七年级上册解方程应用题100道
\u521d\u4e00\u4e0a\u534a\u5e74\u89e3\u65b9\u7a0b\u5e94\u7528\u9898100\u9053 \u6709\u7b54\u68481.\u4e24\u8f66\u7ad9\u76f8\u8ddd275km\uff0c\u6162\u8f66\u4ee550km/\u4e00\u5c0f\u65f6\u7684\u901f\u5ea6\u4ece\u7532\u7ad9\u5f00\u5f80\u4e59\u7ad9\uff0c1h\u65f6\u540e\uff0c\u5feb\u8f66\u4ee5\u6bcf\u5c0f\u65f675km\u7684\u901f\u5ea6\u4ece\u4e59\u7ad9\u5f00\u5f80\u7532\u7ad9\uff0c\u90a3\u4e48\u6162\u8f66\u5f00\u51fa\u51e0\u5c0f\u65f6\u540e\u4e0e\u5feb\u8f66\u76f8\u9047\uff1f
\u8bbe\u6162\u8f66\u5f00\u51faa\u5c0f\u65f6\u540e\u4e0e\u5feb\u8f66\u76f8\u9047
50a+75\uff08a-1\uff09=275
50a+75a-75=275
125a=350
a=2.8\u5c0f\u65f6
2.\u4e00\u8f86\u6c7d\u8f66\u4ee5\u6bcf\u5c0f\u65f640km\u7684\u901f\u5ea6\u7531\u7532\u5730\u5f00\u5f80\u4e59\u5730\uff0c\u8f66\u884c3h\u540e\uff0c\u56e0\u9047\u96e8\uff0c\u5e73\u5747\u901f\u5ea6\u88ab\u8feb\u6bcf\u5c0f\u65f6\u51cf\u5c1110km\uff0c\u7ed3\u679c\u5230\u4e59\u5730\u6bd4\u9884\u8ba1\u7684\u65f6\u95f4\u665a\u4e8645min\uff0c\u6c42\u7532 \u4e59\u4e24\u5730\u8ddd\u79bb\u3002
\u8bbe\u539f\u5b9a\u65f6\u95f4\u4e3aa\u5c0f\u65f6
45\u5206\u949f=3/4\u5c0f\u65f6
\u6839\u636e\u9898\u610f
40a=40\u00d73+\uff0840-10\uff09\u00d7\uff08a-3+3/4\uff09
40a=120+30a-67.5
10a=52.5
a=5.25=5\u53c81/4\u5c0f\u65f6=21/4\u5c0f\u65f6
\u6240\u4ee5\u7532\u4e59\u8ddd\u79bb40\u00d721/4=210\u5343\u7c73
3\u3001\u67d0\u8f66\u95f4\u7684\u94b3\u5de5\u73ed\uff0c\u5206\u4e24\u961f\u53c2\u89c1\u690d\u6811\u52b3\u52a8\uff0c\u7532\u961f\u4eba\u6570\u662f\u4e59\u961f\u4eba\u6570\u7684 2\u500d\uff0c\u4ece\u7532\u961f\u8c0316\u4eba\u5230\u4e59\u961f\uff0c\u5219\u7532\u961f\u5269\u4e0b\u7684\u4eba\u6570\u6bd4\u4e59\u961f\u7684\u4eba\u6570\u7684 \u4e00\u534a\u5c113\u4eba\uff0c\u6c42\u7532\u4e59\u4e24\u961f\u539f\u6765\u7684\u4eba\u6570\uff1f
\u89e3\uff1a\u8bbe\u4e59\u961f\u539f\u6765\u6709a\u4eba\uff0c\u7532\u961f\u67092a\u4eba
\u90a3\u4e48\u6839\u636e\u9898\u610f
2a-16=1/2\u00d7\uff08a+16\uff09-3
4a-32=a+16-6
3a=42
a=14
\u90a3\u4e48\u4e59\u961f\u539f\u6765\u670914\u4eba\uff0c\u7532\u961f\u539f\u6765\u670914\u00d72=28\u4eba
\u73b0\u5728\u4e59\u961f\u670914+16=30\u4eba\uff0c\u7532\u961f\u670928-16=12\u4eba
4\u3001\u5df2\u77e5\u67d0\u5546\u5e973\u6708\u4efd\u7684\u5229\u6da6\u4e3a10\u4e07\u5143,5\u6708\u4efd\u7684\u5229\u6da6\u4e3a13.2\u4e07\u5143,5\u6708\u4efd\u6708\u589e\u957f\u7387\u6bd44\u6708\u4efd\u589e\u52a0\u4e8610\u4e2a\u767e\u5206\u70b9.\u6c423\u6708\u4efd \u7684\u6708\u589e\u957f\u7387\u3002
\u89e3\uff1a\u8bbe\u56db\u6708\u4efd\u7684\u5229\u6da6\u4e3ax
\u5219x*(1+10%)=13.2
\u6240\u4ee5x=12
\u8bbe3\u6708\u4efd\u7684\u589e\u957f\u7387\u4e3ay
\u521910*(1+y)=x
y=0.2=20%
\u6240\u4ee53\u6708\u4efd\u7684\u589e\u957f\u7387\u4e3a20%
5\u3001\u67d0\u6821\u4e3a\u5bc4\u5bbf\u5b66\u751f\u5b89\u6392\u5bbf\u820d\uff0c\u5982\u679c\u6bcf\u95f4\u5bbf\u820d\u4f4f7\u4eba\uff0c\u5462\u4e48\u67096\u4eba\u65e0\u6cd5\u5b89\u6392\u3002\u5982\u679c\u6bcf\u95f4\u5bbf\u820d\u4f4f8\u4eba\uff0c\u90a3\u4e48\u6709\u4e00\u95f4\u53ea\u4f4f\u4e864\u4eba\uff0c\u4e14\u8fd8\u7a7a\u77405\u89c1\u5bbf\u820d\u3002\u6c42\u6709\u591a\u5c11\u4eba\uff1f
\u89e3\uff1a\u8bbe\u6709a\u95f4\uff0c\u603b\u4eba\u65707a+6\u4eba
7a+6=8\uff08a-5-1\uff09+4
7a+6=8a-44
a=50
\u6709\u4eba=7\u00d750+6=356\u4eba
6\u3001\u4e00\u5343\u514b\u7684\u82b1\u751f\u53ef\u4ee5\u70b80.56\u5343\u514b\u82b1\u751f\u6cb9\uff0c\u90a3\u4e48280\u5343\u514b\u53ef\u4ee5\u70b8\u51e0\u591a\u82b1\u751f\u6cb9\uff1f
\u6309\u6bd4\u4f8b\u89e3\u51b3
\u8bbe\u53ef\u4ee5\u70b8a\u5343\u514b\u82b1\u751f\u6cb9
1\uff1a0.56=280\uff1aa
a=280\u00d70.56=156.8\u5343\u514b
\u5b8c\u6574\u7b97\u5f0f\uff1a280\u00f71\u00d70.56=156.8\u5343\u514b
7\u3001\u4e00\u6279\u4e66\u672c\u5206\u7ed9\u4e00\u73ed\u6bcf\u4eba10\u672c\uff0c\u5206\u7ed9\u4e8c\u73ed\u6bcf\u4eba15\u672c\uff0c\u73b0\u5747\u5206\u7ed9\u4e24\u4e2a\u73ed\uff0c\u6bcf\u4eba\u51e0\u672c\uff1f
\u89e3\uff1a\u8bbe\u603b\u7684\u4e66\u6709a\u672c
\u4e00\u73ed\u4eba\u6570=a/10
\u4e8c\u73ed\u4eba\u6570=a/15
