uff1a\u539f\u5f0f=14abc-28a+18a-6abc
=8abc-10a
\u7b2c\u56db\u9898\uff1a\u539f\u5f0f=5ab-[2a²b-(3ab-4ab²+a²b)
=5ab-(2a²b-3ab+4ab²-a²b
=5ab-2a²b+3ab-4ab²+a²b
=8ab-a²b-4ab²
\u7b2c\u4e94\u9898\uff1a\u539f\u5f0f=2a²-[-3a-(4a²-3a²+a+a-a²)]
=2a²-(-3a-a-a)
=2a²+5a
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\u539f\u5f0f=4a²-(a²+4a²-2a-2a²+6a)
=4a²-3a²-4a
=a²-4a
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3.\u7edd\u5bf9\u503c\uff1a|a|=
4.\u5012\u6570\uff1aa\u7684\u5012\u6570 \uff08a\u22600\uff09
5.\u4e58\u65b9\uff1a\u76f8\u540c\u56e0\u6570\u79ef\u7684\u8fd0\u7b97\u53eb\u4e58\u65b9\uff0c\u8d1f\u6570\u7684\u5947\u6b21\u65b9\u4e3a\u8d1f\uff0c\u5076\u6b21\u65b9\u4e3a\u6b63\uff1b\u6b63\u6570\u7684\u4efb\u4f55\u6b21\u65b9\u4e3a\u6b63\uff1b0\u7684\u4efb\u4f55\u6b21\u65b9\u4e3a0.
6.\u6709\u7406\u6570\u8fd0\u7b97\uff1a\u8fd0\u7b97\u6cd5\u5219\u3001\u8fd0\u7b97\u987a\u5e8f\u3001\u8fd0\u7b97\u5f8b.
7.\u79d1\u5b66\u8bb0\u6570\u6cd5\uff1aa\u00d710n\uff081\u2264a\uff1c1\uff09.\u8fd1\u4f3c\u6570\uff0c\u7cbe\u786e\u5ea6\uff0c\u6709\u6548\u6570\u5b57.
8.\u7528\u57fa\u672c\u7684\u8fd0\u7b97\u7b26\u53f7(\u6307\u52a0\u3001\u51cf\u3001\u4e58\u3001\u9664\u3001\u4e58\u65b9\u53ca\u4eca\u540e\u8981\u5b66\u7684\u5f00\u65b9)\u628a\u6570\u6216\u8868\u793a\u6570\u7684\u5b57\u6bcd\u8fde\u63a5\u800c\u6210\u7684\u5f0f\u5b50\u53eb\u505a\u4ee3\u6570\u5f0f.
9.\u6570\u5b57\u4e0e\u5b57\u6bcd\u7684\u79ef\uff0c\u8fd9\u6837\u7684\u5f0f\u5b50\u53eb\u505a\u5355\u9879\u5f0f.
(1)\u5355\u72ec\u7684\u4e00\u4e2a\u6570\u6216\u4e00\u4e2a\u5b57\u6bcd\u4e5f\u662f\u5355\u9879\u5f0f.
(2)\u5355\u9879\u5f0f\u4e2d\u7684\u6570\u5b57\u56e0\u6570\u53eb\u505a\u8fd9\u4e2a\u5355\u9879\u5f0f\u7684\u7cfb\u6570.
(3)\u4e00\u4e2a\u5355\u9879\u5f0f\u4e2d\uff0c\u6240\u6709\u5b57\u6bcd\u7684\u6307\u6570\u7684\u548c\u53eb\u505a\u8fd9\u4e2a\u5355\u9879\u5f0f\u7684\u6b21\u6570.
10.\u51e0\u4e2a\u5355\u9879\u5f0f\u7684\u548c\u53eb\u505a\u591a\u9879\u5f0f.
(1)\u5728\u591a\u9879\u5f0f\u4e2d\uff0c\u6bcf\u4e2a\u5355\u9879\u5f0f\u53eb\u505a\u591a\u9879\u5f0f\u7684\u9879\uff0c\u5176\u4e2d\uff0c\u4e0d\u542b\u5b57\u6bcd\u7684\u9879\u53eb\u505a\u5e38\u6570\u9879.
(2)\u4e00\u822c\u5730\uff0c\u591a\u9879\u5f0f\u91cc\u6b21\u6570\u6700\u9ad8\u7684\u9879\u7684\u6b21\u6570\uff0c\u5c31\u662f\u8fd9\u4e2a\u591a\u9879\u5f0f\u7684\u6b21\u6570.
11.\u5355\u9879\u5f0f\u548c\u591a\u9879\u5f0f\u7edf\u79f0\u6574\u5f0f.
12.\u6240\u542b\u5b57\u6bcd\u76f8\u540c\uff0c\u5e76\u4e14\u76f8\u540c\u5b57\u6bcd\u7684\u6307\u6570\u4e5f\u76f8\u540c\u7684\u9879\u53eb\u505a\u540c\u7c7b\u9879\uff0c\u51e0\u4e2a\u5e38\u6570\u9879\u4e5f\u662f\u540c\u7c7b\u9879.
13.\u628a\u591a\u9879\u5f0f\u4e2d\u7684\u540c\u7c7b\u9879\u5408\u5e76\u6210\u4e00\u9879\uff0c\u53eb\u505a\u5408\u5e76\u540c\u7c7b\u9879.
14.\u79fb\u9879\u6cd5\u5219\uff1a\u628a\u7b49\u5f0f\u4e00\u8fb9\u7684\u67d0\u9879\u53d8\u53f7\u540e\u79fb\u5230\u53e6\u4e00\u8fb9\u53eb\u79fb\u9879.
15.\u4e92\u4e3a\u4f59\u89d2\uff1a\u5982\u679c\u4e24\u4e2a\u89d2\u7684\u548c\u4e3a90\u00b0\uff0c\u90a3\u4e48\u8fd9\u4e24\u4e2a\u89d2\u4e92\u4e3a\u4f59\u89d2.\u5982\u76f4\u89d2\u4e09\u89d2\u5f62ABC\u4e2d\uff0c
\u2220A\uff1d90\u00b0\uff0c\u2220B\uff1d46\u00b0\uff0c\u2220C=44\u00b0\uff0c\u90a3\u4e48\u2220B\u4e0e\u2220C\u5c31\u4e92\u4e3a\u4f59\u89d2.
16.\u4e92\u4e3a\u8865\u89d2\uff1a\u5982\u679c\u4e24\u4e2a\u89d2\u7684\u548c\u4e3a180\u00b0\uff0c\u90a3\u4e48\u8fd9\u4e24\u4e2a\u89d2\u4e92\u4e3a\u8865\u89d2.
