初二二元一次方程组实际问题 初二二元一次方程组问题
\u521d\u4e8c\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\u5e94\u7528\u989820\u4e2a\u8fd9\u513f\u53ef\u4e0d\u6b6220\u9053\uff01
1.\u4e3d\u4e3d\u548c\u5bb6\u5bb6\u53bb\u4e66\u5e97\u4e70\u4e66\uff0c\u4ed6\u4eec\u540c\u65f6\u559c\u6b22\u4e0a\u4e86\u4e00\u672c\u4e66\uff0c\u6700\u540e\u4e3d\u4e3d\u7528\u81ea\u5df1\u7684\u94b1\u76845\u5206\u4e4b3\uff0c\u5bb6\u5bb6\u7528\u81ea\u5df1\u7684\u94b1\u76843\u5206\u4e4b2\u5404\u4e70\u4e86\u4e00\u672c\uff0c\u4e3d\u4e3d\u5269\u4e0b\u7684\u94b1\u6bd4\u5bb6\u5bb6\u5269\u4e0b\u7684\u94b1\u591a5\u5757\u3002\u4e24\u4eba\u539f\u6765\u5404\u6709\u591a\u5c11\u94b1\uff1f\u4e66\u591a\u5c11\u94b1\uff1f
\u8bbe\u4e3d\u4e3d\u6709x\u5143\u94b1 \u5bb6\u5bb6\u6709y\u5143\u94b1 \u5f97\u51fa\uff1a
3/5x=2/3y
2/5x=1/3y+5 \uff08\u4e3d\u4e3d\u5269\u4e0b2/5 \u5bb6\u5bb6\u5269\u4e0b1/3\uff09
\u89e32\u5143\u4e00\u6b21\u65b9\u7a0b\u5f97x=50 y=45 \u5373\u4e3d\u4e3d50\u5143 \u5bb6\u5bb645\u5143 \u4e6630\u5143\u4e00\u672c
2.\u4e00\u8f86\u6c7d\u8f66\u6bcf\u884c8\u5343\u7c73\u8981\u8017\u6cb94/5\u5343\u514b,\u5e73\u5747\u6bcf\u5343\u514b\u6c7d\u6cb9\u53ef\u884c\u591a\u5c11\u5343\u7c73.\u884c1\u5343\u7c73\u8def\u7a0b\u8981\u8017\u6cb9\u591a\u5c11\u5343\u514b?
8\u96644/5=10\uff08km/)
4/5\u96648=0.1\uff08kg)
3.\u4e00\u8f86\u6469\u6258\u8f661/2\u5c0f\u65f6\u884c30\u5343\u7c73,\u4ed6\u6bcf\u5c0f\u65f6\u884c\u591a\u5c11\u5343\u7c73?\u4ed6\u884c1\u5343\u7c73\u8981\u591a\u5c11\u5c0f\u65f6 ?
30\u00f71/2=60\u5343\u7c73 1\u00f760=1/60\u5c0f\u65f6
4.\u9605\u89c8\u5ba4\u770b\u4e66\u7684\u540c\u5b66\u4e2d\uff0c\u7537\u540c\u5b66\u5360\u4e03\u5206\u4e4b\u56db\uff0c\u4ece\u9605\u89c8\u5ba4\u8d70\u51fa5\u4f4d\u7537\u540c\u5b66\u540e\uff0c\u770b\u4e66\u7684\u540c\u5b66\u4e2d\uff0c\u5973\u540c\u5b66\u5360\u4e8c\u5341\u4e09\u5206\u4e4b\u5341\u4e8c\uff0c\u539f\u6765\u9605\u89c8\u5ba4\u4e00\u5171\u6709\u591a\u5c11\u540d\u540c\u5b66\u5728\u770b\u4e66\uff1f
\u539f\u6765\u6709x\u540d\u540c\u5b66\uff0c\u5973\u751f\u6570\u4e0d\u53d8\uff0c\u6240\u4ee5\uff081-4/7\uff09x=\uff08x-5\uff09*12/23
\u6c42\u51fax=28
5.\u7ea2\uff0c\u9ec4\uff0c\u84dd\u6c14\u7403\u5171\u670962\u53ea\uff0c\u5176\u4e2d\u7ea2\u6c14\u7403\u7684\u4e94\u5206\u4e4b\u4e09\u7b49\u4e8e\u9ec4\u6c14\u7403\u7684\u4e09\u5206\u4e4b\u4e8c\uff0c\u84dd\u6c14\u7403\u670924\u53ea\uff0c\u7ea2\u6c14\u7403\u548c\u9ec4\u6c14\u7403\u5404\u6709\u591a\u5c11\u53ea\uff1f
62-24=38(\u53ea\uff09
3/5\u7ea2=2/3\u9ec4
9\u7ea2=10\u9ec4 \u7ea2:\u9ec4=10:9
38/(10+9)=2
\u7ea2:2*10=20
\u9ec4:20*9=18
6.\u5b66\u6821\u9605\u89c8\u5ba4\u670936\u540d\u5b66\u751f\u770b\u4e66,\u5176\u4e2d4/9\u662f\u5973\u5b66\u751f.\u540e\u53c8\u6765\u4e86\u51e0\u540d\u5973\u5b66\u751f,\u8fd9\u65f6\u5973\u5b66\u751f\u4eba\u6570\u5360\u770b\u4e66\u4eba\u6570\u76843/5,\u540e\u6765\u4e86\u51e0\u540d\u5973\u751f?
\u539f\u6709\u5973\u751f:36\u00d74/9=16(\u4eba)
\u539f\u6709\u7537\u751f:36-16=20(\u4eba)
\u540e\u6709\u603b\u4eba\u6570:20\u00f7(1-3/5)=50(\u4eba)
\u540e\u6709\u5973\u751f:50\u00d73/5=30(\u4eba)
\u6765\u5973\u751f\u4eba\u6570:30-16=14(\u4eba)
7.\u6c34\u7ed3\u6210\u51b0\u540e,\u4f53\u79ef\u8981\u6bd4\u539f\u6765\u81a8\u80c011\u5206\u4e4b1,2.16\u7acb\u65b9\u7c73\u7684\u51b0\u878d\u5316\u6210\u6c34\u540e,\u4f53\u79ef\u662f\u591a\u5c11?
2.16/\uff081+1/11\uff09=1.98(\u7acb\u65b9\u7c73\uff09
8.\u7532\u4e59\u7684\u7cae\u98df560\u5428,\u5982\u679c\u628a\u7532\u7684\u7cae\u98df\u8fd0\u51fa2/9\u7ed9\u4e59,\u5219\u7532\u4e59\u7684\u7cae\u98df\u6b63\u597d\u76f8\u7b49.\u539f\u6765\u7532\u7684\u7cae\u98df\u6709\u591a\u5c11\u5428\uff1f\uff0c\u4e59\u7684\u7cae\u98df\u6709\u591a\u5c11\u5428\uff1f
\u73b0\u5728\u7532\u4e59\u5404\u6709
560\u00f72\uff1d280\u5428
\u539f\u6765\u7532\u6709
280\u00f7\uff081\uff0d2/9\uff09\uff1d360\u5428
\u539f\u6765\u4e59\u6709
560\uff0d360\uff1d200\u5428
9.\u7535\u89c6\u673a\u964d\u4ef7200\u5143.\u6bd4\u539f\u6765\u4fbf\u5b9c\u4e862/11.\u73b0\u5728\u8fd9\u79cd\u7535\u89c6\u673a\u7684\u4ef7\u683c\u662f\u591a\u5c11\u94b1?
\u539f\u4ef7\u662f
200\u00f72/11\uff1d2200\u5143
\u73b0\u4ef7\u662f
2200\uff0d200\uff1d2000\u5143
10\u3002\u4e00\u8f86\u8f66\u4ece\u7532\u5730\u5230\u4e59\u5730,\u884c\u4e86\u5168\u7a0b\u76842/5\u8fd8\u591a20\u5343\u7c73,\u8fd9\u65f6\u5019\u79bb\u4e59\u5730\u8fd8\u670970\u5343\u7c73,\u7532\u4e59\u4e24\u5730\u76f8\u8ddd\u591a\u5c11\u5343\u7c73?
\u5168\u7a0b\u7684
1\uff0d2/5\uff1d3/5
\u662f
20\uff0b70\uff1d90\u5343\u7c73
\u7532\u4e59\u4e24\u5730\u76f8\u8ddd
90\u00f73/5\uff1d150\u5343\u7c73
11.\u5c0f\u660e\u770b\u4e00\u672c\u4e66,\u7b2c\u4e00\u5929\u770b\u4e8628\u9875,\u7b2c\u4e8c\u5929\u770b\u4e86\u5168\u4e66\u76841/5(5\u5206\u4e4b1),\u4e24\u5929\u5171\u770b\u4e86\u5168\u4e66\u76843/8(3\u5206\u4e4b8),\u8fd9\u672c\u4e66\u5171\u6709\u591a\u5c11\u9875\uff1f
\u7b2c\u4e00\u5929\u770b\u7684\u5360\u5168\u4e66\u7684
3/8\uff0d1/5\uff1d7/40
\u8fd9\u672c\u4e66\u5171\u6709
28\u00f77/40\uff1d160\u9875
12.\u5e08\u5f92\u4e8c\u4eba\u540c\u52a0\u5de5\u4e00\u6279\u96f6\u4ef6,\u52a0\u5de5\u4e00\u6bb5\u65f6\u95f4\u540e,\u5e08\u5085\u52a0\u5de5\u4e8684\u4e2a.\u5f92\u5f1f\u52a0\u5de5\u4e8663\u4e2a.\u5e08\u5085\u6bd4\u5f92\u5f1f\u591a\u52a0\u5de5\u7684\u6b63\u597d\u5360\u5168\u90e8\u4efb\u52a1\u76841/28.\u8fd9\u6279\u96f6\u4ef6\u5171\u6709\u591a\u5c11\u4e2a?