\u90a3\u4e48\u5747\u5206\u7ed92\u73ed\uff0c\u6bcf\u4ebaa/\uff08a/10+a/15\uff09=10\u00d715/\uff0810+15\uff09=150/25=6\u672c
8\u3001\u516d\u4e00\u4e2d\u961f\u7684\u690d\u6811\u5c0f\u961f\u53bb\u690d\u6811\uff0c\u5982\u679c\u6bcf\u4eba\u690d\u68115\u68f5\uff0c\u8fd8\u5269\u4e0b14\u68f5\u6811\u82d7\uff0c\u5982\u679c\u6bcf\u4eba\u690d\u68117\u68f5\uff0c\u5c31\u5c116\u68f5\u6811\u82d7\u3002\u8fd9\u4e2a\u5c0f\u961f\u6709\u591a\u5c11\u4eba\uff1f\u4e00\u5171\u6709\u591a\u5c11\u68f5\u6811\u82d7\uff1f
\u89e3\uff1a\u8bbe\u6709a\u4eba
5a+14=7a-6
2a=20
a=10
\u4e00\u5171\u670910\u4eba
\u6709\u6811\u82d75\u00d710+14=64\u68f5
9\u3001\u4e00\u6876\u6cb9\u8fde\u6cb9\u5e26\u7b52\u91cd50kg\uff0c\u7b2c\u4e00\u6b21\u5012\u51fa\u8c46\u6cb9\u7684\u7684\u4e00\u534a\u5c11\u56db\u5343\u514b\uff0c\u7b2c\u4e8c\u6b21\u5012\u51fa\u4f59\u4e0b\u7684\u56db\u5206\u4e4b\u4e09\u591a\u4e8c\u53c8\u4e09\u5206\u4e4b\u4e8ckg\uff0c\u8fd9\u65f6\u8fde\u6cb9\u5e26\u6876\u5171\u91cd\u4e09\u5206\u4e4b\u4e00kg\uff0c\u539f\u6765\u6876\u4e2d\u6709\u591a\u5c11\u6cb9\uff1f
\u89e3\uff1a\u8bbe\u6cb9\u91cda\u5343\u514b
\u90a3\u4e48\u6876\u91cd50-a\u5343\u514b
\u7b2c\u4e00\u6b21\u5012\u51fa1/2a-4\u5343\u514b\uff0c\u8fd8\u5269\u4e0b1/2a+4\u5343\u514b
\u7b2c\u4e8c\u6b21\u5012\u51fa3/4\u00d7\uff081/2a+4\uff09+8/3=3/8a+17/3\u5343\u514b\uff0c\u8fd8\u5269\u4e0b1/2a+4-3/8a-17/3=1/8a-5/3\u5343\u514b\u6cb9
\u6839\u636e\u9898\u610f
1/8a-5/3+50-a=1/3
48=7/8a
a=384/7\u5343\u514b
\u539f\u6765\u6709\u6cb9384/7\u5343\u514b
10\u3001\u7528\u4e00\u634696\u7c73\u7684\u5e03\u4e3a\u516d\u5e74\u7ea7\u67d0\u4e2a\u73ed\u7684\u5b66\u751f\u505a\u8863\u670d\uff0c\u505a15\u5957\u7528\u4e8633\u7c73\u5e03\uff0c\u7167\u8fd9\u6837\u8ba1\u7b97\uff0c\u8fd9\u4e9b\u5e03\u4e3a\u54ea\u4e2a\u73ed\u505a\u6821\u670d\u6700\u5408\u9002\uff1f\uff081\u73ed42\u4eba\uff0c2\u73ed43\u4eba\uff0c3\u73ed45\u4eba\uff09
\u8bbe96\u7c73\u4e3aa\u4e2a\u4eba\u505a
\u6839\u636e\u9898\u610f
96\uff1aa=33\uff1a15
33a=96\u00d715
a\u224843.6
\u6240\u4ee5\u4e3a2\u73ed\u505a\u5408\u9002\uff0c\u6709\u5bcc\u4f59\uff0c\u4f46\u662f\u5bcc\u4f59\u4e0d\u591a\uff0c\u4e3a3\u73ed\u505a\u5c31\u4e0d\u591f\u4e86
11\u3001\u4e00\u4e2a\u5206\u6570\uff0c\u5982\u679c\u5206\u5b50\u52a0\u4e0a123\uff0c\u5206\u6bcd\u51cf\u53bb163\uff0c\u90a3\u4e48\u65b0\u5206\u6570\u7ea6\u5206\u540e\u662f3/4\uff1b\u5982\u679c\u5206\u5b50\u52a0\u4e0a73\uff0c\u5206\u6bcd\u52a0\u4e0a37\uff0c\u90a3\u4e48\u65b0\u5206\u6570\u7ea6\u5206\u540e\u662f1/2\uff0c\u6c42\u539f\u5206\u6570\u3002
\u89e3\uff1a\u8bbe\u539f\u5206\u6570\u5206\u5b50\u52a0\u4e0a123\uff0c\u5206\u6bcd\u51cf\u53bb163\u540e\u4e3a3a/4a
\u6839\u636e\u9898\u610f
\uff083a-123+73\uff09/\uff084a+163+37\uff09=1/2
6a-100=4a+200
2a=300
a=150
\u90a3\u4e48\u539f\u5206\u6570=\uff083\u00d7150-123\uff09/\uff084\u00d7150+163\uff09=327/763
12\u3001\u6c34\u679c\u5e97\u8fd0\u8fdb\u4e00\u6279\u6c34\u679c\uff0c\u7b2c\u4e00\u5929\u5356\u4e8660\u5343\u514b\uff0c\u6b63\u597d\u662f\u7b2c\u4e8c\u5929\u5356\u7684\u4e09\u5206\u4e4b\u4e8c\uff0c\u4e24\u5929\u5171\u5356\u5168\u90e8\u6c34\u679c\u7684\u56db\u5206\u4e4b\u4e00\uff0c\u8fd9\u6279\u6c34\u679c\u539f\u6709\u591a\u5c11\u5343\u514b\uff08\u7528\u65b9\u7a0b\u89e3\uff09
\u8bbe\u6c34\u679c\u539f\u6765\u6709a\u5343\u514b
60+60/\uff082/3\uff09=1/4a
60+90=1/4a
1/4a=150
a=600\u5343\u514b
\u6c34\u679c\u539f\u6765\u6709600\u5343\u514b
13\u3001\u4ed3\u5e93\u6709\u4e00\u6279\u8d27\u7269\uff0c\u8fd0\u51fa\u4e94\u5206\u4e4b\u4e09\u540e\uff0c\u8fd9\u65f6\u4ed3\u5e93\u91cc\u53c8\u8fd0\u8fdb20\u5428\uff0c\u6b64\u65f6\u7684\u8d27\u7269\u6b63\u597d\u662f\u539f\u6765\u7684\u4e8c\u5206\u4e4b\u4e00\uff0c\u4ed3\u5e93\u539f\u6765\u6709\u591a\u5c11\u5428\uff1f\uff08\u7528\u65b9\u7a0b\u89e3\uff09
\u8bbe\u539f\u6765\u6709a\u5428
a\u00d7\uff081-3/5\uff09+20=1/2a
0.4a+20=0.5a
0.1a=20
a=200
\u539f\u6765\u6709200\u5428
14\u3001\u738b\u5927\u53d4\u752848\u7c73\u957f\u7684\u7bf1\u7b06\u9760\u5899\u56f4\u4e00\u5757\u957f\u65b9\u5f62\u83dc\u5730\u3002\u8fd9\u4e2a\u957f\u65b9\u5f62\u7684\u957f\u548c\u5bbd\u7684\u6bd4\u662f5\uff1a2\u3002\u8fd9\u5757\u83dc\u5730\u7684\u9762\u79ef\u662f\u591a\u5c11\uff1f