17.\u2220\u03b1\u7684\u4f59\u89d2\u662f\uff1a90\u00b0-\u2220\u03b1\uff0c\u2220\u03b2\u7684\u8865\u89d2\u662f\uff1a180\u00b0-\u03b2
18.\u4e92\u4e3a\u4f59\u89d2\u7684\u6027\u8d28\uff1a\u540c\u89d2\u6216\u7b49\u89d2\u7684\u4f59\u89d2\u76f8\u7b49.\u4e92\u4e3a\u8865\u89d2\u7684\u6027\u8d28\uff1a\u540c\u89d2\u6216\u7b49\u89d2\u7684\u8865\u89d2\u76f8\u7b49.
\u7b2c\u4e8c\u7bc7 \u4e60\u9898\u7bc7
\u6838\u5fc3\u5b66\u4e60\u7cfb\u5217\uff08\u4e00\uff09
1.|2|\u7684\u76f8\u53cd\u6570\u662f_____\uff0c-(-2)\u7684\u76f8\u53cd\u6570\u662f \uff0c \u7684\u5012\u6570\u662f .
2.\u7edd\u5bf9\u503c\u7b49\u4e8e3\u7684\u6570\u6709____\u4e2a\uff0c\u5b83\u4eec\u662f________\uff1b\u7edd\u5bf9\u503c\u4e0d\u5927\u4e8e3\u7684\u6574\u6570\u6709____\u4e2a\uff0c\u5b83\u4eec\u662f________.
3. \u5728\u4ee3\u6570\u5f0f\uff1a \uff0c \uff0c \uff0c \uff0c \u4e2d\uff0c\u5355\u9879\u5f0f\u7684\u4e2a\u6570\u4e3a_________.\u5982\u679c \u662f\u5173\u4e8e \u3001 \u7684\u4e00\u4e2a\u5355\u9879\u5f0f\uff0c\u4e14\u7cfb\u6570\u662f9\uff0c\u6b21\u6570\u662f4\uff0c\u90a3\u4e48\u591a\u9879\u5f0f \u662f_____________\u6b21\u5f0f.
4. \u7684\u76f8\u53cd\u6570\u662f\uff08 \uff09
A\uff0e8 B\uff0e C\uff0e D\uff0e-
5\uff0e\u5355\u9879\u5f0f \u7684\u7cfb\u6570\u548c\u6b21\u6570\u5206\u522b\u662f ( )
A. B. C. D.
6. \uff1b
7. \uff1b
8.\u89e3\u65b9\u7a0b\uff1a3\uff08x\uff0d2\uff09+1=x\uff0d5\uff082x\uff0d1\uff09.
9. \u4e00\u4ef6\u5de5\u4f5c\uff0c\u7532\u5355\u72ec\u505a6\u5c0f\u65f6\u5b8c\u6210\uff0c\u4e59\u5355\u72ec\u505a12\u5c0f\u65f6\u5b8c\u6210\uff0c\u4e19\u5355\u72ec\u505a18\u5c0f\u65f6\u5b8c\u6210\uff0c\u82e5\u5148\u7531\u7532\u3001\u4e59\u5408\u505a3\u5c0f\u65f6\uff0c\u7136\u540e\u7531\u4e59\u4e19\u5408\u505a\uff0c\u95ee\u5171\u9700\u51e0\u5c0f\u65f6\u5b8c\u6210\uff1f
10.\u51fa\u79df\u8f66\u53f8\u673a\u5c0f\u674e\u67d0\u5929\u4e0b\u5348\u7684\u8425\u8fd0\u5168\u5728\u4e1c\u897f\u8d70\u5411\u7684\u4eba\u6c11\u5927\u8857\u4e0a\u8fdb\u884c\uff0c\u5982\u679c\u89c4\u5b9a\u5411\u4e1c\u4e3a\u6b63\uff0c\u5411\u897f\u4e3a\u8d1f\uff0c\u4ed6\u8fd9\u5929\u4e0b\u5348\u884c\u8f66\u91cc\u7a0b(\u5355\u4f4d\uff1a\u5343\u7c73)\u5982\u4e0b\uff1a +15\uff0c-2\uff0c+5\uff0c-l\uff0c+10\uff0c-3\uff0c-2\uff0c+12\uff0c+4\uff0c-9\uff0c+6.
(1)\u5c06\u5c0f\u674e\u4e0b\u5348\u51fa\u53d1\u5730\u8bb0\u4e3aO\uff0c\u4ed6\u5c06\u6700\u540e\u4e00\u540d\u4e58\u5ba2\u9001\u62b5\u76ee\u7684\u5730\u65f6\uff0c\u5c0f\u674e\u8ddd\u4e0b\u5348\u51fa\u8f66\u65f6\u7684\u51fa\u53d1\u70b9\u6709\u591a\u8fdc?
(2)\u82e5\u6c7d\u8f66\u8017\u6cb9\u91cf\u4e3aO.35\u5347\uff0f\u5343\u7c73\uff0c\u8fd9\u5929\u4e0b\u5348\u5c0f\u674e\u5171\u8017\u6cb9\u591a\u5c11\u5347?
\u9644\u52a0\u9898
11. \u8ba1\u7b97\uff1a
\u6838\u5fc3\u5b66\u4e60\u7cfb\u5217\uff08\u4e8c\uff09
1. \u5728\u6709\u7406\u6570\u4e2d\uff0c\u6700\u5927\u7684\u8d1f\u6574\u6570\u662f \uff0c\u6700\u5c0f\u7684\u6b63\u6574\u6570\u662f \uff0c\u6700\u5c0f\u7684\u975e\u8d1f\u6574\u6570\u662f \uff0c\u6700\u5927\u7684\u975e\u6b63\u6574\u6570\u662f .
2.\u82e5 .
\u7528\u201c\uff1e\u201d\u6216\u201c\uff1c\u201d\u53f7\u586b\u7a7a\uff1a-3 -4\uff1b-\uff08-4\uff09 - \uff1b .
3. \u4e00\u4e2a\u5173\u4e8eb\u7684\u4e8c\u6b21\u4e09\u9879\u5f0f\u7684\u4e8c\u6b21\u9879\u7cfb\u6570\u662f-2\uff0c\u4e00\u6b21\u9879\u7cfb\u6570\u662f-0.5\uff0c\u5e38\u6570\u9879\u662f3\uff0c\u5219\u8fd9\u4e2a\u591a\u9879\u5f0f\u662f_____________.\u5355\u9879\u5f0f \uff0c \uff0c \u7684\u548c\u662f___________
4\uff0e\u4e0b\u5217\u5404\u6570\u4e2d\uff0c\u662f\u8d1f\u6570\u7684\u662f ( )
A. B. C. | -9 | D. \uff0e
5\uff0e\u7528\u56db\u820d\u4e94\u5165\u6cd5\u6309\u8981\u6c42\u5bf90.05019\u5206\u522b\u53d6\u8fd1\u4f3c\u503c\uff0c\u5176\u4e2d\u9519\u8bef\u7684\u662f\uff08 \uff09
A\uff0e0.1\uff08\u7cbe\u786e\u52300.1\uff09 B\uff0e0.05\uff08\u7cbe\u786e\u5230\u767e\u5206\u4f4d\uff09
C\uff0e0.05\uff08\u4fdd\u7559\u4e24\u4e2a\u6709\u6548\u6570\u5b57\uff09 D\uff0e0.0502\uff08\u7cbe\u786e\u52300.0001\uff09
6. .