\u5047\u8bbe\u8fd9\u6279\u96f6\u4ef6\u5171\u6709X\u4e2a
1/28X=84-63
1/28X=19
X=532
\u6240\u4ee5\u8fd9\u6279\u96f6\u4ef6\u5171\u6709532\u4e2a\u3002
13.\u4e00\u6876\u6cb9,\u5403\u4e867/10\u540e,\u53c8\u6dfb\u8fdb\u4e8615\u5343\u514b,\u8fd9\u65f6\u6876\u4e2d\u7684\u6cb9\u6b63\u597d\u662f\u4e00\u6876\u6cb9\u7684\u4e00\u534a,\u8fd9\u6876\u6cb9\u91cd\u591a\u5c11\u5343\u514b?
15\u00f7\uff087/10-1/2\uff09\uff1d75\uff08\u5343\u514b\uff09
14.\u4e00\u5217\u706b\u8f66\u4ece\u4e0a\u6d77\u5f00\u5f80\u5929\u6d25,\u884c\u4e86\u5168\u8def\u7a0b\u76843/5,\u5269\u4e0b\u7684\u8def\u7a0b,\u5982\u679c\u6bcf\u5c0f\u65f6\u884c106\u5343\u7c73,5\u5c0f\u65f6\u53ef\u4ee5\u5230\u5929\u6d25.\u4e0a\u6d77\u5230\u5929\u6d25\u7684\u94c1\u8def\u957f\u591a\u5c11\u5343\u7c73?
(106*5)/(1-(3/5))
=530/0.4
=1325(km)
15.\u516d\u5e74\u7ea7\u53c2\u52a0\u6570\u5b66\u5174\u8da3\u5c0f\u7ec4\u7684\u5171\u670946,\u5176\u4e2d\u5973\u751f\u4eba\u6570\u76844/5\u662f\u7537\u751f\u4eba\u6570\u76843/2\u500d,\u53c2\u52a0\u5174\u8da3\u5c0f\u7ec4\u7684\u7537\u3001\u5973\u751f\u5404\u6709\u591a\u5c11\u4eba\uff1f
\u7537\u5973\u751f\u4eba\u6570\u6bd4\u662f\uff1a4/5\uff1a3/2=8\uff1a15
\u7537\u751f\u4eba\u6570\uff1a46/\uff088+15\uff09*8=16\u4eba
\u5973\u751f\u4eba\u657046-16=30\u4eba
16.\u5f20\u7ea2\u6284\u5199\u4e00\u4efd\u7a3f\u4ef6,\u9700\u89815\u5c0f\u65f6\u6284\u5b8c.\u8fd9\u4efd\u7a3f\u4ef6\u5df2\u7531\u522b\u4eba\u6284\u4e861/3,\u5269\u4e0b\u7684\u4ea4\u7ed9\u5f20\u7ea2\u6284,\u8fd8\u8981\u7528\u51e0\u5c0f\u65f6\u624d\u80fd\u6284\u5b8c?
(1-1/3)/(1/5)=10/3
\u8fd8\u89813 1/3\u4e2a\u5c0f\u65f6\u6284\u5b8c
17.\u4e24\u5217\u706b\u8f66\u540c\u65f6\u4ece\u76f8\u8ddd600\u5343\u7c73\u7684\u4e24\u57ce\u76f8\u5bf9\u5f00\u51fa.\u5217\u706b\u8f66\u6bcf\u5c0f\u65f6\u884c60\u5343\u7c73,\u53e6\u4e00\u5217\u706b\u8f66\u6bcf\u5c0f\u65f6\u884c75\u5343\u7c73,\u7ecf\u8fc7\u51e0\u5c0f\u65f6\u4e24\u8f66\u53ef\u4ee5\u76f8\u9047?
600/(60+75)=40/9(\u5c0f\u65f6)
\u7ecf\u8fc740/9\u5c0f\u65f6\u4e24\u8f66\u53ef\u4ee5\u76f8\u9047\u3002
18.\u4e00\u8f86\u6469\u6258\u8f66\u6bcf\u5c0f\u65f6\u884c\u4e8664\u5343\u7c73,\u627e\u8fd9\u6837\u7684\u901f\u5ea6,\u4ece\u7532\u5230\u4e59\u7528\u4e863/4\u5c0f\u65f6,\u7532\u4e59\u4e24\u5730\u76f8\u8ddd\u591a\u5c11\u5343\u7c73?
64\u00d73/4=48\u5343\u7c73
19.\u6c34\u679c\u5e97\u5728\u4e24\u5929\u5185\u5356\u5b8c\u4e00\u6279\u6c34\u679c,\u7b2c\u4e00\u5929\u5356\u51fa\u6c34\u679c\u603b\u91cd\u91cf\u76843/5,\u6bd4\u7b2c\u4e8c\u5929\u591a\u5356\u4e8630\u5343\u514b,\u8fd9\u6279\u6c34\u679c\u5171\u6709\u591a\u5c11\u5343\u514b?
\u7b2c\u4e00\u5929\u5356\u51fa\u6c34\u679c\u603b\u91cd\u91cf\u76843/5\uff0c\u5219\uff0c\u7b2c\u4e8c\u5929\u5356\u4e862/5\uff0c
3/5-2/5=1/5\uff0c\u7b2c\u4e00\u5929\u6bd4\u7b2c\u4e8c\u5929\u591a\u7684\uff0c
30\u00f71/5=150\u5343\u514b\uff0c
\u7b97\u5f0f\u662f\uff0c
1-3/5=2/5
3/5-2/5=1/5
30\u00f71/5=150\u5343\u514b
20.\u897f\u8857\u5c0f\u5b66\u5171\u6709\u5b66\u751f910\u4eba,\u5176\u4e2d\u5973\u751f\u53604/7,\u5973\u751f\u6709\u591a\u5c11\u4eba?\u7537\u751f\u6709\u591a\u5c11\u4eba?
910*4/7=\uff08910*4\uff09/7=520......\u5973\u751f
910-520=390.......\u7537\u751f
21.\u4e00\u5757\u957f\u65b9\u5f62\u5730,\u957f60\u7c73,\u5bbd\u662f\u957f\u76842/5,\u8fd9\u5757\u5730\u7684\u9762\u79ef\u662f\u591a\u5c11\u5e73\u65b9\u7c73?
4/5*5/8=\uff084*5\uff09/\uff085*8\uff09=1/2\uff08\u7c73)
4/5-1/2=8/10-5/10=3/10(\u7c73\uff09
22.\u91d1\u9c7c\u6c60\u91cc\u7ea2\u91d1\u9c7c\u4e0e\u9ed1\u91d1\u9c7c\u6761\u6570\u7684\u6bd4\u662f7:3,\u9ed1\u91d1\u9c7c\u67099\u6761,\u7ea2\u91d1\u9c7c\u6709\u591a\u5c11\u6761?
9\u00f73\u00d77\uff1d21\u6761
23.6\u5e74\u7ea7\u6709\u5b66\u751f132\u4eba,\u5176\u4e2d\u7537\u5b66\u751f\u4e0e\u5973\u5b66\u751f\u4eba\u6570\u7684\u6bd4\u662f6:5,6\u5e74\u7ea7\u7537.\u5973\u5b66\u751f\u5404\u6709\u591a\u5c11\u4eba?
132\u00f7\uff086\uff0b5\uff09\uff1d12\u4eba
\u7537\u540c\u5b66\u6709
12\u00d76\uff1d72\u4eba
\u5973\u540c\u5b66\u6709
12\u00d75\uff1d60\u4eba
24.\u7532\u6570\u548c\u4e59\u6570\u7684\u6bd4\u662f2:3,\u4e59\u6570\u548c\u4e19\u6570\u7684\u6bd4\u662f4:5.\u6c42\u7532\u6570\u548c\u4e19\u6570\u7684\u6bd4.
\u7532\uff1a\u4e59\uff1d2\uff1a3\uff1d8\uff1a12
\u4e59\uff1a\u4e19\uff1d4\uff1a5\uff1d12\uff1a15
\u7532\uff1a\u4e59\uff1a\u4e19\uff1d8\uff1a12\uff1a15
\u7532\uff1a\u4e19\uff1d8\uff1a15
25.\u89e3\u653e\u8def\u5c0f\u5b66\u4eca\u5e74\u690d\u6811\u7684\u68f5\u6570\u662f\u53bb\u5e74\u76841.2\u500d.\u5199\u51fa\u8fd9\u4e2a\u5c0f\u5b66\u4eca\u5e74\u690d\u6811\u68f5\u6570\u548c\u53bb\u5e74\u690d\u6811\u68f5\u6570\u7684\u6bd4.\u5316\u7b80.
1.2\uff1a1\uff1d6\uff1a5
26.\u4e00\u4e2a\u7535\u89c6\u673a\u5382\u53bb\u5e74\u5f69\u8272\u7535\u89c6\u673a\u7684\u4ea7\u91cf\u4e0e\u7535\u89c6\u673a\u603b\u4ea7\u91cf\u7684\u6bd4\u662f20\u5206\u4e4b9.\u53bb\u5e74\u5171\u751f\u4ea7\u7535\u89c6\u673a250000\u592a,\u5176\u4e2d\u5f69\u8272\u7535\u89c6\u673a\u6709\u591a\u5c11\u53f0?
250000\u00d720\u5206\u4e4b9\uff1d112500\u53f0
27.\u67d0\u5de5\u5382\u5de5\u4eba\u5360\u5168\u5382\u804c\u5de5\u603b\u6570\u76843\u5206\u4e4b2,\u6280\u672f\u4eba\u5458\u5360\u5168\u573a\u804c\u5de5\u603b\u6570\u76849\u5206\u4e4b2,\u5176\u4f59\u7684\u662f\u5e72\u90e8.\u5199\u51fa\u8fd9\u4e2a\u5382\u7684\u5de5\u4eba,\u6280\u672f\u4eba\u5458\u548c\u5e72\u90e8\u4eba\u6570\u7684\u6bd4.