\u89e3\uff1a\u8bbe\u957f\u53ef\u5bbd\u5206\u522b\u4e3a5a\u7c73\uff0c2a\u7c73
\u6839\u636e\u9898\u610f
5a+2a\u00d72=48\uff08\u6b64\u65f6\u7528\u5899\u4f5c\u4e3a\u5bbd\uff09
9a=48
a=16/3
\u957f=80/3\u7c73
\u5bbd=32/3\u7c73
\u9762\u79ef=80/3\u00d716/3=1280/9\u5e73\u65b9\u7c73
\u6216
5a\u00d72+2a=48
12a=48
a=4
\u957f=20\u7c73
\u5bbd=8\u7c73
\u9762\u79ef=20\u00d78=160\u5e73\u65b9\u7c73
15\u3001\u67d0\u5e02\u79fb\u52a8\u7535\u8bdd\u6709\u4ee5\u4e0b\u4e24\u79cd\u8ba1\u8d39\u65b9\u6cd5\uff1a
\u7b2c\u4e00\u79cd\uff1a\u6bcf\u6708\u4ed822\u5143\u6708\u79df\u8d39\uff0c\u7136\u540e\u7f8e\u5206\u949f\u6536\u53d6\u901a\u8bdd\u8d390.2\u5143\u3002
\u7b2c\u4e8c\u79cd\uff1a\u4e0d\u6536\u6708\u79df\u8d39 \u6bcf\u5206\u949f\u6536\u53d6\u901a\u8bdd\u8d390.4\u5143\u3002
\u5982\u679c\u6bcf\u6708\u901a\u8bdd80\u5206\u949f \u54ea\u79cd\u8ba1\u8d39\u65b9\u5f0f\u4fbf\u5b9c\uff1f\u5982\u679c\u6bcf\u6708\u901a\u8bdd300\u5206\u949f\uff0c\u53c8\u662f\u54ea\u79cd\u8ba1\u8d39\u65b9\u5f0f\u4fbf\u5b9c\u5462\uff1f\uff1f
\u8bbe\u6bcf\u6708\u901a\u8bdda\u5206\u949f
\u5f53\u4e24\u79cd\u6536\u8d39\u76f8\u540c\u65f6
22+0.2a=0.4a
0.2a=22
a=110
\u6240\u4ee5\u5c31\u662f\u8bf4\u5f53\u901a\u8bdd110\u5206\u949f\u65f6\u4e8c\u8005\u6536\u8d39\u4e00\u6837
\u901a\u8bdd80\u5206\u949f\u65f6\uff0c\u7528\u7b2c\u4e8c\u79cd22+0.2\u00d780=38>0.4\u00d780=32
\u901a\u8fc7300\u5206\u949f\u65f6\uff0c\u7528\u7b2c\u4e00\u79cd22+0.2\u00d7300=82<0.4\u00d7300=120
16\u3001\u67d0\u5bb6\u5177\u5382\u670960\u540d\u5de5\u4eba\uff0c\u52a0\u5de5\u67d0\u79cd\u7531\u4e00\u4e2a\u684c\u9762\u548c\u56db\u6761\u684c\u817f\u7684\u684c\u5b50\uff0c\u5de5\u4eba\u6bcf\u5929\u7f8e\u4eba\u53ef\u4ee5\u52a0\u5de53\u4e2a\u684c\u9762\u62166\u4e2a\u684c\u817f\u3002\u600e\u4e48\u5206\u914d\u52a0\u5de5\u684c\u9762\u548c\u684c\u817f\u7684\u4eba\u6570\uff0c\u624d\u80fd\u4f7f\u6bcf\u5929\u751f\u4ea7\u7684\u684c\u9762\u548c\u684c\u817f\u914d\u5957\uff1f
\u8bbea\u4e2a\u5de5\u4eba\u52a0\u5de5\u684c\u9762\uff0c\u5219\u52a0\u5de5\u684c\u817f\u7684\u5de5\u4eba\u6709\u4f6060-a\u4eba
3a=\uff0860-a\uff09\u00d76/4
12a=360-6a
18a=360
a=20
20\u4eba\u52a0\u5de5\u684c\u9762\uff0c60-20=40\u4eba\u52a0\u5de5\u684c\u817f
17\u3001\u4e00\u67b6\u98de\u673a\u57282\u4e2a\u57ce\u5e02\u4e4b\u95f4\u98de\u884c\uff0c\u98ce\u901f\u4e3a\u6bcf\u65f624km\uff0c\u987a\u98ce\u98de\u884c\u898117/6\u65f6\uff0c\u9006\u98ce\u98de\u89813\u65f6\uff0c\u6c42\u4e24\u57ce\u5e02\u8ddd\u79bb
\u8bbe\u8ddd\u79bb\u4e3aa\u5343\u7c73
a/\uff0817/6\uff09-24=a/3+24
6a/17-a/3=48
a=2448\u5343\u7c73
18\u3001A.B\u4e24\u5730\u76f8\u8ddd12\u5343\u7c73\uff0c\u7532\u4eceA\u5730\u5230B\u5730\u505c\u755930\u5206\u949f\u540e\uff0c\u53c8\u4eceB\u5730\u8fd4\u56deA\u5730\u3002\u4e59\u4eceB\u5730\u5230A\u5730\uff0c\u5728A\u5730\u505c\u755940\u5206\u949f\u540e\uff0c\u53c8\u4eceA\u5730\u8fd4\u56deB\u5730\u3002\u5df2\u77e5\u4e24\u4eba\u540c\u65f6\u5206\u522b\u4eceA B\u4e24\u5730\u51fa\u53d1\uff0c\u7ecf\u8fc74\u5c0f\u65f6\u3002\u5728\u4ed6\u4eec\u5404\u81ea\u7684\u8fd4\u56de\u8def\u4e0a\u76f8\u9047\uff0c\u5982\u7532\u7684\u901f\u5ea6\u6bd4\u4e59\u7684\u901f\u5ea6\u6bcf\u5c0f\u65f6\u5feb1.5\u5343\u7c73\uff0c\u6c42\u4e24\u4eba\u901f\u5ea6\uff1f
\u8bbe\u4e59\u7684\u901f\u5ea6\u4e3aa\u5343\u7c73/\u5c0f\u65f6\uff0c\u5219\u7532\u7684\u901f\u5ea6\u4e3aa+1.5\u5343\u7c73/\u5c0f\u65f6
30\u5206\u949f=1/2\u5c0f\u65f6\uff0c40\u5206\u949f=2/3\u5c0f\u65f6
\uff084-2/3\uff09a+\uff08a+1.5\uff09\u00d7\uff084-1/2\uff09=12\u00d73
10/3a+7/2a+21/4=36
41/6a=123/4
a=4.5\u5343\u7c73/\u5c0f\u65f6
\u7532\u7684\u901f\u5ea6\u4e3a4.5+1.5=6\u5343\u7c73/\u5c0f\u65f6
19\u3001\u7532\u4e59\u4e24\u4eba\u5206\u522b\u4ece\u76f8\u8ddd7\u5343\u7c73\u7684AB\u4e24\u5730\u51fa\u53d1\u540c\u5411\u524d\u5f80C\u5730\uff0c\u51cc\u66686\u70b9\u4e59\u5f92\u6b65\u4eceB\u5730\u51fa\u53d1\uff0c\u7532\u9a91\u81ea\u884c\u8f66\u5728\u65e9\u66686\u70b915\u5206\u4eceA\u5730\u51fa\u53d1\u8ffd\u8d76\u4e59\uff0c\u901f\u5ea6\u662f\u4e59\u76841.5\u500d\uff0c\u5728\u4e0a\u53488\u65f645\u5206\u8ffd\u4e0a\u4e59\uff0c\u6c42\u7532\u9a91\u81ea\u884c\u8f66\u7684\u901f\u5ea6\u662f\u591a\u5c11\u3002