7. .
8.\u5148\u5316\u7b80\uff0c\u518d\u6c42\u503c
9.\u5c0f\u660e\u5bb6\u7c89\u5237\u623f\u95f4\uff0c\u96c7\u4f635\u4e2a\u5de5\u4eba\uff0c\u5e72\u4e8610\u5929\u624d\u5b8c\u6210\uff1b\u7528\u4e86\u67d0\u79cd\u6d82\u6599150\u5347\uff0c\u8d39\u7528\u4e3a4800\u5143\uff1b\u7c89\u5237\u9762\u79ef\u662f150\u5e73\u65b9\u7c73. \u6700\u540e\u7ed3\u7b97\u5de5\u94b1\u65f6\uff0c\u6709\u4ee5\u4e0b\u4e09\u79cd\u65b9\u6848\uff1a
\u65b9\u6848\u4e00\uff1a\u6309\u5de5\u7b97\uff0c\u6bcf\u4e2a\u5de530\u5143(1\u4e2a\u5de5\u4eba\u5e72\u4e00\u5929\u662f\u4e00\u4e2a\u5de5)\uff1b
\u65b9\u6848\u4e8c\uff1a\u6309\u6d82\u6599\u8d39\u7528\u7b97\uff0c\u6d82\u6599\u8d39\u7528\u768430%\u4f5c\u4e3a\u5de5\u94b1\uff1b
\u65b9\u6848\u4e09\uff1a\u6309\u7c89\u5237\u9762\u79ef\u7b97\uff0c\u6bcf\u5e73\u65b9\u7c73\u4ed8\u5de5\u94b112\u5143.
\u8bf7\u4f60\u5e2e\u5c0f\u660e\u51fa\u4e3b\u610f\uff0c\u5e94\u9009\u62e9\u54ea\u79cd\u65b9\u6848\u4ed8\u94b1\u6700\u5408\u7b97(\u6700\u7701)\uff1f(\u901a\u8fc7\u8ba1\u7b97\u8bf4\u660e)
10.\u67d0\u98df\u54c1\u5382\u4ece\u751f\u4ea7\u7684\u888b\u88c5\u98df\u54c1\u4e2d\u62bd\u51fa\u6837\u54c120\u888b\uff0c\u68c0\u6d4b\u6bcf\u888b\u7684\u8d28\u91cf\u662f\u5426\u7b26\u5408\u6807\u51c6\uff0c\u8d85\u8fc7\u6216\u4e0d\u8db3\u7684\u90e8\u5206\u5206\u522b\u7528\u6b63\u3001\u8d1f\u6570\u6765\u8868\u793a\uff0c\u8bb0\u5f55\u5982\u4e0b\u8868\uff1a
\u4e0e\u6807\u51c6\u8d28\u91cf\u7684\u5dee\u503c\uff08\u5355\u4f4d\uff1ag\uff09
0 1 3 6
\u888b \u6570 1 4 3 4 5 3
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\uff082\uff09\u82e5\u6bcf\u888b\u6807\u51c6\u8d28\u91cf\u4e3a150\u514b\uff0c\u5219\u62bd\u6837\u68c0\u6d4b\u7684\u603b\u8d28\u91cf\u662f\u591a\u5c11\uff1f
\u9644\u52a0\u9898
11.(1)\u5df2\u77e5 ,\u6c42 \u7684\u503c. (2) \u5df2\u77e5 ,\u6c42 \u7684\u503c.
\u6838\u5fc3\u5b66\u4e60\u7cfb\u5217\uff08\u4e09\uff09
1. \u5316\u7b80\u4e0b\u5217\u5404\u5f0f\uff1a
(1)-(+2)= \uff1b(2)-(-15)= \uff1b (3)+[-(-2)]= .
2.\u5df2\u77e5 \uff0c\u5219 _______________.\u5982\u679c\u6709\u7406\u6570a\u3001b\u6ee1\u8db3|a|=5\uff0c|b|=4\uff0c\u4e14a<b\uff0c\u90a3\u4e48a= \uff0cb= .
3.\u5316\u7b80\uff1a(1) =________; (2) =________;(3) =_______ (4) =__________;(5) =__________.
4\uff0e\u5df2\u77e5 \uff0c\u5219\u4e0b\u5217\u7b49\u5f0f\u4e0d\u6210\u7acb\u7684\u662f\uff08 \uff09
A\uff0e B\uff0e C\uff0e D\uff0e
5\uff0e\u5c0f\u65b0\u51c6\u5907\u7528\u5982\u56fe8\u7684\u7eb8\u7247\u505a\u4e00\u4e2a\u6b63\u65b9\u4f53\u793c\u54c1\u76d2\uff0c\u4e3a\u4e86\u7f8e\u89c2\uff0c\u4ed6\u60f3\u5728\u516d\u4e2a\u6b63\u65b9\u5f62\u7eb8\u7247\u4e0a\u753b\u4e0a\u56fe\u6848\uff0c\u4f7f\u505a\u6210\u540e\u4e09\u7ec4\u5bf9\u9762\u7684\u56fe\u6848\u76f8\u540c\uff0c\u90a3\u4e48\u753b\u4e0a\u56fe\u6848\u540e\u6b63\u786e\u7684\u662f\uff08 \uff09
6. .
7. \u5df2\u77e5 \uff0c \uff0c\u6c42\uff1a .
8.\u89e3\u65b9\u7a0b\uff1a .