\u5e72\u90e8\u5360\u5168\u5382\u804c\u5de5\u603b\u6570\u7684
1\uff0d3\u5206\u4e4b2\uff0d9\u5206\u4e4b2\uff1d9\u5206\u4e4b1
\u8fd9\u4e2a\u5382\u7684\u5de5\u4eba,\u6280\u672f\u4eba\u5458\u548c\u5e72\u90e8\u4eba\u6570\u7684\u6bd4\u662f
3\u5206\u4e4b2\uff1a9\u5206\u4e4b2\uff1a9\u5206\u4e4b1\uff1d6\uff1a2\uff1a1
28.\u67d0\u73ed\u5b66\u751f\u4eba\u6570\u572840\u523050\u4eba\u4e4b\u95f4,\u7537\u751f\u4eba\u6570\u548c\u5973\u751f\u4eba\u6570\u7684\u6bd4\u662f5:6.
\u8fd9\u4e2a\u73ed\u7684\u7537\u751f\u548c\u5973\u751f\u5404\u6709\u591a\u5c11\u4eba..
\u56e0\u4e3a\u4eba\u6570\u4e3a\u6574\u6570\uff0c
\u6240\u4ee5\u73ed\u7ea7\u4eba\u6570\u80fd\u88ab5\uff0b6\uff1d11\u6574\u9664
\u6240\u4ee5\u73ed\u7ea7\u4eba\u6570\u4e3a44\u4eba
\u7537\u751f\u6709
44\u00f7\uff085\uff0b6\uff09\u00d75\uff1d20\u4eba
\u5973\u751f\u6709
44\uff0d20\uff1d24\u4eba
29.\u56fe\u4e66\u9986\u79d1\u6280\u4e66\u4e0e\u6587\u827a\u4e66\u7684\u6bd4\u662f4 \uff1a5\uff0c\u53c8\u8d2d\u8fdb300\u672c\u6587\u827a\u672f\u540e\uff0c\u79d1\u6280\u4e66\u4e0e\u6587\u827a\u4e66\u7684\u6bd4\u662f5 \uff1a7\uff0c\u6587\u827a\u4e66\u6bd4\u539f\u6765\u589e\u52a0\u4e86\u767e\u5206\u4e4b\u51e0\uff1f
\u6587\u827a\u4e66\u539f\u6709\uff1a300\u00f7\uff087/12-5/9\uff09=10800\uff08\u672c\uff09
\u6587\u827a\u4e66\u6bd4\u539f\u6765\u589e\u52a0\u4e86\uff1a300\u00f710800\u22482.8%
30.100\u514b\u7cd6\u6c34\u6b63\u597d\u88c5\u6ee1\u4e86\u4e00\u4e2a\u73bb\u7483\u676f,\u5176\u4e2d\u542b\u7cd610\u514b.\u4ece\u676f\u4e2d\u5012\u51fa10\u514b\u7cd6\u6c34\u540e,\u518d\u5f80\u676f\u4e2d\u52a0\u6ee1\u6c34,\u8fd9\u662f\u88ab\u5b50\u91cc\u7cd6\u4e0e\u6c34\u7684\u6bd4\u662f\u591a\u5c11?
\u539f\u6765\u91cc\u9762\u6c34\u662f90\uff0c\u7cd6\u662f10
\u5012\u51fa10\u514b\uff0c\u90a3\u91cc\u9762\u8fd8\u526990\uff0c\u5176\u4e2d\u6c3481\uff0c\u7cd69
\u518d\u52a0\u6ee1\u6c34\u53c8\u6c34\u4e3a91\uff0c\u7cd6\u8fd8\u662f9
\u90a3\u5c31\u662f9/91
31.\u4e94\u3001\u516d\u5e74\u7ea7\u53ea\u6709\u5b66\u751f175\u4eba\u3002\u5206\u6210\u4e09\u7ec4\u53c2\u52a0\u6d3b\u52a8\u3002\u4e00\u3001\u4e8c\u4e24\u7ec4\u7684\u4eba\u6570\u6bd4\u662f5\uff1a4\uff0c\u7b2c\u4e09\u7ec4\u670967\u4eba\uff0c\u7b2c\u4e00\u3001\u4e8c\u4e24\u7ec4\u5404\u6709\u591a\u5c11\u4eba\uff1f
\uff081\uff09\u4e00\u3001\u4e8c\u7ec4\u5171\u6709\u5b66\u751f175\u4eba-67\u4eba=108\u4eba
\uff082\uff09\u4e00\u7ec4\u5b66\u751f\u6709108\u4eba\u00d75/9=60\u4eba
\uff083\uff09\u4e8c\u7ec4\u5b66\u751f\u6709108\u4eba\u00d74/9=48\u4eba
32.\u67d0\u6821\u6709\u5b66\u751f465\u4eba\uff0c\u5176\u4e2d\u5973\u751f\u76842/3\u6bd4\u7537\u751f\u76844/5\u5c1120\u4eba\u3002\u7537\u00b7\u5973\u5404\u4e2a\u591a\u5c11?
\u5973\u751f\u76843\u5206\u4e4b2\u6bd4\u7537\u751f\u76845\u5206\u4e4b4\u5c1120\u4eba
\u5973\u751f\u6bd4\u7537\u751f\u7684(4/5)/(2/3)=6/5\u5c1120/(2/3)=30\u4eba
\u7537\u751f\u6709
(465+30)/(1+6/5)=225(\u4eba)
\u5973\u751f\u6709
465-225=240(\u4eba)
33.\u4e00\u4efd\u7a3f\u4ef6,\u7b2c\u4e00\u5929\u6253\u4e86\u5168\u7bc7\u7a3f\u76847\u5206\u4e4b1\u7b2c\u4e8c\u5929\u6253\u4e865\u5206\u4e4b2\u7b2c\u4e8c\u5929\u6bd4\u7b2c\u4e00\u5929\u591a\u6253\u4e869\u9875,\u8fd9\u7bc7\u7a3f\u4ef6\u6709\u591a\u5c11\u9875?
9\u9664\u4ee5\uff085\u5206\u4e4b2-7\u5206\u4e4b1\uff09
=9\u9664\u4ee535\u5206\u4e4b9
=35\uff08\u9875\uff09
\u7b54\uff1a\u8fd9\u89c1\u7a3f\u4ef6\u670935\u9875\u3002
34.\u4e00\u5757\u5730\uff0c\u957f\u548c\u5bbd\u7684\u6bd4\u662f8\uff1a5\uff0c\u957f\u6bd4\u5bbd\u591a24\u7c73\u3002\u8fd9\u5757\u5730\u6709\u591a\u5c11\u5e73\u65b9\u7c73\uff1f
\u8bbe\u957f\u662f8\u4efd\uff0c\u5219\u5bbd\u662f5\u4efd\uff0c\u591a\u4e86\uff1a3\u4efd\uff0c\u5373\u662f24\u7c73
\u90a3\u4e48\u4e00\u4efd\u662f\uff1a24/3=8\u7c73
\u5373\u957f\u662f\uff1a8*8=64\u7c73\uff0c\u5bbd\u662f\uff1a8*5=40\u7c73
\u9762\u79ef\u662f\uff1a64*40=2560\u5e73\u65b9\u7c73
35.\u5982\u679c\u7537\u540c\u5b66\u7684\u4eba\u6570\u6bd4\u5973\u540c\u5b66\u591a25%\u90a3\u4e48\u5973\u540c\u5b66\u7684\u4eba\u6570\u6bd4\u7537\u540c\u5b66\u5c11\u591a\u5c11\uff1f
\u5973\u540c\u5b66\u4e3a\u5355\u4f4d1
\u7537\u540c\u5b66\u4e3a1\uff0b25\uff05\uff1d125\uff05
\u5973\u540c\u5b66\u7684\u4eba\u6570\u6bd4\u7537\u540c\u5b66\u5c11\uff08125\uff05\uff0d1\uff09\u00f7125\uff05\uff1d20\uff05
36.\u9972\u517b\u5382\u4eca\u5e74\u517b\u732a1987\u5934,\u6bd4\u53bb\u5e74\u517b\u732a\u5934\u6570\u76843\u500d\u5c11245\u5934,\u4eca\u5e74\u6bd4\u53bb\u5e74\u591a\u517b\u732a\u591a\u5c11\u5934?
\u53bb\u5e74\u517b\u732a\uff1a(1987+245)/3=744
\u4eca\u5e74\u6bd4\u53bb\u5e74\u591a\u517b\u732a:1987-744=1243
37.\u5c0f\u4f1f\u548c\u5c0f\u82f1\u7ed9\u5e0c\u671b\u5de5\u7a0b\u6350\u6b3e\u94b1\u6570\u7684\u6bd4\u662f2:5.\u5c0f\u82f1\u6350\u4e8635\u5143,\u5c0f\u4f1f\u6350\u4e86\u591a\u5c11\u94b1?