\u89e3\uff1a\u8bbe\u4e59\u7684\u901f\u5ea6\u4e3aa\u5343\u7c73/\u5c0f\u65f6\uff0c\u7532\u7684\u901f\u5ea6\u4e3a1.5a\u5343\u7c73/\u5c0f\u65f6
15\u5206=1/4\u5c0f\u65f6\uff0c6\u70b915\u5206\u52308\u70b945\u5206\u662f5/2\u5c0f\u65f6
\u8ddd\u79bb\u5dee=7+1/4a
\u8ffd\u53ca\u65f6\u95f4= 5/2\u5c0f\u65f6
\uff081.5a-a\uff09\u00d75/2=7+1/4a
5/4a=7+1/4a
a=7\u5343\u7c73/\u5c0f\u65f6
\u7532\u7684\u901f\u5ea6\u4e3a7\u00d71.5=10.5\u5343\u7c73/\u5c0f\u65f6
20\u3001\u5728\u4e00\u5757\u957f\u4e3a40\u7c73\uff0c\u5bbd\u4e3a30\u7c73\u7684\u957f\u65b9\u5f62\u7a7a\u5730\u4e0a\uff0c\u4fee\u5efa\u4e24\u4e2a\u5e95\u90e8\u662f\u957f\u65b9\u5f62\u4e14\u5e95\u90e8\u9762\u79ef\u4e3a198\u5e73\u65b9\u7c73\u7684\u5c0f\u697c\u623f\uff0c\u5176\u4f59\u90e8\u5206\u6210\u786c\u5316\u8def\u9762\uff0c\u82e5\u8981\u6c42\u8fd9\u4e9b\u786c\u5316\u8def\u9762\u7684\u5bbd\u76f8\u7b49\uff0c\u6c42\u786c\u5316\u8def\u9762\u7684\u5bbd\uff1f
\u8bbe\u786c\u5316\u8def\u9762\u4e3aa\u7c73
40a\u00d72+\uff0830-2a\uff09\u00d7a\u00d73=40\u00d730-198\u00d72
80a+90a-6a²=804
3a²-85a+402=0
\uff083a-67\uff09\uff08a-6\uff09=0
a=67/3\uff08\u820d\u53bb\uff09\uff0ca=6
\u6240\u4ee5\u8def\u5bbd\u4e3a6\u7c73
\u56e0\u4e3a3a<40
a<40/3
21\u3001\u7532,\u4e59\u4e24\u8239\u540c\u65f6\u7531\u6e2f\u53e3A\u51fa\u53d1\u5f00\u5f80\u6d77\u5c9bB,\u7532\u8239\u6cbf\u5317\u504f\u4e1c60\u00b0\u65b9\u5411\u5411\u6d77\u5c9bB\u822a\u884c,\uff0c\u5176\u901f\u5ea6\u4e3a15\u6d77\u91cc\uff0f\u5c0f\u65f6\uff1b\u4e59\u8239\u901f\u5ea6\u4e3a20\u6d77\u91cc\uff0f\u5c0f\u65f6\uff0c\u5148\u6cbf\u6b63\u4e1c\u65b9\u5411\u822a\u884c1\u5c0f\u65f6\u540e\uff0c\u5230\u8fbeC\u6e2f\u53e3\u63a5\u65c5\u5ba2\uff0c\u505c\u7559\u534a\u5c0f\u65f6\u540e\u518d\u8f6c\u5411\u4e1c\u5317\u65b9\u5411\u5f00\u5f80B\u5c9b\uff0c\u5176\u901f\u5ea6\u4ecd\u4e3a20\u6d77\u91cc\uff0f\u5c0f\u65f6\uff0c\u6c42\uff1a\uff081\uff09\u8bbe\u7532\u8239\u51fa\u53d1t\u5c0f\u65f6\uff0c\u4e0eB\u5c9b\u8ddd\u79bb\u4e3aS\u6d77\u91cc\uff0c\u6c42S\u548ct\u7684\u51fd\u6570\u5173\u7cfb\u5f0f\uff1f\uff082\uff09B\u5c9b\u5efa\u6709\u4e00\u5ea7\u706f\u5854\uff0c\u5728\u706f\u5854\u65b9\u57065\u6d77\u91cc\u5185\u90fd\u53ef\u4ee5\u770b\u89c1\u706f\u5854\uff0c\u95ee\u7532\uff0c\u4e59\u4e24\u8239\u90a3\u4e00\u8258\u5148\u770b\u5230\u706f\u5854\uff0c\u4e24\u8239\u770b\u5230\u706f\u5854\u7684\u65f6\u95f4\u76f8\u5dee\u591a\u5c11\uff1f\uff08\u7cbe\u786e\u5230\u5206\u949f\uff0c\u221a3=1.73\uff0c\u221a2=1.41\uff0c\u221a6=2.45\uff09
\u89e3\uff1a\uff081\uff09\u6211\u4eec\u5148\u6c42\u4e00\u4e0bAB
\u2220BAC=90-60=30\u5ea6
\u2220BCA=180-45=135\u5ea6
\u2220ABC=180-135-30=15\u5ea6
sin15=sin\uff0845-30\uff09=sin45cos30-cos45sin30=\u221a2/2\u00d7\u221a3/2-\u221a2/2\u00d71/2
=\u221a6/4-\u221a2/4=\uff08\u221a6-\u221a2\uff09/4
AC=20\u00d71=20\u6d77\u91cc
\u6839\u636e\u6b63\u5f26\u5b9a\u7406
AB/sin135=AC/sin15
AB=20\u00d7\u221a2/2/[\uff08\u221a6-\u221a2\uff09/4]=20(\u221a3+1)\u6d77\u91cc
S=AB-15t=20\uff08\u221a3+1\uff09-15t=54.6-15t
\uff082\uff09\u7532\u770b\u5230\u706f\u5854\u9700\u8981\u7684\u65f6\u95f4\u4e3at1
t1=\uff08AB-5)/15=\uff0820\u221a3+20-5\uff09/15=\uff0820\u221a3+15\uff09/15=4/3\u221a3+1\u22483.31\u5c0f\u65f6
\u4e59\u4eceC\u51fa\u53d1\u770b\u5230\u706f\u5854\u9700\u8981\u7684\u65f6\u95f4\u4e3at2
BC/sin30=AB/sin135
BC=1/2\u00d7\uff0820\u221a3+20\uff09\u00d7\u221a2=10\uff08\u221a6+\u221a2\uff09\u6d77\u91cc
t2=\uff08BC-5\uff09/20=\uff0810\u221a6+10\u221a2-5\uff09/20=\uff082\u221a6+2\u221a2-1\uff09/4\u22481.68\u5c0f\u65f6
\u4e59\u4e00\u5171\u82b1\u7684\u65f6\u95f4\u662f1+0.5+1.68=3.18\u5c0f\u65f6<3.31\u5c0f\u65f6
\u6240\u4ee5\u4e59\u5148\u770b\u5230
\u76f8\u5dee3.31-3.18=0.13\u5c0f\u65f6=7.8\u5206\u949f