9.\u67d0\u5de5\u5382\u7b2c\u4e00\u8f66\u95f4\u6709 \u4eba\uff0c\u7b2c\u4e8c\u8f66\u95f4\u6bd4\u7b2c\u4e00\u8f66\u95f4\u4eba\u6570\u7684 \u5c1130\u4eba\uff0c\u90a3\u4e48
\uff081\uff09\u4e24\u4e2a\u8f66\u95f4\u5171\u6709\u591a\u5c11\u4eba\uff1f
\uff082\uff09\u5982\u679c\u4ece\u7b2c\u4e8c\u8f66\u95f4\u8c03\u51fa10\u4eba\u5230\u7b2c\u4e00\u8f66\u95f4\uff0c\u8c03\u52a8\u540e\uff0c\u7b2c\u4e00\u8f66\u95f4\u7684\u4eba\u6570\u6bd4\u7b2c\u4e8c\u8f66\u95f4\u591a\u591a\u5c11\u4eba\uff1f
10.\u5317\u4eac\u67d0\u5382\u548c\u4e0a\u6d77\u67d0\u5382\u540c\u65f6\u5236\u6210\u7535\u5b50\u8ba1\u7b97\u673a\u82e5\u5e72\u53f0\uff0c\u5317\u4eac\u5382\u53ef\u652f\u63f4\u5916\u573010\u53f0\uff0c\u4e0a\u6d77\u5382\u53ef\u652f\u63f4\u5916\u57304\u53f0\uff0c\u73b0\u5728\u51b3\u5b9a\u7ed9\u91cd\u5e868\u53f0\uff0c\u6c49\u53e36\u53f0\u3002\u5982\u679c\u4ece\u5317\u4eac\u8fd0\u5f80\u6c49\u53e3\u3001\u91cd\u5e86\u7684\u8fd0\u8d39\u5206\u522b\u662f4\u767e\u5143/\u53f0\u30018\u767e\u5143/\u53f0\uff0c\u4ece\u4e0a\u6d77\u8fd0\u5f80\u6c49\u53e3\u3001\u91cd\u5e86\u7684\u8fd0\u8d39\u5206\u522b\u662f3\u767e\u5143/\u53f0\u30015\u767e\u5143/\u53f0.
\uff081\uff09\u8bbe\u4e0a\u6d77\u5382\u8fd0\u5f80\u6c49\u53e3 \u53f0\uff0c\u7528 \u8868\u793a\u603b\u8fd0\u8d39 \uff08\u767e\u5143\uff09.
(2)\u82e5\u4ece\u4e0a\u6d77\u5382\u8fd0\u5f80\u6c49\u53e32\u53f0\uff0c\u603b\u8fd0\u8d39\u662f\u591a\u5c11\u5143?
\u9644\u52a0\u9898
11. \u89c2\u5bdf\u4e0b\u5217\u7b49\u5f0f\uff08\u7b49\u5f0f\u4e2d\u7684\u201c\uff01\u201d\u662f\u4e00\u79cd\u6570\u5b66\u8fd0\u7b97\u7b26\u53f7\uff09\uff0c1\uff01\uff1d1\uff0c2\uff01\uff1d2\u00d71\uff0c3\uff01\uff1d3\u00d72\u00d71\uff0c4\uff01\uff1d4\u00d73\u00d72\u00d71\uff0c\u2026\u2026\u8bd5\u8ba1\u7b97 \u7684\u503c.
\u6838\u5fc3\u5b66\u4e60\u7cfb\u5217\uff08\u56db\uff09
1.\uff0d \u7684\u76f8\u53cd\u6570\u7684\u76f8\u53cd\u6570\u662f________;\u76f8\u53cd\u6570\u662f\u5b83\u672c\u8eab\u7684\u6570\u662f________;\u5982\u679c\u4e00\u4e2a\u6570\u7684\u7edd\u5bf9\u503c\u7b49\u4e8e\u5b83\u672c\u8eab\uff0c\u8fd9\u6837\u7684\u6570\u662f_________.
2.\u5df2\u77e5 \u548c \u4e92\u4e3a\u76f8\u53cd\u6570\u4e14 \uff0c\u5219 _______\uff0c ________.
3. \u7684\u6307\u6570\u4e3a______\u5e95\u6570\u4e3a____\uff1b \u7684\u6307\u6570\u4e3a_____\u5e95\u6570\u4e3a_____.
4\uff0e\u4e0b\u5217\u5404\u7ec4\u4e2d\u7684\u4e24\u9879\uff0c\u5c5e\u4e8e\u540c\u7c7b\u9879\u7684\u662f\uff08 \uff09
A. \u4e0e B. \u4e0e C. \u4e0e D. \u4e0e
5\uff0e\u4e0b\u5217\u8bf4\u6cd5\u6b63\u786e\u7684\u662f\uff08 \uff09
A. \u4e24\u70b9\u4e4b\u95f4\u7684\u8fde\u7ebf\u4e2d\uff0c\u76f4\u7ebf\u6700\u77ed B.\u82e5P\u662f\u7ebf\u6bb5AB\u7684\u4e2d\u70b9\uff0c\u5219AP=BP
C. \u82e5AP=BP, \u5219P\u662f\u7ebf\u6bb5AB\u7684\u4e2d\u70b9 D. \u4e24\u70b9\u4e4b\u95f4\u7684\u7ebf\u6bb5\u53eb\u505a\u8005\u4e24\u70b9\u4e4b\u95f4\u7684\u8ddd\u79bb
6. .
7. .
8.\u89e3\u65b9\u7a0b\uff1a .
9.\u5149\u534e\u519c\u673a\u79df\u8d41\u516c\u53f8\u5171\u670950\u53f0\u8054\u5408\u6536\u5272\u673a\uff0c\u5176\u4e2d\u7532\u578b20\u53f0\uff0c\u4e59\u578b30\u53f0.\u73b0\u5c06\u8fd950\u53f0\u8054\u5408\u6536\u5272\u673a\u6d3e\u5f80A\u3001B\u4e24\u5730\u533a\u6536\u5272\u5c0f\u9ea6\uff0c\u5176\u4e2d30\u53f0\u6d3e\u5f80A\u5730\u533a\uff0c20\u53f0\u6d3e\u5f80B\u5730\u533a.
\u4e24\u5730\u533a\u4e0e\u8be5\u519c\u673a\u79df\u8d41\u516c\u53f8\u5546\u5b9a\u7684\u6bcf\u5929\u7684\u79df\u8d41\u4ef7\u683c\u89c1\u4e0b\u8868\uff1a
\u6bcf\u53f0\u7532\u578b\u6536\u5272\u673a\u7684\u79df\u91d1 \u6bcf\u53f0\u4e59\u578b\u6536\u5272\u673a\u7684\u79df\u91d1
A\u5730\u533a 1800\u5143 1600\u5143
B\u5730\u533a 1600\u5143 1200\u5143
\uff081\uff09\u8bbe\u6d3e\u5f80A\u5730\u533ax\u53f0\u4e59\u578b\u8054\u5408\u6536\u5272\u673a\uff0c\u79df\u8d41\u516c\u53f8\u8fd950\u53f0\u8054\u5408\u6536\u5272\u673a\u4e00\u5929\u83b7\u5f97\u7684\u79df\u91d1\u4e3ay(\u5143)\uff0c\u5199\u51fa\u7528x\u7684\u5f0f\u5b50\u8868\u793ay\u7684\u5173\u7cfb\u5f0f.
\uff082\uff09\u5206\u522b\u6c42\u51fa\u5f53 \u7b49\u4e8e28\u300129\u300130\u65f6\u79df\u91d1y\u7684\u503c.