\u8bbe\u5c0f\u4f1f\u6350\u4e86X\u5143
\u6240\u4ee5 2:5=X:35 \u5f97:X=14\u5143 \u5c0f\u4f1f\u6350\u4e8614\u5143
38.\u4e09\u4e2a\u5e73\u5747\u6570\u4e3a8.4\uff0c\u5176\u4e2d\u7b2c\u4e00\u4e2a\u6570\u662f9.2\uff0c\u7b2c\u4e8c\u4e2a\u6570\u6bd4\u7b2c\u4e09\u4e2a\u6570\u5c110.8\uff0c\u7b2c\u4e09\u4e2a\u6570\u662f\u4ec0\u4e48
\u7b2c3\u4e2a\u6570\u662f8.4
\u89e3:\u8bbe\u7b2c3\u4e2a\u6570\u4e3ax,\u5217\u65b9\u7a0b\u4e3a:
3*[9.2+(x-0.8)+x]=8.4
\u89e3\u5f97 x=8.4
39.\u6709\u4e24\u6839\u7ef3\u5b50\uff0c\u7b2c\u4e00\u6839\u7ef3\u5b50\u7684\u957f\u5ea6\u662f\u7b2c\u4e8c\u6839\u76841.5\u500d\uff0c\u7b2c\u4e8c\u6839\u6bd4\u7b2c\u4e00\u6839\u77ed3\u7c73\uff0c\u4e24\u6839\u7ef3\u5b50\u5404\u957f\u591a\u5c11\u7c73\uff1f
\u8bbe\u7b2c\u4e8c\u6839\u957fx\u7c73\uff0c\u5219\u7b2c\u4e8c\u6839\u957f1.5x\u7c73
1.5x-x\uff1d3
0.5x\uff1d3
x\uff1d6
6\u00d71.5\uff1d9\uff08\u7c73\uff09
\u7b2c\u4e00\u6839\u957f6\u7c73
\u7b2c\u4e8c\u6839\u957f9\u7c73
40.\u5de5\u7a0b\u961f\u4fee\u4e00\u6761\u8def\uff0c\u5df2\u4fee\u597d\u7684\u957f\u5ea6\u4e0e\u5269\u4e0b\u7684\u6bd4\u662f4\uff1a5\uff0c\u82e5\u518d\u4fee25\u7c73\u5c31\u6070\u597d\u4fee\u5230\u4e86\u8fd9\u6761\u8def\u7684\u4e2d\u70b9\uff0c\u8fd9\u6761\u8def\u5168\u957f\u591a\u5c11\u7c73\uff1f
4+5=9
\u89e3\uff1a\u8bbe\u8fd9\u6761\u8def\u5168\u957fx\u7c73\uff1a
(5/9-4/9)x=25
1/9x=25
x=225
\u8fd9\u6761\u8def\u5168\u957f225\u7c73
\u56de\u7b54\u8005\uff1a lealun - \u4e8c\u7ea7 2010-7-14 07:36
\u7b54\u590d \u5171 1 \u6761
\u68c0\u4e3e \uff08\u5206\u914d\u8c03\u8fd0\u95ee\u9898\uff09\u67d0\u6821\u5e08\u751f\u5230\u7532\u3001\u4e59\u4e24\u4e2a\u5de5\u5382\u53c2\u52a0\u52b3\u52a8\uff0c\u5982\u679c\u4ece\u7532\u5382\u62bd9\u4eba\u5230\u4e59\u5382\uff0c\u5219\u4e24\u5382\u7684\u4eba\u6570\u76f8\u540c\uff1b\u5982\u679c\u4ece\u4e59\u5382\u62bd5\u4eba\u5230\u7532\u5382\uff0c\u5219\u7532\u5382\u7684\u4eba\u6570\u662f\u4e59\u5382\u76842\u500d\uff0c\u5230\u4e24\u4e2a\u5de5\u5382\u7684\u4eba\u6570\u5404\u662f\u591a\u5c11\uff1f
\u89e3\uff1a\u8bbe\u5230\u7532\u5de5\u5382\u7684\u4eba\u6570\u4e3ax\u4eba\uff0c\u5230\u4e59\u5de5\u5382\u7684\u4eba\u6570\u4e3ay\u4eba
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a1\u3001\u62bd9\u4eba\u540e\u5230\u7532\u5de5\u5382\u7684\u4eba\u6570=\u5230\u4e59\u5de5\u5382\u7684\u4eba\u6570
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1ax-9=
2\u3001\u62bd5\u4eba\u540e\u5230\u7532\u5de5\u5382\u7684\u4eba\u6570=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
\uff08\u91d1\u878d\u5206\u914d\u95ee\u9898\uff09\u5c0f\u534e\u4e70\u4e8610\u5206\u4e0e20\u5206\u7684\u90ae\u7968\u517116\u679a\uff0c\u82b1\u4e862\u51435\u89d2\uff0c\u95ee10\u5206\u4e0e20\u5206\u7684\u90ae\u7968\u5404\u4e70\u4e86\u591a\u5c0f\uff1f \u89e3\uff1b\u8bbe\u5171\u4e70x\u679a10\u5206\u90ae\u7968\uff0cy\u679a20\u5206\u90ae\u7968
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a
1\u300110\u5206\u90ae\u7968\u7684\u679a\u6570+20\u5206\u90ae\u7968\u7684\u679a\u6570=\u603b\u679a\u6570
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u300110\u5206\u90ae\u7968\u7684\u603b\u4ef7+ =\u5168\u90e8\u90ae\u7968\u7684\u603b\u4ef7
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a10X+ =
\uff08\u505a\u5de5\u5206\u914d\u95ee\u9898\uff09\u5c0f\u5170\u5728\u73a9\u5177\u5de5\u5382\u52b3\u52a8\uff0c\u505a4\u4e2a\u5c0f\u72d7\u30017\u4e2a\u5c0f\u6c7d\u8f66\u7528\u53bb3\u5c0f\u65f642\u5206\uff0c\u505a5\u4e2a\u5c0f\u72d7\u30016\u4e2a\u5c0f\u6c7d\u8f66\u7528\u53bb3\u5c0f\u65f637\u5206\uff0c\u5e73\u5747\u505a1\u4e2a\u5c0f\u72d7\u30011\u4e2a\u5c0f\u6c7d\u8f66\u5404\u7528\u591a\u5c11\u65f6\u95f4\uff1f
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a
1\u3001\u505a4\u4e2a\u5c0f\u72d7\u7684\u65f6\u95f4+ =3\u65f642\u5206
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001 +\u505a6\u4e2a\u5c0f\u6c7d\u8f66\u7684\u65f6\u95f4=3\u65f637\u5206
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
\uff08\u884c\u7a0b\u95ee\u9898\uff09\u7532\u3001\u4e59\u4e8c\u4eba\u76f8\u8ddd6km\uff0c\u4e8c\u4eba\u540c\u5411\u800c\u884c\uff0c\u75323\u5c0f\u65f6\u53ef\u8ffd\u4e0a\u4e59\uff1b\u76f8\u5411\u800c\u884c\uff0c1\u5c0f\u65f6\u76f8\u9047\u3002\u4e8c\u4eba\u7684\u5e73\u5747\u901f\u5ea6\u5404\u662f\u591a\u5c11\uff1f \u89e3\uff1a\u8bbe\u7532\u6bcf\u5c0f\u65f6\u8d70x\u5343\u7c73\uff0c\u4e59\u6bcf\u5c0f\u65f6\u8d70y\u5343\u7c73
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a
1\u3001\u540c\u5411\u800c\u884c\uff1a\u7532\u7684\u8def\u7a0b=\u4e59\u7684\u8def\u7a0b+
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u76f8\u5411\u800c\u884c\uff1a\u7532\u7684\u8def\u7a0b+ =
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
\uff08\u500d\u6570\u95ee\u9898\uff09\u67d0\u5e02\u73b0\u670942\u4e07\u4eba\u53e3\uff0c\u8ba1\u5212\u4e00\u5e74\u540e\u57ce\u9547\u4eba\u53e3\u589e\u52a00.8\uff05\uff0c\u519c\u6751\u4eba\u53e3\u589e\u52a0\u5de5\u53821.1\uff05,\u8fd9\u6837\u5168\u5e02\u4eba\u53e3\u5c06\u589e\u52a01\uff05\uff0c\u6c42\u8fd9\u4e2a\u5e02\u73b0\u5728\u7684\u57ce\u9547\u4eba\u53e3\u4e0e\u519c\u6751\u4eba\u53e3\uff1f
\u89e3\uff1a\u8fd9\u4e2a\u5e02\u73b0\u5728\u7684\u57ce\u9547\u4eba\u53e3\u6709x\u4e07\u4eba\uff0c\u519c\u6751\u4eba\u53e3\u6709y\u4e07\u4eba
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a
1\u3001\u73b0\u5728\u57ce\u9547\u4eba\u53e3+ =\u73b0\u5728\u5168\u5e02\u603b\u4eba\u53e3
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u660e\u5e74\u589e\u52a0\u540e\u7684\u57ce\u9547\u4eba\u53e3+ =\u660e\u5e74\u5168\u5e02\u603b\u4eba\u53e3
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a\uff081+0.8\uff05\uff09x+ =
\uff08\u5206\u914d\u95ee\u9898\uff09\u67d0\u5e7c\u513f\u56ed\u5206\u840d\u679c\uff0c\u82e5\u6bcf\u4eba3\u4e2a\uff0c\u5219\u52692\u4e2a\uff0c\u82e5\u6bcf\u4eba4\u4e2a\uff0c\u5219\u6709\u4e00\u4e2a\u5c111\u4e2a\uff0c\u95ee\u5e7c\u513f\u56ed\u6709\u51e0\u4e2a\u5c0f\u670b\u53cb\uff1f \u89e3\uff1a\u8bbe\u5e7c\u513f\u56ed\u6709x\u4e2a\u5c0f\u670b\u53cb\uff0c\u840d\u679c\u6709y\u4e2a
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a1\u3001\u840d\u679c\u603b\u6570=\u6bcf\u4eba\u52063\u4e2a+
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u840d\u679c\u603b\u6570=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
\uff08\u6d53\u5ea6\u5206\u914d\u95ee\u9898\uff09\u8981\u914d\u6d53\u5ea6\u662f45%\u7684\u76d0\u6c3412\u5343\u514b\uff0c\u73b0\u670910%\u7684\u76d0\u6c34\u4e0e85%\u7684\u76d0\u6c34\uff0c\u8fd9\u4e24\u79cd\u76d0\u6c34\u5404\u9700\u591a\u5c11\uff1f
\u89e3\uff1a\u8bbe\u542b\u76d010%\u7684\u76d0\u6c34\u6709x\u5343\u514b\uff0c\u542b\u76d085%\u7684\u76d0\u6c34\u6709y\u5343\u514b\u3002 \u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb \uff1a
1\u3001\u542b\u76d010%\u7684\u76d0\u6c34\u4e2d\u76d0\u7684\u91cd\u91cf+\u542b\u76d085%\u7684\u76d0\u6c34\u4e2d\u76d0\u7684\u91cd\u91cf=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a10%x+ =