22\u30012007\u5e74\u6709\u4e2d\u5c0f\u5b66\u751f5\u5343\u540d2008\u5e74\u6709\u6240\u589e\u52a0\u5c0f\u5b66\u751f\u589e\u52a0\u767e\u5206\u4e4b20\uff0c\u4e2d\u5b66\u751f\u589e\u52a0\u767e\u5206\u4e4b30\u8fd9\u68372008\u5e74\u65b0\u589e\u52a01160\u540d\uff0c\u5c0f\u5b66\u751f\u6bcf\u4eba\u6bcf\u5e74\u6536500\u5143\u4e2d\u5b66\u751f\u6bcf\u4eba\u6bcf\u5e74\u65361000\u5143\u6c422008\u5e74\u65b0\u589e\u76841160\u540d\u5171\u6536\u591a\u5c11\u201c\u501f\u8bfb\u8d39\u201d\uff1f
\u89e3\uff1a\u8bbe2007\u5e74\u6709\u5c0f\u5b66\u751fa\u4eba\uff0c\u4e2d\u5b66\u751f5000-a\u4eba
a\u00d720%+\uff085000-a\uff09\u00d730%=1160
0.2a+1500-0.3a=1160
0.1a=340
a=3400\u4eba
\u4e2d\u5b66\u751f\u67095000-3400=1600\u4eba
\u5c0f\u5b66\u751f\u589e\u52a03400\u00d720%=680\u4eba
\u589e\u52a0\u4e2d\u5b66\u751f1160-680=480\u4eba
\u5171\u6536\u501f\u8bfb\u8d39500\u00d7680+1000\u00d7480=820000=82\u4e07
23\u3001\u5546\u573a\u641e\u4fc3\u9500\u6d3b\u52a8\uff0c\u627f\u8bfa\u5927\u4ef6\u5546\u54c1\u53ef\u5206\u671f\u4ed8\u6b3e\uff0c\u4f46\u4ec5\u9650\u4e3a 2005\u5e74 \u4e94\u6708\u4e00\u65e5 \u8d2d\u4e70\u65f6\u5148\u4ed8\u4e00\u7b14\u6b3e\uff0c\u4f59\u4e0b\u90e8\u5206\u5176\u4ed6\u7684\u5229\u606f\uff08\u5e74\u5229\u6da6\u4e3a3%\uff09\u57282006\u5e74\u4e94\u6708\u4e00\u65e5 \u8fd8\u6e05\uff0c\u67d0\u7a7a\u8c03\u53c2\u4e0e\u4e86\uff0c\u5b83\u7684\u552e\u4ef7\u4e3a8120\u5143\uff0c\u82e5\u60f3\u591f\u4e70\uff0c\u6070\u597d\u4e24\u6b21\u4ed8\u6b3e\u6b64\u65f6\u76f8\u540c\uff0c\u90a3\u4e48\u5e94\u4ed8\u603b\u6b3e\u6570\u591a\u5c11\u5143\uff1f
\u8bbe\u5148\u4ed8a\u5143\uff0c\u4f59\u4e0b8120-a\u5143\u672a\u4ed8
\u6839\u636e\u9898\u610f
a=\uff088120-a\uff09\u00d7\uff081+3%\uff09
a=8363.6-1.03a
2.03a=8363.6
a=4120\u5143
\u5e94\u4ed8\u603b\u6b3e\u6570\u4e3a4120\u00d72=8240\u5143
24\u3001\u8db3\u7403\u8d5b\u5171\u8d5b8\u8f6e\uff08\u5373\u6bcf\u961f\u5747\u9700\u8d5b8\u573a\uff09\uff0c\u80dc\u4e00\u573a\u5f973\u5206\u3002\u5e73\u4e00\u573a\u5f971\u5206\uff0c\u8d1f\u4e00\u573a\u5f970\u5206\u3002\u8fd9\u6b21\u6bd4\u8d5b\u4e2d\uff0cA\u961f\u5e73\u7684\u573a\u6570\u662f\u6240\u8d1f\u573a\u6570\u76842\u500d\uff0c\u517117\u5206\uff0c\u8bd5\u95ee\u8be5\u961f\u80dc\u4e86\u51e0\u573a\uff1f
\u8bbe\u80dc\u4e86a\u573a\uff0c\u5e73\u7684\u573a\u6570\u662f2/3\uff088-a\uff09\uff0c\u8d1f\u7684\u573a\u6570\u662f\uff088-a\uff09/3
3a+2/3\uff088-a\uff09=17
9a+16-2a=51
7a=35
a=5
\u80dc\u4e865\u573a
25\u3001\u6211\u5e02\u8ba1\u5212\u6350\u4e663500\u518c\uff0c\u5b9e\u9645\u6350\u4e864125\u518c\u3002\u5176\u4e2d\u521d\u4e2d\u751f\u6350\u8d60\u4e86\u539f\u8ba1\u5212\u7684120%\uff0c\u9ad8\u4e2d\u751f\u6350\u8d60\u4e86\u539f\u8ba1\u5212\u7684115%\uff0c\u95ee\u521d\u4e2d\u751f\u548c\u9ad8\u4e2d\u751f\u6bd4\u539f\u8ba1\u5212\u591a\u6350\u4e86\u591a\u5c11\u4e66/
\u8bbe\u521d\u4e2d\u751f\u539f\u8ba1\u5212\u6350a\u672c\uff0c\u9ad8\u4e2d\u751f\u8ba1\u5212\u63503500-a
a\u00d7120%+(3500-a)\u00d7115%=4125
1.2a+4025-1.15a=4125
0.05a=100
a=2000\u672c
\u9ad8\u4e2d\u751f\u8ba1\u5212\u63503500-2000=1500\u672c
\u521d\u4e2d\u751f\u6bd4\u539f\u8ba1\u5212\u591a\u63502000\u00d7\uff08120%-1)=400\u672c
\u9ad8\u4e2d\u751f\u6bd4\u539f\u8ba1\u5212\u591a\u63501500\u00d7\uff08115%-1)=225\u672c
26\u3001\u5305\u88c5\u5382\u5de5\u4eba\u670942\u4eba\uff0c\u6bcf\u4eba\u6bcf\u5c0f\u65f6\u751f\u4ea7120\u4e2a\u5706\u5f62\u94c1\u7247\uff0c\u6216\u662f80\u4e2a\u957f\u65b9\u5f62\u94c1\u7247\uff0c\u5c06\u4e24\u4e2a\u5706\u5f62\u94c1\u7247\u548c\u4e00\u5f20\u957f\u65b9\u5f62\u94c1\u7247\u53ef\u914d\u5957\u6210\u4e00\u4e2a\u5bc6\u5c01\u5706\u6876\uff0c\u95ee\u5982\u4f55\u5b89\u6392\u5de5\u4eba\u751f\u4ea7\u5706\u5f62\u6216\u957f\u65b9\u5f62\u94c1\u7247\u80fd\u5408\u7406\u7684\u5c06\u94c1\u7247\u914d\u5957\uff1f
\u89e3\uff1a\u8bbe\u751f\u4ea7\u5706\u5f62\u94c1\u7247a\u4eba\uff0c\u957f\u65b9\u5f62\u94c1\u724742-a\u4eba
120a=2\u00d780\u00d7\uff0842-a\uff09
120a=6720-160a
280a=6720
a=24\u4eba
\u751f\u4ea7\u957f\u65b9\u5f62\u94c1\u724742-24=18\u4eba