10.\u67d0\u5546\u5e97\u79ef\u538b\u4e86 \u4ef6\u67d0\u79cd\u5546\u54c1\uff0c\u4e3a\u4f7f\u8fd9\u6279\u8d27\u7269\u5c3d\u5feb\u8131\u624b\uff0c\u8be5\u5546\u5e97\u91c7\u53d6\u4e86\u5982\u4e0b\u9500\u552e\u65b9\u6848\uff1a\u5148\u5c06\u4ef7\u683c\u63d0\u5347\u5230\u539f\u6765\u7684 \u500d\uff0c\u518d\u4f5c\u4e09\u6b21\u964d\u4ef7\u5904\u7406\uff0c\u7b2c\u4e00\u6b21\u964d\u4ef7 \uff0c\u7b2c\u4e8c\u6b21\u964d\u4ef7 \uff0c\u7b2c\u4e09\u6b21\u518d\u964d\u4ef7 \uff0c\u4e09\u6b21\u964d\u4ef7\u5904\u7406\u9500\u552e\u60c5\u51b5\u5982\u4e0b\uff1a
\u964d\u4ef7\u6b21\u6570 \u4e00 \u4e8c \u4e09
\u9500\u552e\u4ef6\u6570
\u4e00\u62a2\u800c\u5149
\uff081\uff09\u7b2c\u4e09\u6b21\u964d\u4ef7\u540e\u7684\u4ef7\u683c\u5360\u539f\u6765\u4ef7\u683c\u7684\u767e\u5206\u6bd4\u4e3a\u591a\u5c11\uff1f
\uff082\uff09\u8be5\u5546\u54c1\u6309\u65b0\u9500\u552e\u65b9\u6848\u9500\u552e\uff0c\u76f8\u6bd4\u539f\u4ef7\u552e\u5b8c\uff0c\u54ea\u4e00\u79cd\u65b9\u6848\u66f4\u76c8\u5229\uff1f
\u9644\u52a0\u9898
11.\u5df2\u77e5a\u3001b\u90fd\u4e3a\u6709\u7406\u6570\uff0c\u6ee1\u8db3\u4ec0\u4e48\u6761\u4ef6\u65f6\uff0ca+b\u4e0ea-b\u4e92\u4e3a\u76f8\u53cd\u6570.
\u6838\u5fc3\u5b66\u4e60\u7cfb\u5217\uff08\u4e94\uff09
1.\u8ba1\u7b97\uff1a = .\uff08\u7ed3\u679c\u7528\u79d1\u5b66\u8bb0\u6570\u6cd5\u8868\u793a\uff09.\u5706\u5468\u7387=3.141592653\u2026\uff0c\u5982\u679c\u53d6\u8fd1\u4f3c\u65703.142\uff0c\u5b83\u7cbe\u786e\u5230 \u4f4d\uff0c\u6709\u6548\u6570\u5b57\u662f .
2.\u5982\u679cn\u4e3a\u6b63\u6574\u6570\uff0c\u5219(\uff0d1)2n =______\uff0c (\uff0d1) 2n\uff0b1=______.
3.\u8981\u4f7f\u591a\u9879\u5f0f \u4e0d\u542b\u4e09\u6b21\u9879\u53ca\u4e00\u6b21\u9879\uff0c\u5219 _________ ________.
4\uff0e\u82e5a\u662f\u6709\u7406\u6570\uff0c\u52192a\u4e0e3a\u7684\u5927\u5c0f\u5173\u7cfb\u662f( ).
A. 2a>3a B. 2a<3a C. 2a=3a D. \u4e0d\u80fd\u786e\u5b9a\uff0e
5. 2007\u5e7410\u670831\u65e517\u65f625\u5206\uff0c\u6211\u56fd\u7684\u9996\u9897\u7ed5\u6708\u4eba\u9020\u536b\u661f\u5ae6\u5a25\u4e00\u53f7\u7b2c\u4e09\u6b21\u8fd1\u5730\u70b9\u53d8\u8f68\uff0c\u536b\u661f\u8fdc\u5730\u70b9\u9ad8\u5ea6\u753112\u4e07\u4f59\u516c\u91cc\u63d0\u9ad8\u523037\u4e07\u4f59\u516c\u91cc\uff0c\u8fdb\u5165114\u5c0f\u65f6\u5730\u6708\u8f6c\u79fb\u8f68\u9053. \u5176\u4e2d\u6570\u636e\u201c37\u4e07\u4f59\u516c\u91cc\u201d\u7528\u79d1\u5b66\u8bb0\u6570\u6cd5\u8868\u793a\u6b63\u786e\u7684\u662f ( )
A. \u4f59\u516c\u91cc B. \u4f59\u516c\u91cc C. \u4f59\u516c\u91cc D. \u4f59\u516c\u91cc
6.\uff0823 \uff0d14 \uff0d38 \uff09\u00d7(\uff0d48).
7.\u5df2\u77e5\u591a\u9879\u5f0fA\u51cf\u53bb \u5f97 \uff0c\u6c42\u591a\u9879\u5f0fA.
8.\u5982\u679c\u65b9\u7a0b \u7684\u89e3\u4e0e\u65b9\u7a0b \u7684\u89e3\u76f8\u540c\uff0c\u6c42\u5f0f\u5b50 \u7684\u503c.
9.\u4e00\u8258\u8239\u4ece\u7532\u7801\u5934\u5230\u4e59\u7801\u5934\u987a\u6d41\u884c\u9a76\uff0c\u7528\u4e862\u5c0f\u65f6\uff1b\u4ece\u4e59\u7801\u5934\u8fd4\u56de\u7532\u7801\u5934\u9006\u6d41\u884c\u9a76\uff0c\u7528\u4e862.5\u5c0f\u65f6.\u5df2\u77e5\u6c34\u6d41\u7684\u901f\u5ea6\u662f3\u5343\u7c73/\u65f6\uff0c\u6c42\u8239\u5728\u9759\u6c34\u4e2d\u7684\u901f\u5ea6.
10.\u516c\u56ed\u95e8\u7968\u4ef7\u683c\u89c4\u5b9a\u5982\u4e0b\u8868\uff1a
\u8d2d\u7968\u5f20\u6570 1\uff5e50\u5f20 51\uff5e100\u5f20 100\u5f20\u4ee5\u4e0a
\u6bcf\u5f20\u7968\u7684\u4ef7\u683c 13\u5143 11\u5143 9\u5143
\u67d0\u6821\u521d\u4e00\uff081\uff09\u3001\uff082\uff09\u4e24\u4e2a\u73ed\u5171104\u4eba\u53bb\u6e38\u516c\u56ed\uff0c\u5176\u4e2d\uff081\uff09\u73ed\u4eba\u6570\u8f83\u5c11\uff0c\u4e0d\u8db350\u4eba\u3002\u7ecf\u4f30\u7b97\uff0c\u5982\u679c\u4e24\u4e2a\u73ed\u90fd\u4ee5\u73ed\u4e3a\u5355\u4f4d\u8d2d\u7968\uff0c\u5219\u4e00\u5171\u5e94\u4ed81240\u5143\uff0c\u95ee\uff1a
(1)\u4e24\u73ed\u5404\u6709\u591a\u5c11\u5b66\u751f\uff1f
(2)\u5982\u679c\u4e24\u73ed\u8054\u5408\u8d77\u6765\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u56e2\u4f53\u8d2d\u7968\uff0c\u53ef\u7701\u591a\u5c11\u94b1\uff1f
(3)\u5982\u679c\u521d\u4e00\uff081\uff09\u73ed\u5355\u72ec\u7ec4\u7ec7\u53bb\u6e38\u516c\u56ed\uff0c\u4f5c\u4e3a\u7ec4\u7ec7\u8005\u7684\u4f60\u5c06\u5982\u4f55\u8d2d\u7968\u624d\u6700\u7701\u94b1\uff1f
\u9644\u52a0\u9898
11.\u5b9e\u6570a\u3001b\u3001c\u5728\u6570\u8f74\u4e0a\u7684\u4f4d\u7f6e\u5982\u56fe\u6240\u793a\uff0c\u5316\u7b80|a|-|a+b|+|c-a|+|b-c|.