2\u3001\u542b\u76d010%\u7684\u76d0\u6c34\u91cd\u91cf+\u542b\u76d085%\u7684\u76d0\u6c34\u91cd\u91cf=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1ax+y=
\uff08\u91d1\u878d\u5206\u914d\u95ee\u9898\uff09\u9700\u8981\u7528\u591a\u5c11\u6bcf\u5343\u514b\u552e4.2\u5143\u7684\u7cd6\u679c\u624d\u80fd\u4e0e\u6bcf\u5343\u514b\u552e3.4\u5143\u7684\u7cd6\u679c\u6df7\u5408\u6210\u6bcf\u5343\u514b\u552e3.6\u5143\u7684\u6742\u62cc\u7cd6200\u5343\u514b\uff1f\u89e3\uff1a\u8bbe\u6bcf\u5343\u514b\u552e4.2\u5143\u7684\u7cd6\u679c\u4e3ax\u5343\u514b\uff0c\u6bcf\u5343\u514b\u552e3.4\u5143\u7684\u7cd6\u679c\u4e3ay\u5343\u514b
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb \uff1a
1\u3001\u6bcf\u5343\u514b\u552e4.2\u5143\u7684\u7cd6\u679c\u9500\u552e\u603b\u4ef7+ =
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u6bcf\u5343\u514b\u552e4.2\u5143\u7684\u7cd6\u679c\u91cd\u91cf+ =
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
\uff08\u51e0\u4f55\u5206\u914d\u95ee\u9898\uff09\u5982\u56fe\uff1a\u75288\u5757\u76f8\u540c\u7684\u957f\u65b9\u5f62\u62fc\u6210\u4e00\u4e2a\u5bbd\u4e3a48\u5398\u7c73\u7684\u5927\u957f\u65b9\u5f62\uff0c\u6bcf\u5757\u5c0f\u957f\u65b9\u5f62\u7684\u957f\u548c\u5bbd\u5206\u522b\u662f\u591a\u5c11\uff1f \u89e3\uff1a\u8bbe\u5c0f\u957f\u65b9\u5f62\u7684\u957f\u662fx\u5398\u7c73\uff0c\u5bbd\u662fy\u5398\u7c73
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb \uff1a
1\u3001\u5c0f\u957f\u65b9\u5f62\u7684\u957f+ =\u5927\u957f\u65b9\u5f62\u7684\u5bbd
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u5c0f\u957f\u65b9\u5f62\u7684\u957f=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
\uff08\u6750\u6599\u5206\u914d\u95ee\u9898\uff09\u4e00\u5f20\u684c\u5b50\u7531\u684c\u9762\u548c\u56db\u6761\u811a\u7ec4\u6210\uff0c1\u7acb\u65b9\u7c73\u7684\u6728\u6750\u53ef\u5236\u6210\u684c\u976250\u5f20\u6216\u5236\u4f5c\u684c\u811a300\u6761\uff0c\u73b0\u67095\u7acb\u65b9\u7c73\u7684\u6728\u6750\uff0c\u95ee\u5e94\u5982\u4f55\u5206\u914d\u6728\u6750\uff0c\u53ef\u4ee5\u4f7f\u684c\u9762\u548c\u684c\u811a\u914d\u5957\uff1f
\u89e3\uff1a\u8bbe\u6709
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb \uff1a1\u3001\u5236\u4f5c\u684c\u9762\u7684\u6728\u6750+ =
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u6240\u6709\u684c\u9762\u7684\u603b\u6570\uff1a\u6240\u6709\u684c\u811a\u7684\u603b\u6570=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
\uff08\u548c\u5dee\u500d\u95ee\u9898\uff09\u4e00\u4e2a\u4e24\u4f4d\u6570\uff0c\u5341\u4f4d\u4e0a\u7684\u6570\u5b57\u6bd4\u4e2a\u4f4d\u4e0a\u7684\u6570\u5b57\u59275\uff0c\u5982\u679c\u628a\u5341\u4f4d\u4e0a\u7684\u6570\u5b57\u4e0e\u4e2a\u4f4d\u4e0a\u7684\u6570\u5b57\u4ea4\u6362\u4f4d\u7f6e\uff0c\u90a3\u4e48\u5f97\u5230\u7684\u65b0\u4e24\u4f4d\u6570\u6bd4\u539f\u6765\u7684\u4e24\u4f4d\u6570\u7684\u4e00\u534a\u8fd8\u5c119\uff0c\u6c42\u8fd9\u4e2a\u4e24\u4f4d\u6570\uff1f
\u89e3\uff1a\u8bbe\u4e2a\u4f4d\u6570\u5b57\u4e3ax\uff0c\u5341\u4f4d\u6570\u5b57\u4e3ay\u3002 \u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a
1\u3001\u4e2a\u4f4d\u6570\u5b57= -5
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u65b0\u4e24\u4f4d\u6570=
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
\uff08\u5206\u914d\u8c03\u8fd0\uff09\u4e00\u6279\u8d27\u7269\u8981\u8fd0\u5f80\u67d0\u5730\uff0c\u8d27\u4e3b\u51c6\u5907\u79df\u7528\u6c7d\u8fd0\u516c\u53f8\u7684\u7532\u3001\u4e59\u4e24\u79cd\u8d27\u8f66\uff0c\u5df2\u77e5\u8fc7\u53bb\u79df\u7528\u8fd9\u4e24\u79cd\u6c7d\u8f66\u8fd0\u8d27\u7684\u60c5\u51b5\u5982\u5de6\u8868\u6240\u793a\uff0c\u73b0\u79df\u7528\u8be5\u516c\u53f85\u8f86\u7532\u79cd\u8d27\u8f66\u548c6\u8f86\u4e59\u79cd\u8d27\u8f66\uff0c\u4e00\u6b21\u521a\u597d\u8fd0\u5b8c\u8fd9\u6279\u8d27\u7269\uff0c\u95ee\u8fd9\u6279\u8d27\u7269\u6709\u591a\u5c11\u5428\uff1f
\u89e3\uff1a\u8bbe
\u9898\u4e2d\u7684\u4e24\u4e2a\u76f8\u7b49\u5173\u7cfb\uff1a
1\u3001\u7b2c\u4e00\u6b21\uff1a\u7532\u8d27\u8f66\u8fd0\u7684\u8d27\u7269\u91cd\u91cf+ =36
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
2\u3001\u7b2c\u4e8c\u6b21\uff1a\u7532\u8d27\u8f66\u8fd0\u7684\u8d27\u7269\u91cd\u91cf+ =26
\u53ef\u5217\u65b9\u7a0b\u4e3a\uff1a
\u518d\u63a2\u5b9e\u9645\u95ee\u9898\u4e0e\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\u5e94\u7528\u9898\u68c0\u6d4b
\u25c6\u77e5\u80fd\u70b9\u5206\u7c7b\u8bad\u7ec3
\u77e5\u80fd\u70b91
1\u3001\u73ed\u4e0a\u6709\u7537\u5973\u540c\u5b6632\u4eba\uff0c\u5973\u751f\u4eba\u6570\u7684\u4e00\u534a\u6bd4\u7537\u751f\u603b\u6570\u5c1110\u4eba\uff0c\u82e5\u8bbe\u7537\u751f\u4eba\u6570\u4e3ax\u4eba\uff0c\u5973\u751f\u4eba\u6570\u4e3ay\u4eba\uff0c\u5219\u53ef\u5217\u65b9\u7a0b\u7ec4\u4e3a
2\u3001\u7532\u4e59\u4e24\u6570\u7684\u548c\u4e3a10\uff0c\u5176\u5dee\u4e3a2\uff0c\u82e5\u8bbe\u7532\u6570\u4e3ax\uff0c\u4e59\u6570\u4e3ay\uff0c\u5219\u53ef\u5217\u65b9\u7a0b\u7ec4\u4e3a
3\u3001\u5df2\u77e5\u65b9\u7a0by=kx+b\u7684\u4e24\u7ec4\u89e3\u662f \u5219k= b=
4\u67d0\u5de5\u5382\u73b0\u5728\u5e74\u4ea7\u503c\u662f150\u4e07\u5143\uff0c\u5982\u679c\u6bcf\u589e\u52a01000\u5143\u7684\u6295\u8d44\u4e00\u5e74\u53ef\u589e\u52a02500\u5143\u7684\u4ea7\u503c\uff0c\u8bbe\u65b0\u589e\u52a0\u7684\u6295\u8d44\u989d\u4e3ax\u4e07\u5143\uff0c\u603b\u4ea7\u503c\u4e3ay\u4e07\u5143\uff0c\u90a3\u4e48x,y\u6240\u6ee1\u8db3\u7684\u65b9\u7a0b\u4e3a
5\u3001\u5b66\u6821\u8d2d\u4e7035\u5f20\u7535\u5f71\u7968\u5171\u7528250\u5143\uff0c\u5176\u4e2d\u7532\u79cd\u7968\u6bcf\u5f208\u5143\uff0c\u4e59\u79cd\u7968\u6bcf\u5f206\u5143\uff0c\u8bbe\u7532\u79cd\u7968x\u5f20\uff0c\u4e59\u79cd\u7968y\u5f20\uff0c\u5219\u5217\u65b9\u7a0b\u7ec4 \uff0c\u65b9\u7a0b\u7ec4\u7684\u89e3\u662f
6\u3001\u4e00\u6839\u6728\u68d2\u957f8\u7c73\uff0c\u5206\u6210\u4e24\u6bb5\uff0c\u5176\u4e2d\u4e00\u6bb5\u6bd4\u53e6\u4e00\u6bb5\u957f1\u7c73\uff0c\u6c42\u8fd9\u4e24\u6bb5\u7684\u957f\u65f6\uff0c\u8bbe\u5176\u4e2d\u4e00\u6bb5\u4e3ax\u7c73\uff0c\u53e6\u4e00\u6bb5\u4e3ay\uff0c\u90a3\u4e48\u5217\u7684\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\u4e3a
7\u3001\u4e00\u4e2a\u77e9\u5f62\u5468\u957f\u4e3a20cm\uff0c\u4e14\u957f\u6bd4\u5bbd\u59272cm\uff0c\u5219\u77e9\u5f62\u7684\u957f\u4e3a cm\uff0c\u5bbd\u4e3a cm
8\u3001\u67d0\u6821\u8fd0\u52a8\u5458\u5206\u7ec4\u8bad\u7ec3\uff0c\u82e5\u6bcf\u7ec47\u4eba\uff0c\u4f593\u4eba\uff1b\u82e5\u6bcf\u7ec48\u4eba\uff0c\u5219\u7f3a5\u4eba\uff1b\u8bbe\u8fd0\u52a8\u5458\u4eba\u6570\u4e3ax\u4eba\uff0c\u7ec4\u6570\u4e3ay\u7ec4\uff0c\u5219\u5217\u65b9\u7a0b\u7ec4\u4e3a \uff08 \uff09
9\u3001\u4e00\u53ea\u8f6e\u8239\u987a\u6c34\u901f\u5ea6\u4e3a40\u5343\u7c73/\u65f6,\u9006\u6c34\u901f\u5ea6\u4e3a26\u5343\u7c73/\u65f6,\u5219\u8239\u5728\u9759\u6c34\u7684\u901f\u5ea6\u662f