27\u3001\u5546\u5bb6\u4e3a\u4e86\u4fc3\u9500\u67d0\u79cd\u5546\u54c1\uff0c\u5728\u73b0\u5728\u7684\u96f6\u552e\u4ef7\u7684\u57fa\u7840\u4e0a\u6253\u4e86\u4e03\u4e94\u6298\uff0c\u63a5\u7740\u53c8\u6253\u4e86\u516b\u6298\uff0c\u8fd9\u662f\u96f6\u552e\u4ef7\u4e3a360\u5143\uff0c\u6309\u8fd9\u4e00\u4ef7\u683c\u51fa\u552e\uff0c\u5546\u5e97\u8fd8\u670925%\u7684\u5229\u6da6\uff0c\u95ee\uff1a
\uff081\uff09\u5546\u54c1\u672a\u6253\u6298\u524d\u7684\u96f6\u552e\u4ef7\u662f\u591a\u5c11\uff1f
\uff082\uff09\u5546\u54c1\u7684\u8fdb\u4ef7\u662f\u591a\u5c11\uff1f
\uff083\uff09\u6309\u539f\u4ef7\u51fa\u552e\uff0c\u5229\u6da6\u7387\u4e3a\u591a\u5c11\uff1f
\u89e3\uff1a\u8bbe\u672a\u6253\u6298\u524d\u7684\u96f6\u552e\u4ef7\u4e3aa\u5143
\u6839\u636e\u9898\u610f
a\u00d70.75\u00d70.8=360
0.6a=360
a=600\u5143
\uff082\uff09\u8bbe\u8fdb\u4ef7\u4e3ab\u5143
\uff08360-b\uff09/b=25%
360-b=0.25b
1.25b=360
b=288\u5143
\uff083\uff09
\u539f\u4ef7\u51fa\u552e\uff0c\u5229\u6da6\u7387=\uff08600-288\uff09/288\u00d7100%\u2248108%
28\u3001\u7532\u6bcf\u9875\u6253500\u5b57\uff0c\u4e59\u6bcf\u9875\u6253600\u5b57\uff0c\u5df2\u77e5\u7532\u5b8c\u62108\u9875\uff0c\u4e59\u6070\u597d\u80fd\u5b8c\u62107\u9875\uff0c\u82e5\u7532\u6253\u5b8c2\u9875\u540e\uff0c\u4e59\u5f00\u59cb\u6253\u5b57\uff0c\u5f53\u7532\u3001\u4e59\u6253\u7684\u5b57\u6570\u76f8\u540c\u65f6\uff0c\u4e59\u6253\u591a\u5c11\u5b57\uff1f
\u89e3\uff1a\u53ef\u4ee5\u770b\u6210\u884c\u7a0b\u95ee\u9898\u91cc\u7684\u8ffd\u53ca\u95ee\u9898
\u76f8\u540c\u7684\u65f6\u95f4\u5185\u4e59\u6bd4\u7532\u5feb600\u00d77-500\u00d78=200\u5b57
\u7532\u6bd4\u4e59\u5148\u6253500\u00d72=1000\u5b57
\u5219\u5f53\u7532\u4e59\u6253\u5b57\u76f8\u540c\u65f6\uff0c\u4e59\u6253\u4e86\uff081000/200\uff09\u00d7600\u00d77=21000\u9875
\u65b9\u7a0b\uff1a\u8bbe\u4e59\u5927\u4e86a\u4e2a\u5b57
a/\uff08600\u00d77\uff09=\uff08a-500\u00d72\uff09/\uff08500\u00d78\uff09
4000a=4200a-4200000
200a=4200000
a=21000\u5b57
29\u3001\u67d0\u4e66\u5e97\u4e00\u5929\u5185\u9500\u552e\u7684\u7532\u4e59\u4e24\u79cd\u4e66\uff0c\u7532\u5171\u5356\u51fa1560\u5143\uff0c\u4e59\u5171\u5356\u51fa1350\u5143\u3002\u82e5\u6210\u672c\u5206\u5f00\u7b97\uff0c\u7532\u53ef\u83b7\u522925\uff05\uff0c\u4e59\u53ef\u4e8f\u672c10%\u3002\u8bd5\u95ee\u8be5\u4e66\u5e97\u4e00\u5929\u9500\u552e\u7532\u4e59\u4e24\u79cd\u4e66\u7c4d\u5171\u83b7\u5229\uff08\u4e8f\u672c\uff09\u591a\u5c11\u5143\uff1f
\u89e3\uff1a\u8bbe\u7532\u7684\u6210\u672c\u4e3aa\u5143
a\u00d7\uff081+25%\uff09=1560
a=1248\u5143
\u8bbe\u4e59\u7684\u6210\u672c\u4e3ab\u5143
b\u00d7\uff081-10%\uff09=1350
0.9b=1350
b=1500
\u603b\u6210\u672c=1248+1500=2748\u5143
\u4e00\u5171\u5356\u51fa1560+1350=2910\u5143
\u83b7\u5229=2910-2748=162\u5143
30\u3001\u7532\u4e59\u4e24\u4ef6\u670d\u88c5\u6210\u672c\u5171500\u5143\u3002\u5546\u5e97\u8001\u677f\u4e3a\u83b7\u5f97\u5229\u76ca\uff0c\u51b3\u5b9a\u5c06\u7532\u630950%\u7684\u5229\u6da6\u5b9a\u4ef7\uff0c\u5c06\u4e59\u630940%\u7684\u5229\u6da6\u5b9a\u4ef7\uff0c\u5b9e\u9645\u9500\u552e\u65f6\u4e3a\u6ee1\u8db3\u987e\u5ba2\u8981\u6c42\uff0c\u5747\u6309\u4e5d\u6298\u51fa\u552e\uff0c\u5171\u83b7\u5229157\u5143\uff0c\u8bd5\u95ee\uff0c\u7532\u4e59\u4e24\u4ef6\u670d\u88c5\u7684\u6210\u672c\u5404\u591a\u5c11\u5143\uff1f
\u89e3\uff1a\u8bbe\u7532\u7684\u6210\u672c\u4e3aa\u5143\uff0c\u5219\u4e59\u7684\u6210\u672c\u4e3a500-a\u5143
\u6839\u636e\u9898\u610f
[a\u00d7\uff081+50%\uff09+\uff08500-a\uff09\u00d7\uff081+40%\uff09]\u00d70.9-500=157
[1.5a+700-1.4a]\u00d70.9=657
0.1a=730-700
0.1a=30
a=300
\u7532\u7684\u6210\u672c300\u5143\uff0c\u4e59\u7684\u6210\u672c500-300=200\u5143
\u7bc7\u5e45\u9650\u5236\uff0c\u9700\u8981hi\u6211
\u7532\u4e59\u4e24\u6570\u7684\u548c\u662f32\uff0c\u7532\u6570\u76843\u500d\u4e0e\u4e59\u6570\u76845\u500d\u7684\u548c\u662f122\uff0c\u6c42\u7532\u3001\u4e59\u4e8c\u6570\u5404\u662f\u591a\u5c11\uff1f
\u89e3\uff1a\u8bbe\u7532\u6570\u4e3aX\uff0c\u4e59\u6570\u4e3a\uff0832\uff0dX\uff09\u3002
3X\uff0b\uff0832\uff0dX\uff09\u00d75=122
3X\uff0b160\uff0d5X=122
2X=38
X=19
32\uff0dX=32\uff0d19=13
\u7b54\uff1a\u7532\u6570\u662f19\uff0c\u4e59\u6570\u662f13\u3002