\u6838\u5fc3\u5b66\u4e60\u7cfb\u5217\uff08\u516d\uff09
1.\u5316\u7b80\uff1a ____________, =_______.
2\uff0e\u5df2\u77e5 \u662f\u540c\u7c7b\u9879\uff0c\u5219 \u7b49\u4e8e ________\uff0e
3\uff0e\u5728\u65b9\u7a0b3x\uff0d \uff1d5\u4e2d\uff0c\u7528\u542bx\u7684\u4ee3\u6570\u5f0f\u8868\u793ay\u4e3a\uff1ay\uff1d \uff0c\u5f53x\uff1d3\u65f6\uff0cy\uff1d .
4. \u5728\u4ee3\u6570\u5f0f \u3001 \u3001 \u3001 \u3001 \u4e2d\uff0c\u5355\u9879\u5f0f\u7684\u4e2a\u6570\u662f( )
A\uff0e1 B\uff0e2 C\uff0e3 D\uff0e
5.\u8db3\u7403\u6bd4\u8d5b\u7684\u8ba1\u5206\u89c4\u5219\uff1a\u80dc\u4e00\u573a\u5f973\u5206\uff0c\u5e73\u4e00\u573a\u5f971\u5206\uff0c\u8d1f\u4e00\u573a\u5f970\u5206\u3002\u4e00\u4e2a\u961f\u625314\u573a\u6bd4\u8d5b\uff0c\u8d1f5\u573a\u5171\u5f9719\u5206\uff0c\u90a3\u4e48\u8fd9\u4e2a\u961f\u80dc\u4e86\uff08 \uff09\u573a.
\uff08A\uff093 \uff08B\uff094 \uff08C\uff095 \uff08D\uff096
6. .
7.\u82e5|x|=2\uff0c\u6c42\u4e0b\u5f0f\u7684\u503c\uff1a3x2\uff0d\u30147x2\uff0d2\uff08x2\uff0d3x\uff09\uff0d2x\u3015.
8.\u89e3\u65b9\u7a0b\uff1a .
9\uff0e\u67d0\u8f66\u95f422\u540d\u5de5\u4eba\u751f\u4ea7\u87ba\u6bcd\u548c\u87ba\u6bcd\uff0c\u6bcf\u4eba\u6bcf\u5929\u5e73\u5747\u751f\u4ea7\u87ba\u94891200\u4e2a\u6216\u87ba\u6bcd2000\u4e2a\uff0c\u4e00\u4e2a\u87ba\u9489\u8981\u914d\u4e24\u4e2a\u87ba\u6bcd\uff0c\u4e3a\u4e86\u4f7f\u6bcf\u5929\u7684\u4ea7\u54c1\u521a\u597d\u914d\u5957\uff0c\u5e94\u8be5\u5206\u914d\u591a\u5c11\u540d\u5de5\u4eba\u751f\u4ea7\u87ba\u9489\uff0c\u591a\u5c11\u540d\u5de5\u4eba\u751f\u4ea7\u87ba\u6bcd\uff1f
10.\u5546\u573a\u8ba1\u5212\u62e8\u6b3e9\u4e07\u5143\uff0c\u4ece\u5382\u5bb6\u8d2d\u8fdb50\u53f0\u7535\u89c6\u673a\uff0c\u5df2\u77e5\u8be5\u5382\u5bb6\u751f\u4ea7\u4e09\u79cd\u4e0d\u540c\u578b\u53f7\u7684\u7535\u89c6\u673a\uff0c\u51fa\u573a\u4ef7\u5206\u522b\u4e3a\u7532\u79cd\u6bcf\u53f01500\u5143\uff0c\u4e59\u79cd\u6bcf\u53f02100\u5143\uff0c\u4e19\u79cd\u6bcf\u53f02500\u5143\uff0e
\uff081\uff09\u82e5\u5546\u573a\u540c\u65f6\u8d2d\u8fdb\u5176\u4e2d\u4e24\u79cd\u4e0d\u540c\u578b\u53f7\u7684\u7535\u89c6\u673a\u517150\u53f0\uff0c\u7528\u53bb9\u4e07\u5143\uff0c\u8bf7\u4f60\u7814\u7a76\u4e00\u4e0b\u5546\u573a\u7684\u8fdb\u8d27\u65b9\u6848\uff1b
\uff082\uff09\u82e5\u5546\u573a\u9500\u552e\u4e00\u53f0\u7532\u79cd\u7535\u89c6\u673a\u53ef\u83b7\u5229150\u5143\uff0c\u9500\u552e\u4e00\u53f0\u4e59\u79cd\u7535\u89c6\u673a\u53ef\u83b7\u5229200\u5143\uff0c\u9500\u552e\u4e00\u53f0\u4e19\u79cd\u7535\u89c6\u673a\u53ef\u83b7\u5229250\u5143\uff0e\u5728\u540c\u65f6\u8d2d\u8fdb\u4e24\u79cd\u4e0d\u540c\u578b\u53f7\u7684\u7535\u89c6\u673a\u7684\u65b9\u6848\u4e2d\uff0c\u4e3a\u4f7f\u9500\u552e\u65f6\u83b7\u5229\u6700\u591a\uff0c\u8be5\u9009\u62e9\u54ea\u79cd\u8fdb\u8d27\u65b9\u6848\uff1f
\u9644\u52a0\u9898
11. \u6bd4\u5927\u5c0f\uff1a\u246012____21\uff1b\u246123____32\uff1b\u246234____43\uff1b\u246345____54\uff1b\u246456____65\u2026\u2026
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2. \u548c \u4e92\u4e3a\u76f8\u53cd\u6570\u4e14 \uff0c\u5219 _______\uff0c _______.