_______ ,\u6c34\u6d41\u901f\u5ea6\u662f ____.
10\u3001\u4e00\u8f86\u6c7d\u8f66\u4eceA\u5730\u51fa\u53d1,\u5411\u4e1c\u884c\u9a76,\u9014\u4e2d\u8981\u8fc7\u4e00\u5ea7\u6865,\u4f7f\u7528\u76f8\u540c\u7684\u65f6\u95f4,\u5982\u679c\u8f66\u901f\u662f\u6bcf\u5c0f\u65f660\u5343\u7c73,\u5c31\u80fd\u8d8a\u8fc7\u68652\u5343\u7c73;\u5982\u679c\u8f66\u901f\u662f\u6bcf\u5c0f\u65f650\u5343\u7c73,\u5c31\u5dee3\u5343\u7c73\u624d\u80fd\u5230\u6865,\u5219A\u5730\u4e0e\u6865\u76f8\u8ddd _____\u5343\u7c73,\u7528\u4e86 \u5c0f\u65f6.(\u8003\u8651\u95ee\u9898\u65f6,\u6865\u89c6\u4e3a\u4e00\u70b9)
11\u3001\u4e00\u5757\u77e9\u5f62\u8349\u576a\u7684\u957f\u6bd4\u5bbd\u76842\u500d\u591a10m\uff0c\u5b83\u7684\u5468\u957f\u662f132m\uff0c\u5219\u5bbd\u548c\u957f\u5206\u522b\u4e3a_____\uff0e
12\u3001\u4e00\u6279\u4e66\u5206\u7ed9\u4e00\u7ec4\u5b66\u751f\uff0c\u6bcf\u4eba6\u672c\u5219\u5c116\u672c\uff0c\u6bcf\u4eba5\u672c\u5219\u591a5\u672c\uff0c\u8be5\u7ec4\u5171\u6709_____\u540d\u5b66\u751f\uff0c\u8fd9\u6279\u4e66\u5171\u6709_______\u672c\uff0e
13\u3001\u67d0\u5e74\u7ea7\u6709\u5b66\u751f246\u4eba\uff0c\u5176\u4e2d\u7537\u751f\u6bd4\u5973\u751f\u4eba\u6570\u76842\u500d\u5c113\u4eba\uff0c\u6c42\u7537\u3001\u5973\u751f\u5404\u6709\u591a\u5c11\u4eba\uff0e\u8bbe\u5973\u751f\u4eba\u6570\u4e3ax\u4eba\uff0c\u7537\u751f\u4eba\u6570\u4e3ay\uff0c\u5219\u53ef\u5217\u51fa\u65b9\u7a0b\u7ec4___ ____\uff0e
14\u3001\u7532\u3001\u4e59\u4e24\u6761\u7ef3\u5171\u957f17m\uff0c\u5982\u679c\u7532\u7ef3\u51cf\u53bb \uff0c\u4e59\u7ef3\u589e\u52a01m\uff0c\u4e24\u6761\u7ef3\u957f\u76f8\u7b49\uff0c\u6c42\u7532\u3001\u4e59\u4e24\u6761\u7ef3\u5404\u957f\u591a\u5c11\u7c73\uff0e\u82e5\u8bbe\u7532\u7ef3\u957fx\uff08m\uff09\uff0c\u4e59\u7ef3\u957fy\uff08m\uff09\uff0c\u5219\u53ef\u5217\u65b9\u7a0b\u7ec4\uff08 \uff09\uff0e
15\u3001\u5df2\u77e5\u957f\u6c5f\u6bd4\u9ec4\u6cb3\u957f836km\uff0c\u9ec4\u6cb3\u957f\u5ea6\u76846\u500d\u6bd4\u957f\u6c5f\u957f\u5ea6\u76845\u500d\u591a1 284km\uff0e\u8bbe\u957f\u6c5f\u3001\u9ec4\u6cb3\u7684\u957f\u5ea6\u5206\u522b\u4e3ax\uff08km\uff09\uff0cy\uff08km\uff09\uff0c\u5219\u53ef\u5217\u51fa\u65b9\u7a0b\u7ec4 \uff0e
16\u3001\u73ed\u4e0a\u6709\u7537\u5973\u540c\u5b6632\u4eba\uff0c\u5973\u751f\u4eba\u6570\u7684\u4e00\u534a\u6bd4\u7537\u751f\u603b\u6570\u5c1110\u4eba\uff0c\u82e5\u8bbe\u7537\u751f\u4eba\u6570\u4e3ax\u4eba\uff0c\u5973\u751f\u4eba\u6570\u4e3ay\u4eba\uff0c\u5219\u53ef\u5217\u65b9\u7a0b\u7ec4\u4e3a
17\u3001\u7532\u4e59\u4e24\u6570\u7684\u548c\u4e3a10\uff0c\u5176\u5dee\u4e3a2\uff0c\u82e5\u8bbe\u7532\u6570\u4e3ax\uff0c\u4e59\u6570\u4e3ay\uff0c\u5219\u53ef\u5217\u65b9\u7a0b\u7ec4\u4e3a
18\u3001\u5df2\u77e5\u65b9\u7a0by=kx+b\u7684\u4e24\u7ec4\u89e3\u662f \u5219k= b=
19\u3001\u67d0\u5de5\u5382\u73b0\u5728\u5e74\u4ea7\u503c\u662f150\u4e07\u5143\uff0c\u5982\u679c\u6bcf\u589e\u52a01000\u5143\u7684\u6295\u8d44\u4e00\u5e74\u53ef\u589e\u52a02500\u5143\u7684\u4ea7\u503c\uff0c\u8bbe\u65b0\u589e\u52a0\u7684\u6295\u8d44\u989d\u4e3ax\u4e07\u5143\uff0c\u603b\u4ea7\u503c\u4e3ay\u4e07\u5143\uff0c\u90a3\u4e48x,y\u6240\u6ee1\u8db3\u7684\u65b9\u7a0b\u4e3a
20\u3001\u5b66\u6821\u8d2d\u4e7035\u5f20\u7535\u5f71\u7968\u5171\u7528250\u5143\uff0c\u5176\u4e2d\u7532\u79cd\u7968\u6bcf\u5f208\u5143\uff0c\u4e59\u79cd\u7968\u6bcf\u5f206\u5143\uff0c\u8bbe\u7532\u79cd\u7968x\u5f20\uff0c\u4e59\u79cd\u7968y\u5f20\uff0c\u5219\u5217\u65b9\u7a0b\u7ec4 \uff0c\u65b9\u7a0b\u7ec4\u7684\u89e3\u662f
21\u3001\u4e00\u6839\u6728\u68d2\u957f8\u7c73\uff0c\u5206\u6210\u4e24\u6bb5\uff0c\u5176\u4e2d\u4e00\u6bb5\u6bd4\u53e6\u4e00\u6bb5\u957f1\u7c73\uff0c\u6c42\u8fd9\u4e24\u6bb5\u7684\u957f\u65f6\uff0c\u8bbe\u5176\u4e2d\u4e00\u6bb5\u4e3ax\u7c73\uff0c\u53e6\u4e00\u6bb5\u4e3ay\uff0c\u90a3\u4e48\u5217\u7684\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\u4e3a
22\u3001\u4e00\u4e2a\u77e9\u5f62\u5468\u957f\u4e3a20cm\uff0c\u4e14\u957f\u6bd4\u5bbd\u59272cm\uff0c\u5219\u77e9\u5f62\u7684\u957f\u4e3a cm\uff0c\u5bbd\u4e3a cm
23\u3001 \u4e03\uff082\uff09\u73ed\u6709\u4efb\u8bfe\u6559\u5e086\u540d,\u5b66\u751f30\u540d,\u5176\u4e2d\u7537\u751f\u5360\u5168\u73ed\u5b66\u751f\u768460\uff05\uff0c\u82e5\u753b\u51fa\u8be5\u73ed\u5168\u4f53\u5e08\u751f\u4eba\u6570\u7684\u6247\u5f62\u7edf\u8ba1\u56fe,\u7537\u751f\u6240\u5360\u7684\u6247\u5f62\u7684\u5706\u5fc3\u89d2\u4e3a .
24\u3001\u5c0f\u5229\u6301250\u5143\u94b1\u5230\u4e00\u8d85\u5e02\u8d2d\u4e70\u4e00\u7269\u54c1,\u53d1\u73b0\u6bcf\u4e2a\u7269\u54c1\u4e0a\u6807\u4ef7\u4e3a2.5\u5143/\u4e2a,\u800c\u5728\u8d85\u5e02\u7684\u4fc3\u9500\u5e7f\u544a\u4e0a\u5374\u6807\u660e:\u4e70\u8fd9\u79cd\u7269\u54c1\u8fbe\u5230100\u4e2a\u4ee5\u4e0a\uff08\u4e0d\u5305\u62ec100\u4e2a\uff09\u552e\u4ef7\u4e3a2.4\u5143/\u4e2a,\u5c0f\u5229\u7528\u624b\u4e2d\u7684\u94b1\u6700\u591a\u53ef\u4e70 \u4e2a\u8fd9\u79cd\u7269\u54c1.