\u5f1f\u5f1f\u6709\u94b117\u5143\uff0c\u54e5\u54e5\u6709\u94b125\u5143\uff0c\u54e5\u54e5\u7ed9\u5f1f\u5f1f\u591a\u5c11\u5143\u540e\uff0c\u5f1f\u5f1f\u7684\u94b1\u662f\u54e5\u54e5\u76842\u500d\uff1f
\u89e3\uff1a\u8bbe\u54e5\u54e5\u7ed9\u5f1f\u5f1fX\u5143\u540e\uff0c\u5f1f\u5f1f\u7684\u94b1\u662f\u54e5\u54e5\u76842\u500d\u3002
\uff0825\uff0dX\uff09\u00d72=17\uff0bX
50\uff0d2X=17\uff0bX
3X=33
X=11
\u7b54\uff1a\u54e5\u54e5\u7ed9\u5f1f\u5f1f11\u5143\u540e\uff0c\u5f1f\u5f1f\u7684\u94b1\u662f\u54e5\u54e5\u76842\u500d\u3002
\u6709\u4e24\u6839\u7ef3\u5b50\uff0c\u957f\u7684\u6bd4\u77ed\u7684\u957f1\u500d\uff0c\u73b0\u5728\u628a\u6bcf\u6839\u7ef3\u5b50\u90fd\u526a\u63896\u5206\u7c73\uff0c\u90a3\u4e48\u957f\u7684\u4e00\u6839\u5c31\u6bd4\u77ed\u7684\u4e00\u6839\u957f\u4e24\u500d\u3002\u95ee\uff1a\u8fd9\u4e24\u6839\u7ef3\u5b50\u539f\u6765\u7684\u957f\u5404\u662f\u591a\u5c11\uff1f
1\uff0b1=2
1\uff0b2=3
\u89e3\uff1a\u8bbe\u539f\u6765\u77ed\u7ef3\u957fX\u5206\u7c73\uff0c\u957f\u7ef3\u957f2X\u5206\u7c73\u3002
\uff08X\uff0d6\uff09\u00d73=2X\uff0d6
3X\uff0d18=2X\uff0d6
X=12
2X=2\u00d712=24
\u7b54\uff1a\u539f\u6765\u77ed\u7ef3\u957f12\u5206\u7c73\uff0c\u957f\u7ef3\u957f24\u5206\u7c73\u3002
\u6709\u5927\u3001\u4e2d\u3001\u5c0f\u4e09\u7b50\u82f9\u679c\uff0c\u5c0f\u7b50\u88c5\u7684\u662f\u4e2d\u7b50\u7684\u4e00\u534a\uff0c\u4e2d\u7b50\u6bd4\u5927\u7b50\u5c11\u88c516\u5343\u514b\uff0c\u5927\u7b50\u88c5\u7684\u662f\u5c0f\u7b50\u76844\u500d\uff0c\u5927\u3001\u4e2d\u3001\u5c0f\u7b50\u5171\u6709\u82f9\u679c\u591a\u5c11\u5343\u514b\u3002
\u89e3\uff1a\u8bbe\u5c0f\u7b50\u88c5\u82f9\u679cX\u5343\u514b\u3002
4X=2X\uff0b16
2X=16
X=8
8\u00d72=16\uff08\u5343\u514b\uff09
8\u00d74=32\uff08\u5343\u514b\uff09
\u7b54\uff1a\u5c0f\u7b50\u88c5\u82f9\u679c8\u5343\u514b\uff0c\u4e2d\u7b50\u88c5\u82f9\u679c16\u5343\u514b\uff0c\u5927\u7b50\u88c5\u82f9\u679c32\u5343\u514b\u3002
30\u679a\u786c\u5e01\uff0c\u75312\u5206\u548c5\u5206\u7ec4\u6210\uff0c\u5171\u503c9\u89d29\u5206\uff0c\u4e24\u79cd\u786c\u5e01\u5404\u591a\u5c11\u679a\uff1f
9\u89d29\u5206=99\u5206
\u89e3\uff1a\u8bbe2\u5206\u786c\u5e01\u6709X\u679a\uff0c5\u5206\u786c\u5e01\u6709\uff0830\uff0dX\uff09\u679a\u3002
2X\uff0b5\u00d7\uff0830\uff0dX\uff09=99
2X\uff0b150\uff0d5X=99
3X=51
X=17
30\uff0dX=30\uff0d17=13
\u7b54\uff1a2\u5206\u786c\u5e01\u670917\u679a\uff0c5\u5206\u786c\u5e01\u670913\u679a\u3002
\u642c\u8fd0100\u53ea\u73bb\u7483\u74f6\uff0c\u89c4\u5b9a\u642c\u4e00\u53ea\u5f97\u642c\u8fd0\u8d393\u5206\uff0c\u4f46\u6253\u788e\u4e00\u53ea\u4e0d\u4f46\u4e0d\u5f97\u642c\u8fd0\u8d39\uff0c\u800c\u4e14\u8981\u8d545\u5206\uff0c\u8fd0\u5b8c\u540e\u5171\u5f97\u8fd0\u8d392.60\u5143\uff0c\u642c\u8fd0\u4e2d\u6253\u788e\u4e86\u51e0\u53ea\uff1f
2.60\u5143=260\u5206
\u89e3\uff1a\u8bbe\u642c\u8fd0\u4e2d\u6253\u788e\u4e86X\u53ea\u3002
3\u00d7\uff08100\uff0dX\uff09\uff0d5X=260
300\uff0d3X\uff0d5X=260
8X=40
X=5
\u7b54\uff1a\u642c\u8fd0\u4e2d\u6253\u788e\u4e865\u53ea\u3002
\u53c2\u52a0\u6821\u5b66\u751f\u8fd0\u52a8\u4f1a\u56e2\u4f53\u64cd\u8868\u6f14\u7684\u8fd0\u52a8\u5458\u6392\u6210\u4e00\u4e2a\u6b63\u65b9\u5f62\u961f\u5217\uff0c\u5982\u679c\u8981\u4f7f\u8fd9\u4e2a\u6b63\u65b9\u5f62\u961f\u5217\u51cf\u5c11\u4e00\u884c\u548c\u4e00\u5217\uff0c\u5219\u8981\u51cf\u5c1133\u4eba\uff0c\u53c2\u52a0\u56e2\u4f53\u64cd\u8868\u6f14\u7684\u8fd0\u52a8\u5458\u6709\u591a\u5c11\u4eba\uff1f
\u89e3\uff1a\u8bbe\u56e2\u4f53\u64cd\u539f\u6765\u6bcf\u884cX\u4eba\u3002
2X\uff0d1=33
2X=34
X=17
17\u00d717=289\uff08\u4eba\uff09
\u7b54\uff1a\u53c2\u52a0\u56e2\u4f53\u64cd\u8868\u6f14\u7684\u8fd0\u52a8\u5458\u6709289\u4eba\u3002
\u4eac\u534e\u5c0f\u5b66\u4e94\u5e74\u7ea7\u7684\u5b66\u751f\u91c7\u96c6\u6807\u672c\uff0c\u91c7\u96c6\u6606\u866b\u6807\u672c\u7684\u670925\u4eba\uff0c\u91c7\u96c6\u690d\u7269\u6807\u672c\u7684\u670919\u4eba\uff0c\u4e24\u79cd\u6807\u672c\u90fd\u91c7\u96c6\u7684\u67098\u4eba\uff0c\u5168\u73ed\u5b66\u751f\u5171\u670940\u4eba\uff0c\u6ca1\u6709\u91c7\u96c6\u6807\u672c\u7684\u6709\u591a\u5c11\u4eba\uff1f