3.\u4e00\u5929\u4e2d\u67098.64\u00d7104\u79d2\uff0c\u4e00\u5e74\u5982\u679c\u6309365\u5929\u8ba1\u7b97\uff0c\u4e00\u5e74\u4e2d\u6709 _________\u79d2.\uff08\u7528\u79d1\u5b66\u8bb0\u6570\u6cd5\u8868\u793a\u7ed3\u679c\u4fdd\u7559\u4e24\u4e2a\u6709\u6548\u6570\u5b57\uff09
4.\u4ee5\u4e0b\u8bf4\u6cd5\u6b63\u786e\u7684\u662f ( )
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C. \u5c0f\u534e\u7684\u4f53\u91cd\u589e\u957f\u4e86-2 kg\u8868\u793a\u5c0f\u534e\u7684\u4f53\u91cd\u51cf\u5c112 kg D. \u591a\u9879\u5f0f \u7684\u6b21\u6570\u662f3
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A. B.
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2.\u591a\u9879\u5f0f \u52a0\u4e0a _________\u7b49\u4e8e .
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4. \u7edd\u5bf9\u503c\u5927\u4e8e3\u800c\u5c0f\u4e8e7\u7684\u6240\u6709\u6574\u6570\u4e4b\u548c\u662f\uff08 \uff09.
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6.\uff0d24\u00d7 .
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8.\u89e3\u65b9\u7a0b\uff1a .
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11. \u89e3\u65b9\u7a0b\uff1a
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2\uff0e\u5355\u9879\u5f0f \u662f5\u6b21\u5355\u9879\u5f0f\uff0c\u5219x=________\uff0e\u4e00\u4e2a\u5355\u9879\u5f0f\u542bx,y\u8fd9\u4e24\u4e2a\u5b57\u6bcd,\u5e76\u4e14\u5b83\u7684\u7cfb\u6570\u4e3a \uff0c\u6b21\u6570\u4e3a4\u6b21\uff0c\u8bd5\u5199\u51fa\u8fd9\u4e2a\u5355\u9879\u5f0f_________________.
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4.\u89e3\u65b9\u7a0b \u65f6\uff0c\u53bb\u5206\u6bcd\u6b63\u786e\u7684\u662f\uff08 \uff09\uff0e
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6. .
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10. \u5168\u7403\u901a\u624b\u673a\u5361\u6536\u8d39\u6bcf\u5206\u949f0.20\u5143,\u6708\u79df\u8d39\u6bcf\u670820\u5143;\u795e\u5dde\u884c\u624b\u673a\u5361\u6ca1\u6709\u6708\u79df\u8d39,\u6bcf\u5206\u949f0.40\u5143,\u5047\u5982\u4f60\u4e70\u4e86\u4e00\u90e8\u624b\u673a:
(1)\u82e5\u4f60\u4f30\u8ba1\u6bcf\u6708\u901a\u8bdd\u65f6\u95f4\u4e3a75\u5206,\u4f60\u5e94\u9009\u62e9\u54ea\u79cd\u624b\u673a\u6536\u8d39\u5361?
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1.\u5199\u51fa\u4e00\u4e2a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff0c\u4f7f\u5b83\u7684\u89e3\u4e3a\u201523 \uff0c\u672a\u77e5\u6570\u7684\u7cfb\u6570\u4e3a\u6b63\u6574\u6570\uff0c\u65b9\u7a0b\u4e3a___________.
2.\u82e5 \u662f\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff0c\u5219m=__________.\u5173\u4e8e \u7684\u65b9\u7a0b3 +5=0\u4e0e3 +3 =1\u7684\u89e3\u76f8\u540c\uff0c\u5219 =_________.
3.\u4e00\u5546\u5e97\u628a\u67d0\u5546\u54c1\u6309\u6807\u4ef7\u7684\u4e5d\u6298\u51fa\u552e\u4ecd\u53ef\u83b7\u5f9720%\u7684\u5229\u6da6\u7387\uff0c\u82e5\u8be5\u5546\u54c1\u7684\u8fdb\u4ef7\u662f\u6bcf\u4ef630\u5143\uff0c\u5219\u6807\u4ef7\u662f\u6bcf\u4ef6___________\u5143\uff0e
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6.10\uff0d \uff1b
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8. \u89e3\u65b9\u7a0b\uff1a .
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7.\u5316\u7b80\uff1a .
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(1)\u524d8\u573a\u6bd4\u8d5b\u4e2d,\u8fd9\u652f\u7403\u961f\u5171\u80dc\u4e86\u591a\u5c11\u573a?
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1. \u7684\u7cfb\u6570\u662f_____________\uff0c\u6b21\u6570\u662f_____________. \u4e00\u4e2a\u5173\u4e8eb\u7684\u4e8c\u6b21\u4e09\u9879\u5f0f\u7684\u4e8c\u6b21\u9879\u7cfb\u6570\u662f-2\uff0c\u4e00\u6b21\u9879\u7cfb\u6570\u662f-0.5\uff0c\u5e38\u6570\u9879\u662f3\uff0c\u5219\u8fd9\u4e2a\u591a\u9879\u5f0f\u662f_____________\u3002
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6. 6\u00f7\uff08\uff0d2\uff09 \uff08\uff0d4\uff09\u00d7 .
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(1)__________, (2)__________, (3)_________.
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1\uff0e\u8ba1\u7b97\uff1a ___________________\uff0e
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6. .
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OF \u5e73\u5206\u2220AOE, \u2220COF=34\u00b0,\u6c42\u2220BOD\u7684\u5ea6\u6570.
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A\uff0e\u5706\u67f1 B \u7403 C \u5706\u9525 D \u4e09\u68f1\u9525
5.\u4e8c\u4e2d\u5b66\u8fdb\u884c\u4e49\u52a1\u52b3\u52a8\uff0c\u53bb\u7532\u5904\u52b3\u52a8\u7684\u670930\u4eba\uff0c\u53bb\u4e59\u5904\u52b3\u52a8\u7684\u670924\u4eba\uff0c\u4ece\u4e59\u5904\u8c03\u4e00\u90e8\u5206\u4eba\u5230\u7532\u5904\uff0c\u4f7f\u7532\u5904\u4eba\u6570\u662f\u4e59\u5904\u4eba\u6570\u76842\u500d\uff0c\u82e5\u8bbe\u5e94\u4ece\u4e59\u5904\u8c03x\u4eba\u5230\u7532\u5904\uff0c\u5219\u6240\u5217\u65b9\u7a0b\u662f ( )
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8.\u89e3\u65b9\u7a0b\uff1a .
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1.括号前面有"+"号,把括号和它前面的"+"号去掉,括号里各项的符号不改变
2.括号前面是"-"号,把括号和它前面的"-"号去掉,括号里各项的符号都要改变
去括号法则的依据实际是乘法分配率
注: 要注意括号前面的符号,它是去括号后括号内各项是否变号的依据.
去括号时应将括号前的符号连同括号一起去掉.
要注意,括号前面是"-"时,去掉括号后,括号内的各项均要改变符号,不能只改变括号内第一项或前几项的符号,而忘记改变其余的符号.