25\u3001\u67d0\u540c\u5b66\u4e7080\u5206\u90ae\u7968\u4e0e\u4e00\u5143\u90ae\u7968\u5171\u82b116\u5143\uff0c\u5df2\u77e5\u4e70\u7684\u4e00\u5143\u90ae\u7968\u6bd480\u5206\u90ae\u7968\u5c112\u679a\uff0c\u8bbe\u4e7080\u5206\u90ae\u7968 \u679a\uff0c\u5219\u4f9d\u9898\u610f\u5f97\u5230\u65b9\u7a0b\u4e3a\uff08\uff09
26\u3001\u67d0\u79cd\u5546\u54c1\u7684\u8fdb\u4ef7\u4e3a15\u5143\uff0c\u51fa\u552e\u65f6\u6807\u4ef7\u662f22.5\u5143\u3002\u7531\u4e8e\u5e02\u573a\u4e0d\u666f\u6c14\u9500\u552e\u60c5\u51b5\u4e0d\u597d\uff0c\u5546\u5e97\u51c6\u5907\u964d\u4ef7\u5904\u7406\uff0c\u4f46\u8981\u4fdd\u8bc1\u5229\u6da6\u7387\u4e0d\u4f4e\u4e8e10\uff05\uff0c\u90a3\u4e48\u8be5\u5e97\u6700\u591a\u964d\u4ef7_______\u5143\u51fa\u552e\u8be5\u5546\u54c1\u3002
27\u3001\u6709\u4e00\u4e2a\u5546\u5e97\u628a\u67d0\u4ef6\u5546\u54c1\u6309\u8fdb\u4ef7\u52a020%\u4f5c\u4e3a\u5b9a\u4ef7\uff0c\u53ef\u662f\u603b\u5356\u4e0d\u51fa\u53bb\uff1b\u540e\u6765\u8001\u677f\u6309\u5b9a\u4ef7\u51cf20%\u4ee596\u5143\u51fa\u552e\uff0c\u5f88\u5feb\u5c31\u5356\u6389\u4e86\u3002\u5219\u8fd9\u6b21\u751f\u610f\u76c8\u4e8f\u60c5\u51b5\u662f\uff08 \uff09
A\u3001\u8d5a6\u5143 B\u3001\u4e0d\u4e8f\u4e0d\u8d5a C\u3001\u4e8f4\u5143 D\u3001\u4e8f24\u5143
28\u3001\u73ed\u7ea7\u7ec4\u7ec7\u6709\u5956\u77e5\u8bc6\u7ade\u8d5b\uff0c\u5c0f\u660e\u7528100\u5143\u73ed\u8d39\u8d2d\u4e70\u7b14\u8bb0\u672c\u548c\u94a2\u7b14\u517130\u4ef6\uff0c\u5df2\u77e5\u7b14\u8bb0\u672c\u6bcf\u672c2\u5143\uff0c\u94a2\u7b14\u6bcf\u652f5\u5143\uff0c\u90a3\u4e48\u5c0f\u660e\u6700\u591a\u80fd\u4e70\u94a2\u7b14\uff08 \uff09
A\u300120\u652f B\u300114\u652f C\u300113\u652f D\u300110\u652f
29\u3001\u67d0\u5546\u5e97\u9500\u552e\u4e00\u6279\u670d\u88c5\uff0c\u6bcf\u4ef6\u552e\u4ef7150\u5143\uff0c\u53ef\u83b7\u522925%\uff0c\u6c42\u8fd9\u79cd\u670d\u88c5\u7684\u6210\u672c\u4ef7\u3002\u8bbe\u8fd9\u79cd\u670d\u88c5\u7684\u6210\u672c\u4ef7\u4e3ax\u5143\uff0c\u5219\u5f97\u5230\u7684\u65b9\u7a0b\u662f\uff08 \uff09
A\u3001150\uff0dxx \uff1d25% B\u3001150\uff0dx\uff1d25% C\u3001x\uff1d150\u00d725% D\u300125%•x =150
30\u3001\u5b66\u6821\u98df\u5802\u51fa\u552e\u4e24\u79cd\u539a\u5ea6\u4e00\u6837\u4f46\u5927\u5c0f\u4e0d\u540c\u7684\u9762\u997c\uff0c\u5c0f\u997c\u76f4\u5f8430cm\uff0c\u552e\u4ef730\u5206\uff0c\u5927\u997c\u76f4\u5f8440cm\uff0c\u552e\u4ef740\u5206\u3002\u4f60\u66f4\u613f\u610f\u4e70__________\u997c\uff0c\u539f\u56e0_____________
31\u3001\u67d0\u4e66\u57ce\u5f00\u5c55\u5b66\u751f\u4f18\u60e0\u6d3b\u52a8\uff0c\u51e1\u4e00\u6b21\u6027\u8d2d\u4e66\u4e0d\u8d85\u8fc7200\u5143\u7684\u4e00\u5f8b\u4e5d\u6298\u4f18\u60e0\uff0c\u8d85\u8fc7200\u5143\u7684\u5176\u4e2d200\u5143\u6309\u4e5d\u6298\u7b97\uff0c\u8d85\u8fc7\u7684\u90e8\u5206\u6309\u516b\u6298\u7b97\u3002\u67d0\u5b66\u751f\u4e00\u6b21\u53bb\u8d2d\u4e66\u4ed8\u6b3e72\u5143\uff0c\u7b2c\u4e8c\u6b21\u53c8\u53bb\u8d2d\u4e66\u4eab\u53d7\u4e86\u516b\u6298\u4f18\u60e0\uff0c\u4ed6\u67e5\u770b\u4e86\u6240\u4e70\u4e66\u7684\u5b9a\u4ef7\uff0c\u53d1\u73b0\u4e24\u6b21\u5171\u8282\u7701\u4e8634\u5143\u94b1\u3002\u5219\u8be5\u5b66\u751f\u7b2c\u4e8c\u6b21\u8d2d\u4e66\u5b9e\u9645\u4ed8\u6b3e_________________________\u5143\u3002
32\u3001\u67d0\u539f\u6599\u4f9b\u5e94\u5546\u5bf9\u8d2d\u4e70\u5176\u539f\u6599\u7684\u987e\u5ba2\u5b9e\u884c\u5982\u4e0b\u4f18\u60e0\u529e\u6cd5\uff1a\uff081\uff09\u4e00\u6b21\u8d2d\u4e70\u91d1\u989d\u4e0d\u8d85\u8fc71\u4e07\u5143\u7684\u4e0d\u4e88\u4f18\u60e0\uff1b\uff082\uff09\u4e00\u6b21\u8d2d\u4e70\u91d1\u989d\u8d85\u8fc71\u4e07\u5143\uff0c\u4f46\u4e0d\u8d85\u8fc73\u4e07\u5143\u7684\u4e5d\u6298\u4f18\u60e0\uff1b\uff083\uff09\u4e00\u6b21\u8d2d\u4e70\u91d1\u989d\u8d85\u8fc73\u4e07\u5143\uff0c\u5176\u4e2d3\u4e07\u5143\u4e5d\u6298\u4f18\u60e0\uff0c\u8d85\u8fc73\u4e07\u5143\u7684\u90e8\u5206\u516b\u6298\u4f18\u60e0\u3002\u67d0\u5382\u56e0\u5e93\u5b58\u539f\u56e0\uff0c\u7b2c\u4e00\u6b21\u5728\u8be5\u4f9b\u5e94\u5546\u5904\u8d2d\u4e70\u539f\u6599\u4ed8\u6b3e7800\u5143\uff0c\u7b2c\u4e8c\u6b21\u8d2d\u4e70\u4ed8\u6b3e26100\u5143\u3002\u5982\u679c\u4ed6\u662f\u4e00\u6b21\u6027\u8d2d\u4e70\u540c\u6837\u7684\u539f\u6599\uff0c\u53ef\u5c11\u4ed8\u6b3e\uff08 \uff09
A\u30011460\u5143 B\u30011540\u5143 C\u30011560\u5143 D\u30012000\u5143
33\u3001\u4e03\u5e74\u7ea7\u8db3\u7403\u5faa\u73af\u8d5b\u4e2d,\u89c4\u5b9a\u80dc\u4e00\u573a\u5f973\u5206,\u5e73\u4e00\u573a\u5f971\u5206,\u8d1f\u4e00\u573a\u5f970\u5206.\u73b0\u5728\u4e03(\u4e00)\u73ed\u5df2\u8d5b8\u573a,\u83b719\u5206.\u90a3\u4e48\u4e03(\u4e00)\u73ed\u73b0\u5728\u7684\u6218\u51b5\u662f____________________(\u8bf4\u660e:\u586b"\u80dc\u51e0\u573a,\u5e73\u51e0\u573a,\u8d1f\u51e0\u573a\u201d)
\u77e5\u80fd\u70b92 \u53e4\u4ee3\u95ee\u9898
1\uff0e\u53e4\u9898\uff1a\u201c\u6211\u95ee\u5f00\u5e97\u674e\u4e09\u516c\uff0c\u4f17\u5ba2\u90fd\u6765\u5230\u5e97\u4e2d\uff0c\u4e00\u623f\u4e03\u5ba2\u591a\u4e03\u5ba2\uff0c\u4e00\u623f\u4e5d\u5ba2\u4e00\u623f\u7a7a\uff0e\u201d\u90a3\u4e48\u6709_______\u95f4\u623f\uff0c\u6709_____\u4f4d\u5ba2\u4eba\uff0e
