七年级数学急急急急（月考）
\u4e03\u5e74\u7ea7\u4e0b\u6570\u5b66\u7b2c\u4e00\u6b21\u6708\u8003\u4e03\u5e74\u7ea7\u6570\u5b66
\u4e0b\u5b66\u671f\u7b2c\u4e00\u6b21\u6708\u8003\u8bd5\u9898
\uff08\u65f6\u95f4\uff1a120\u5206\u949f \u6ee1\u5206\uff1a120\u5206\uff09
\u9898\u53f7 \u4e00 \u4e8c \u4e09 \u603b\u5206
\u5f97\u5206
\u4e00\u3001\u9009\u62e9\u98983\u5206\u517130\u5206\uff09
1\uff0e\u4ee3\u6570\u5f0f: \u5355\u9879\u5f0f\u5171\u6709( )\u4e2a.
A\uff0e1\u4e2a B\uff0e2\u4e2a C\uff0e3\u4e2a D\uff0e4\u4e2a
2\uff0e\u5355\u9879\u5f0f \u7684\u7cfb\u6570\u548c\u6b21\u6570\u5206\u522b\u4e3a\uff08 \uff09
A. - \uff0c2 B.- \uff0c3 C. \uff0c2 D. \uff0c3
3\uff0e\u4e0b\u5217\u8bed\u53e5\u4e2d\u9519\u8bef\u7684\u662f\uff08 \uff09
A.\u6570\u5b57 0 \u4e5f\u662f\u5355\u9879\u5f0f B.\u5355\u9879\u5f0f a \u7684\u7cfb\u6570\u4e0e\u6b21\u6570\u90fd\u662f 1
C. \u7684\u7cfb\u6570\u662f D. \u662f\u4e8c\u6b21\u5355\u9879\u5f0f
4. \u4e0b\u5217\u5f0f\u5b50\u53ef\u7528\u5e73\u65b9\u5dee\u516c\u5f0f\u8ba1\u7b97\u7684\u662f\uff1a\uff08 \uff09
A\uff0e B\uff0e C\uff0e D\uff0e
5. \u4e0b\u5217\u8fd0\u7b97\u4e0d\u6b63\u786e\u7684\u662f\uff08 \uff09
A\uff0e B\uff0e C\uff0e D\uff0e
6\uff0e\u6768\u8001\u5e08\u505a\u4e86\u4e2a\u957f\u65b9\u5f62\u6559\u5177\uff0c\u5176\u4e2d\u4e00\u8fb9\u957f\u4e3a \uff0c\u53e6\u4e00\u8fb9\u4e3a \uff0c\u5219\u8be5\u957f\u65b9\u5f62\u5468\u957f\u4e3a\uff08 \uff09
A\uff0e B\uff0e C\uff0e D\uff0e
7.\u4e0b\u9762\u4e24\u6574\u5f0f\u76f8\u4e58\u7684\u7ed3\u679c\u4e3a \u7684\u662f\uff08 \uff09
A\uff0e B\uff0e C\uff0e D\uff0e
8\uff0e\u5c0f\u660e\u5728\u5229\u7528\u5b8c\u5168\u5e73\u65b9\u516c\u5f0f\u8ba1\u7b97\u4e00\u4e2a\u4e8c\u9879\u6574\u5f0f\u7684\u5e73\u65b9\u65f6\uff0c\u4e0d\u5c0f\u5fc3\u7528\u58a8\u6c34\u628a\u6700\u540e\u4e00\u9879\u67d3\u9ed1\u4e86\uff0c\u5f97\u5230\u6b63\u786e\u7684\u7ed3\u679c\u53d8\u4e3a \uff08 \uff09\uff0c\u4f60\u89c9\u5f97\u8fd9\u4e00\u9879\u5e94\u662f\uff1a\uff08 \uff09
A\uff0e B\uff0e C\uff0e D\uff0e
9.\u8ba1\u7b97 \u7684\u7ed3\u679c\u662f ( )