若括号前是数字因数时,应利用乘法分配律先将数与括号内的各项分别相乘再去括号,以免发生错误.
遇到多层括号一般由里到外,逐层去括号,也可由外到里.数"-"的个数.
2例题
例1:先去括号,再合并同类项
(1) 5a-(2a-4b) ;
(2) 2x2+3(2x-x2)
(3) 4+7(2x+8x)
解:(1)5a-(2a-4b)
=5a-2a+4b
=3a+4b
(2)2x2+3(2x-x2)
=2x2+6x-3x2
=-x2+6x
(3)4+7(2x+8x)
=4+14x+56x
=4+70x
例题:先去括号,再合并同类项
a-(2a-b)-(a+2b)
-(x2-y2)+(-4x2-1)-(x2+y2)
(x2-y2)-4(2x2-3y)
2(5a2-2ab)-3(3a2+4ab-b2)
计算:4xy-3x2y-{3x2y+xy2-
[2xy2-4x2y+(x2y-2xy2)]}
化简
(a2-b2)-2(3a2-2b2)
(8x-3y)-(4x+3y-z)+2z
2m-3n+[5m-(3m-n)]
-(2a-b)-{b-[a-(2a-b)]}
已知m-n=3,
求4(m-n)-3m+3n+5的值
去问老师啊
绛旓細锛1锛夎В锛鍘绘嫭鍙2x=1800-3x 锛3 锛夎В锛200x=300x-600 绉婚」2x+3x=1800 200x-300x=-600 鍚堝苟鍚岀被椤 5x=1800 -100x=-600 绯绘暟鍖栦负 1 x=360 x=6 锛2锛夌粨鏋滀笌绗竴棰樹竴鏍
绛旓細7(2x-1)-3(4x-1)=4(3x+2)-1;(5y+1)+ (1-y)= (9y+1)+ (1-3y);20%+(1-20%)(320-x)=320脳40 2(x-2)+2=x+1 2(x-2)-3(4x-1)=9(1-x)x/3 -5 = (5-x)/2 2(x+1) /3=5(x+1) /6 -1 (1/5)x +1 =(2x+1)/4 (5-2)/2 - (4+x)/3 =1 ...
绛旓細鍘绘嫭鍙鏃跺簲灏嗘嫭鍙峰墠鐨勭鍙疯繛鍚屾嫭鍙蜂竴璧峰幓鎺.瑕佹敞鎰,鎷彿鍓嶉潰鏄"-"鏃,鍘绘帀鎷彿鍚,鎷彿鍐呯殑鍚勯」鍧囪鏀瑰彉绗﹀彿,涓嶈兘鍙敼鍙樻嫭鍙峰唴绗竴椤规垨鍓嶅嚑椤圭殑绗﹀彿,鑰屽繕璁版敼鍙樺叾浣欑殑绗﹀彿.鑻ユ嫭鍙峰墠鏄暟瀛楀洜鏁版椂,搴斿埄鐢ㄤ箻娉曞垎閰嶅緥鍏堝皢鏁颁笌鎷彿鍐呯殑鍚勯」鍒嗗埆鐩镐箻鍐嶅幓鎷彿,浠ュ厤鍙戠敓閿欒.閬囧埌澶氬眰鎷彿涓鑸敱閲屽埌澶,閫愬眰鍘...
绛旓細闄や簡鍩烘湰鐨鍘绘嫭鍙娉曞垯锛岃繕鏈変竴浜涙墿灞曠殑鍘绘嫭鍙锋硶鍒欍備緥濡傦紝褰撴嫭鍙峰墠闈㈡湁涔樺彿鏃讹紝鍘绘嫭鍙锋椂鎷彿鍐呯殑鍚勯」閮借涔樹互鎷彿鍓嶉潰鐨勬暟銆傚綋鎷彿鍓嶉潰鏈夐櫎鍙锋椂锛屽幓鎷彿鏃舵嫭鍙峰唴鐨勫悇椤归兘瑕侀櫎浠ユ嫭鍙峰墠闈㈢殑鏁般傝繖浜涙墿灞曠殑娉曞垯閮芥槸鍦ㄥ熀鏈殑鍘绘嫭鍙锋硶鍒欏熀纭涓杩涜鎵╁睍鍜屽欢浼哥殑銆傚湪涓冨勾绾х殑鏁板璇剧▼涓紝鍘绘嫭鍙锋硶鍒欐槸涓涓潪甯搁噸瑕...
绛旓細鍗冪背/鏃讹紱浠庝笂鍗8鐐瑰埌10鐐硅繖涓や釜灏忔椂锛屽鏋滆A銆丅涓ゅ湴鐩歌窛x鍗冪背锛屽彲鐭ヤ袱浜轰竴鍏辫蛋浜(x-36)鍗冪背锛屼篃鍙眰鍑涓や汉鐨勯熷害鍜屼负(x-36)/(10-8)鍗冪背/鏃躲傜患涓鎵杩帮紝鏍规嵁涓や汉鐨勯熷害鍜屼笉鍙橈紝鍒楁柟绋嬩负(x-36)/(10-8)=(36+36)/(12-10) 锛岃В寰梮=108 锛屾墍浠锛孊涓ゅ湴鐨勮矾绋嬩负108鍗冪背銆
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绛旓細涓冨勾绾鏁板鎺㈢┒璇婃柇,鏁村紡鍚堝苟鍚岀被椤鍘绘嫭鍙,姹傝繖涓夐亾绛旀,瑕佹湁杩囩▼ 3涓洖绛 #鐑# 浣犺寰楀悓灞呬細鏇瀹规槗璁╂劅鎯呭彉娣″悧?cscsqaz 2014-10-11 鐭ラ亾绛斾富 鍥炵瓟閲:8 閲囩撼鐜:0% 甯姪鐨勪汉:6.9涓 鎴戜篃鍘荤瓟棰樿闂釜浜洪〉 鍏虫敞 灞曞紑鍏ㄩ儴 鏈洖绛旂敱鎻愰棶鑰呮帹鑽 宸茶禐杩 宸茶俯杩< 浣犲杩欎釜鍥炵瓟鐨勮瘎浠锋槸? 璇勮 鏀惰捣 ...
绛旓細7.鍘绘嫭鍙锛屽苟鍚堝苟鍚岀被椤癸細(1)-2n-(3n-1);(2)a-(5a-3b)+(2b-a);(3)-3(2s-5)+6s;(4)1-(2a-1)-(3a+3).銆愯В銆戙(1)鍘熷紡=-2n-3n+1=-5n+1.(2)鍘熷紡=a-5a+3b+2b-a=-5a+5b.(3)鍘熷紡=-6s+15+6s=15.(4)鍘熷紡=1-2a+1-3a-3=-5a-1.(绗8棰)8.鏈夌悊鏁癮锛宐锛...
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