2\uff0e\u4eca\u6709\u5927\u3001\u5c0f\u76db\u7c73\u6876\uff0c5\u4e2a\u5927\u6876\u52a0\u4e0a1\u4e2a\u5c0f\u6876\uff0c\u53ef\u76db3\u659b\u7c73\uff1b1\u4e2a\u5927\u6876\u52a0\u4e0a5\u4e2a\u5c0f\u6876\uff0c\u53ef\u76db2\u659b\u7c73\uff0c\u6c42\u5927\u3001\u5c0f\u6876\u5404\u76db\u591a\u5c11\u7c73\uff08\u659b\uff1a\u91cf\u5668\u540d\uff0c\u53e4\u65f6\u7528\uff09\uff0e\u82e5\u8bbe\u5927\u6876\u76dbx\u659b\u7c73\uff0c\u5c0f\u6876\u76dby\u659b\u7c73\uff0c\u5219\u53ef\u5217\u65b9\u7a0b\u7ec4\u4e3a__________\uff0e
3\uff0e\u201c\u4eca\u6709\u9e21\u3001\u5154\u540c\u7b3c\uff0c\u4e0a\u6709\u4e09\u5341\u4e94\u5934\uff0c\u4e0b\u6709\u4e5d\u5341\u56db\u8db3\uff0c\u95ee\u9e21\u5154\u5404\u51e0\u4f55\u201d\uff0e\u9898\u76ee\u5927\u610f\uff1a\u5728\u73b0\u6709\u9e21\u3001\u5154\u5728\u540c\u4e00\u4e2a\u7b3c\u5b50\u91cc\uff0c\u4e0a\u8fb9\u6570\u670935\u4e2a\u5934\uff0c\u4e0b\u8fb9\u6570\u670994\u53ea\u811a\uff0c\u6c42\u9e21\u3001\u5154\u5404\u6709\u591a\u5c11\u53ea\uff0e
4\uff0e\u300a\u5e0c\u814a\u6587\u96c6\u300b\u4e2d\u6709\u4e00\u4e9b\u7528\u7ae5\u8bdd\u5f62\u5f0f\u5199\u6210\u7684\u6570\u5b66\u9898\uff0e\u6bd4\u5982\u9a74\u548c\u9aa1\u5b50\u9a6e\u8d27\u7269\u8fd9\u9053\u9898\uff0c\u5c31\u66fe\u7ecf\u88ab\u5927\u6570\u5b66\u5bb6\u6b27\u62c9\u6539\u7f16\u8fc7\uff0c\u9898\u76ee\u662f\u8fd9\u6837\u7684\uff1a\u9a74\u548c\u9aa1\u5b50\u9a6e\u7740\u8d27\u7269\u5e76\u6392\u8d70\u5728\u8def\u4e0a\uff0c\u9a74\u4e0d\u4f4f\u5730\u57cb\u6028\u81ea\u5df1\u9a6e\u7684\u8d27\u7269\u592a\u91cd\uff0c\u538b\u5f97\u53d7\u4e0d\u4e86\uff0e\u9aa1\u5b50\u5bf9\u9a74\u8bf4\uff1a\u201c\u4f60\u53d1\u4ec0\u4e48\u7262\u9a9a\u554a\uff01\u6211\u9a6e\u7684\u8d27\u7269\u6bd4\u4f60\u91cd\uff0c\u5047\u82e5\u4f60\u7684\u8d27\u7269\u7ed9\u6211\u4e00\u53e3\u888b\uff0c\u6211\u9a6e\u4e0a\u7684\u8d27\u5c31\u6bd4\u4f60\u9a6e\u7684\u91cd\u4e00\u500d\uff0c\u800c\u6211\u82e5\u7ed9\u4f60\u4e00\u53e3\u888b\uff0c\u54b1\u4fe9\u9a6e\u7684\u624d\u4e00\u6837\u591a\uff0e\u201d\u90a3\u4e48\u9a74\u548c\u9aa1\u5b50\u5404\u9a6e\u51e0\u53e3\u888b\u8d27\u7269\uff1f
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\uff08\u548c\u5dee\u500d\u95ee\u9898\u3001\u884c\u7a0b\u95ee\u9898\uff09\u4e00\u6761\u516c\u8def\uff0c\u7b2c\u4e00\u5929\u4fee\u4e86\u5168\u7a0b\u76848\u5206\u4e4b\u4e00\u591a5\u7c73\uff1b\u7b2c\u4e8c\u5929\u4fee\u4e86\u5168\u7a0b\u76845\u5206\u4e4b\u4e00\u5c1114\u7c73\uff0c\u8fd8\u526963\u7c73\uff0c\u6c42\u8fd9\u6761\u516c\u8def\u6709\u591a\u957f\uff1f
\u89e3\uff1a\u8bbe\u666e\u901a\u516c\u8def x \u5343\u7c73\uff0c\u9ad8\u901f\u516c\u8def y \u5343\u7c73\uff0c\u6839\u636e\u9898\u610f\uff0c\u5f97\uff1a
2x = y
x/60 + y/100 = 2.2
x = 60 , y = 120
x + y = 180
\u7b54\uff1a\u666e\u901a\u516c\u8def 60 \u5343\u7c73\uff0c\u9ad8\u901f\u516c\u8def 120 \u5343\u7c73\uff0c\u516c\u8def\u5168\u957f 180 \u5343\u7c73\u3002
\u89e3\uff1a\u8bbe\u666e\u901a\u516c\u8def\u884c\u9a76 x \u5c0f\u65f6\uff0c\u9ad8\u901f\u516c\u8def\u884c\u9a76 y \u5c0f\u65f6\uff0c\u6839\u636e\u9898\u610f\uff0c\u5f97\uff1a
x + y = 2.2
120x = 100y
x = 1 , y = 1.2
60x + 100y = 180
\u7b54\uff1a\u666e\u901a\u516c\u8def\u884c\u9a76 1 \u5c0f\u65f6\uff0c\u9ad8\u901f\u516c\u8def\u884c\u9a76 1.2 \u5c0f\u65f6\uff0c\u516c\u8def\u5168\u957f 180 \u5343\u7c73\u3002
4小时42分=4.7小时
设去的时候有上坡x千米，下坡y千米，则平路142-x-y千米
(142-x-y)/30+x/28+y/35=4.5（1）
(142-x-y)/30+x/35+y/28=4.7（2）
两式相减得y/140-x/140=0.2
y-x=28
y=x+28
代入1式
(142-2x-28)/30+x/28+(x+28)/35=4.5
（57-x）/15+x/28+（x+28）/35=4.5
1596-28x+15x+12x+336=1890
x=1596+336-1890
x=42
y=x+28
y=70
142-x-y=30
去的时候上坡42千米，下坡70千米，平路30千米
回来的时候下坡42千米，上坡70千米，平路30千米
绛旓細瑙:(1)-(2)寰:2ny=-13 鍒,n=-6.5/y (3)(1)+(2)寰:2mx=-3 鍒,m=-1.5/x (4)鍥犱负鐢茬湅閿欎簡m,鎵浠ュ叧浜巒鐨勮绠椾竴瀹氭纭,鍒欑敳鐨勭瓟妗堜竴瀹氭弧瓒(3)鑰岀敳绠楀嚭y=2 鎵浠,n=-6.5/2 n=-13/4 鍚岀悊,涔欑殑绛旀涓瀹氭弧瓒(4)鎵浠,m=-1.5/2 m=-3/4 ...
绛旓細2.璁炬湁X涓敺鐢燂紝鍒欐湁50-X涓コ鐢3X+2脳锛50-X锛=120-5 X=15 50-15=35 鏈15涓敺鐢熴35涓コ鐢 3.锛1锛夊垪绠楀紡锛氬亣璁惧垬鍐叏鍋氬杩欐椂鍙緱8脳20=160鍒 姣忛敊涓棰樺簲鎵8+4=12鍒嗭紙鍋氬寰楃殑8鍒嗗姞涓婂仛閿欏掓墸鐨4鍒嗭級鍋氶敊浜嗭細锛160-112锛壝12=4棰 鍋氬浜嗭細20-4=16棰 锛2锛夊垪鏂圭▼锛氳鍋...
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绛旓細{x+y=499 鈶 {0.7x+0.9y=399 鈶 鐢扁憼锛屽緱 x=499-y 3 鎶3浠ｅ叆鈶★紝寰 0.7锛499-y锛+0.9y=399 y=248.5 鎶妝=248.5浠ｅ叆3锛屽緱 x=250.5 鈭磋繖涓鏂圭▼缁鐨勮В涓簒=250.5 y=248.5 绛旓細鐢茶繘浠250.5鍏 涔欒繘浠248.5 2.瑙ｏ細璁剧涓绉嶅瓨x鍏 绗簩绉嶅瓨y鍏 {x+y=800 ...
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绛旓細璁惧畠浠悇闇X鍗冨厠锛孻鍗冨厠 鍒 X+Y=100 0.2X+0.12Y=15 Y=100-X 浠ｅ叆 0.2X+0.12Y=15 0.2x+0.12*[100-x]=15 0.2x+12-0.12x=15 0.08x=3 x=3/0.08=300/8=37.5 浠庤 u=100-x=100-37.5=62.5 鍒 瀹冧滑鍚勯渶37.5鍗冨厠锛62.5鍗冨厠 ...
绛旓細瑙:鎸夊绾15kg娲楄。姘(鍖呮嫭琛ｆ湇)璁＄畻.璁捐繕闇鍔燲鍏嬫礂琛ｇ矇,娣籝鍗冨厠姘存瘮杈冨悎閫傦紝鍒欑敱棰樺凡鐭,寰椾笅鏂圭▼缁:X/1000+0.02+Y=15-4=11...(1)(0.02+X/1000)/11=0.4%...(2)瑙ｄ笂鏂圭▼缁,寰 X=0.04(鍗冨厠)Y=10.956(鍗冨厠)绛:杩橀渶鍔0.04鍗冨厠娲楄。绮,娣10.956鍗冨厠姘存瘮杈冨悎閫....
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