A\uff0e B\uff0e C\uff0e D\uff0e\u4ee5\u4e0a\u7b54\u6848\u90fd\u4e0d\u5bf9
10.\u8ba1\u7b97 \u7684\u7ed3\u679c\uff0c\u6b63\u786e\u7684\u662f\uff08 \uff09
A. B. C. D.
13.\u5982\u56fe9\u6240\u793a\uff0c\u4e0d\u80fd\u63a8\u51faAD\u2016BC\u7684\u662f
A.\u2220DAB+\u2220ABC=180\u00b0 B.\u22202=\u22204
C.\u22201=\u22203 D.\u2220CBE=\u2220DAE
\u4e8c\u3001\u586b\u7a7a\u9898\uff08\u6bcf\u98983\u5206\uff0c\u517124\u5206\uff09
11. = \u3002
12. \u3002
13. = \u3002
14\uff0e\u82e5\u5355\u9879\u5f0f \u662f\u540c\u7c7b\u9879\uff0c\u5219 \u3002
15\uff0e\u8ba1\u7b97\uff1a = \u3002
16\uff0e\u82e5 \u3002
11\uff0e\u5982\u56fe\u6240\u793a\uff0c\u76f4\u7ebfa \u3001b\u88ab\u76f4\u7ebfc\u6240\u622a\uff0c\u73b0\u7ed9\u51fa\u4e0b
\u5217\u56db\u79cd\u6761\u4ef6\uff1a\u2460\u22202=\u22206\u2461\u22202=\u22208\u2462\u22201+\u22204=180\u00b0
\u2463\u22203=\u22208\uff0c\u5176\u4e2d\u80fd\u5224\u65ad\u662fa\u2016b\u7684\u6761\u4ef6\u7684\u5e8f\u53f7\u662f\uff08 \uff09
A\uff0e\u2460\u2461 B\uff0e\u2460\u2462 C\uff0e\u2460\u2463 D\uff0e\u2462\u2463
17\uff0e\u5df2\u77e5(2007- )0 + = \u3002
18\uff0e\u4e0b\u56fe\u662f\u67d0\u540c\u5b66\u5728\u6c99\u6ee9\u4e0a\u7528\u77f3\u4e8e\u6446\u6210\u7684\u5c0f\u623f\u5b50\uff1a
\u89c2\u5bdf\u56fe\u5f62\u7684\u53d8\u5316\u89c4\u5f8b\uff0c\u5199\u51fa\u7b2cn\u4e2a\u5c0f\u623f\u5b50\u7528\u4e86 \u5757\u77f3\u5b50\uff0e
\u4e09\u3001\u89e3\u7b54\u9898\uff08\u517166\u5206\uff09
21. \uff08\u6bcf\u98984\u5206\uff09
\uff081\uff09\uff08 \uff082\uff09
\uff083\uff09 \uff084\uff09
22. \uff08\u6bcf\u98985\u5206\uff09
\uff081\uff09\uff08 \uff082\uff09
\uff083\uff09 \uff084\uff09
23.\uff086\u5206\uff09\u5df2\u77e5 \uff0c \uff0c\u6c42 \u3002
24.\uff088\u5206\uff09\u5148\u5316\u7b80\uff0c\u518d\u6c42\u503c \uff0c\u5176\u4e2d \uff0c
25.\uff088\u5206\uff09
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\u4e3a \u3002\uff08\u7528\u5f0f\u5b50\u8868\u8fbe\uff09
\uff082\uff09\u8fd0\u7528\u4f60\u6240\u5b66\u5230\u7684\u516c\u5f0f\uff0c\u8ba1\u7b97\u4e0b\u5217\u5404\u9898\uff1a
\u2460 \u2461
26.\uff088\u5206\uff09\u5c0f\u660e\u5728\u505a\u4e00\u9053\u6570\u5b66\u9898\uff1a\u201c\u4e24\u4e2a\u591a\u9879\u5f0fA\u548cB\uff0c\u5176\u4e2dB=3a2-5a-7,\u8bd5\u6c42A+2B\u65f6\u201d\uff0c\u9519\u8bef\u5730\u5c06A+2B\u770b\u6210\u4e86A-2B\uff0c\u7ed3\u679c\u6c42\u51fa\u7684\u7b54\u6848\u662f\uff1a-2a2+3a+6,\u4f60\u80fd\u5e2e\u4ed6\u8ba1\u7b97\u51fa\u6b63\u786e\u7684A+2B\u7684\u7b54\u6848\u5417\uff1f\uff08\u5199\u51fa\u8ba1\u7b97\u8fc7\u7a0b\uff09
\u521d\u4e00\u6570\u5b66\u6708\u8003\u8bd5\u9898 \u4e00\u3001 \u7cbe\u5fc3\u9009\u4e00\u9009\uff0c\u6bcf\u9898\u53ea\u6709\u4e00\u4e2a\u7b54\u6848\u662f\u6b63\u786e\u7684\uff0c\u8bf7\u770b\u5b8c\u56db\u4e2a\u9009\u9879\u540e\u518d\u505a \u51b3\u5b9a\u5440\uff01\uff08\u6bcf\u98983\u5206\uff0c \u517136\u5206\uff09 \u9898\u53f7 1 2 3 4 5 6 7 8 9 10 11 12 \u5f97\u5206 \u7b54\u6848 1\u3001\u4e0b\u5217\u8bf4\u6cd5\u6b63\u786e\u7684\u662f\uff08B\uff09 A \u6b63\u6570\u548c\u8d1f\u6570\u7edf\u79f0\u6709\u7406\u6570\uff1b B 0\u662f\u6574\u6570\u4f46\u4e0d\u662f\u6b63\u6570\uff1b C 0\u3002
是3²+2×1，确定2ab前的符号过程如下：（a-b）²=a²+b²-2ab
所以 a²+b²=（a-b）²+2ab
即 a²+b²=3²+2×1
88
(a-b)^2=9
a^2-2*ab+b^2=9
a^2+b^2=9+2*ab
a^2+b^2=11
(a-b)²=a²+b²-2ab=9
a²+b²=9+2×1=11
1.(a-b)^2=9
a^2-2*ab+b^2=9
a^2+b^2=9+2*ab
a^2+b^2=11
绛旓細鏄3²+2脳1锛岀‘瀹2ab鍓嶇殑绗﹀彿杩囩▼濡備笅锛氾紙a-b锛²=a²+b²-2ab 鎵浠 a²+b²=锛坅-b锛²+2ab 鍗 a²+b²=3²+2脳1
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