\u89e3\uff1a\u8bbe\u6ca1\u6709\u91c7\u96c6\u6807\u672c\u7684\u6709X\u4eba\u3002
25\uff0b19\uff0d8\uff0bX=40
36\uff0bX=40
X=4
\u7b54\uff1a\u6ca1\u6709\u91c7\u96c6\u6807\u672c\u7684\u67094\u4eba\u3002
\u4e00\u4e2a\u56db\u4f4d\u6570\uff0c\u6700\u9ad8\u4f4d\u4e0a\u662f7\uff0c\u5982\u679c\u628a\u8fd9\u4e2a\u6570\u5b57\u8c03\u52a8\u5230\u6700\u540e\u4e00\u4f4d\uff0c\u5176\u4f59\u7684\u6570\u5b57\u4f9d\u6b21\u8fc1\u79fb\uff0c\u5219\u8fd9\u4e2a\u6570\u8981\u51cf\u5c11864\uff0c\u6c42\u8fd9\u56db\u4f4d\u6570\u3002
\u89e3\uff1a\u8bbe\u56db\u4f4d\u6570\u7684\u672b\u4e09\u4f4d\u4e3aX\u3002
7000\uff0bX=10X\uff0b7\uff0b864
9X=6129
X=681
7000\uff0b681=7681
\u7b54\uff1a\u8fd9\u56db\u4f4d\u6570\u662f7681\u3002
\u4e00\u8f86\u6c7d\u8f66\u4ece\u7532\u5730\u51fa\u53d1\u5230300\u5343\u7c73\u5916\u7684\u4e59\u5730\u53bb\uff0c\u5728\u4e00\u5f00\u59cb\u7684120\u5343\u7c73\u5185\u5e73\u5747\u901f\u5ea6\u4e3a\u6bcf\u5c0f\u65f640\u5343\u7c73\uff0c\u8981\u60f3\u4f7f\u8fd9\u8f86\u6c7d\u8f66\u4ece\u7532\u5730\u5230\u4e59\u5730\u7684\u5e73\u5747\u901f\u5ea6\u4e3a\u6bcf\u5c0f\u65f650\u5343\u7c73\uff0c\u5269\u4e0b\u7684\u8def\u7a0b\u5e94\u4ee5\u4ec0\u4e48\u901f\u5ea6\u884c\u9a76\uff1f
300\u00f750=6\uff08\u5c0f\u65f6\uff09
120\u00f740=3\uff08\u5c0f\u65f6\uff09
\u89e3\uff1a\u8bbe\u5269\u4e0b\u7684\u8def\u7a0b\u6bcf\u5c0f\u65f6\u884cX\u5343\u7c73\u3002
120\uff0b\uff086\uff0d3\uff09X=300
120\uff0b3X=300
3X=180
X=60
\u7b54\uff1a\u5269\u4e0b\u7684\u8def\u7a0b\u6bcf\u5c0f\u65f6\u884c60\u5343\u7c73\u3002
\u5c0f\u4e1c\u3001\u5c0f\u660e\u3001\u5c0f\u534e\u548c\u5b66\u6821\u5728\u4e00\u6761\u76f4\u9a6c\u8def\u4e0a\u7684\u540c\u4e00\u8fb9\u4e0a\u3002\u5c0f\u4e1c\u5bb6\u8ddd\u79bb\u5b66\u68211\u5343\u7c73\uff0c\u5c0f\u660e\u5bb6\u8ddd\u79bb\u5b66\u6821\u7684\u8ddd\u79bb\u4e3a\u5c0f\u4e1c\u5bb6\u8ddd\u79bb\u5b66\u6821\u7684110%\uff0c\u5c0f\u534e\u5bb6\u8ddd\u5b66\u6821\u7684\u8ddd\u79bb\u4e3a\u5c0f\u4e1c\u5bb6\u8ddd\u5b66\u6821\u76841.05\u500d\uff0c\u5c0f\u4e1c\u4e0e\u5c0f\u660e\u5bb6\u8ddd\u79bb\u591a\u5c11\u7c73\uff1f
\u89e3\uff1a\u5c0f\u660e\uff1a1+110%=1.1km
\u5c0f\u534e\uff1a1\u00d71.05=1.05km
\u7b2c\u4e00\u79cd\u60c5\u51b5\uff1a\u5c0f\u4e1c\u5c0f\u660e\u90fd\u5728\u5b66\u6821\u7684\u540c\u4e00\u8fb9
\u5219 \u5c0f\u4e1c\u4e0e\u5c0f\u660e\u5bb6\u8ddd\u79bb=1.1-1=0.1km
\u7b2c\u4e8c\u79cd\u60c5\u51b5\uff1a\u5c0f\u4e1c\u5c0f\u660e\u5728\u5b66\u6821\u7684\u4e24\u4fa7
\u5219 \u5c0f\u4e1c\u4e0e\u5c0f\u660e\u5bb6\u8ddd\u79bb=1+1.1=2.1km
\u7528\u94c1\u4e1d\u505a\u4e00\u4e2a\u68af\u5f62\u6846\u67b6\uff0c\u6846\u67b6\u7684\u4e24\u4e2a\u5e95\u89d2\u90fd\u76f8\u7b49\uff0c\u5982\u679c\u8981\u6c42\u4e0a\u5e95\u957f\u5341\u7c73\uff0c\u4e0b\u5e95\u662f\u4e0a\u5e95\u7684\u4e24\u500d\uff0c\u4e00\u8170\u957f13\u7c73\uff0c\u8fd9\u4e2a\u6846\u67b6\u81f3\u5c11\u9700\u8981\u94c1\u4e1d\u591a\u5c11\u7c73\uff1f
\u89e3\uff1a\u4e0a\u5e95\uff1a10 \u90a3\u4e48\u4e0b\u5e95\u5c31\u662f10*2=20 \u4e24\u6761\u8170\uff1a13*2=26
10+20+26=56\u7c73
\u7b54\uff1a\u8fd9\u4e2a\u6846\u67b6\u81f3\u5c11\u9700\u8981\u94c1\u4e1d56\u7c73\u3002
\u4e00\u79cd\u94a2\u7ba1\uff0c\u5185\u5706\u76f4\u5f84\u662f60\u5398\u7c73\uff0c\u5916\u5706\u76f4\u5f84\u662f80\u5398\u7c73\uff0c\u957f6\u7c73\uff0c\u4ed6\u7684\u4f53\u79ef\u662f\u591a\u5c11\uff1f
\u89e3\uff1aV=\u03c0\uff08R²-r²\uff09*L
=\u03c0\uff0840²-30²\uff09*600
=3.14*700*600
=1318800cm³
\u4e00\u4e2a\u5377\u70df\u5382\u4e0a\u534a\u5e74\u7684\u9500\u552e\u989d\u662f3000\u4e07\u5143\uff0c\u5982\u679c\u6309\u7167\u9500\u552e\u989d45\uff05\u7f34\u7eb3\u6d88\u8d39\u7a0e\uff0c\u4e0a\u534a\u5e74\u5e94\u7f34\u7eb3\u6d88\u8d39\u7a0e\u6b3e\u591a\u5c11\u4e07\u5143\uff1f
\u89e3\uff1a3000*45%=1350(\u4e07\u5143)
初一上册数学一元一次方程应用题演练http://wenku.baidu.com/view/9117276aaf1ffc4ffe47ac35.html
初一数学上册一元一次方程应用题100道问题补充
http://wenku.baidu.com/view/5c9b5d8d680203d8ce2f2485.html
初一数学一元一次方程应用题(提高)
http://wenku.baidu.com/link?url=vv16vptEDW9EVlOU1Bs3Sn-j9RmajZCYDbHJFyBDvJPJgQtzbzEi_uoVTeMZZPhdy46CIWOV57W7kI_W9TuiPQNFU3z7dD97WSgaWFbxL3_
绛旓細11銆佷竴涓垎鏁,濡傛灉鍒嗗瓙鍔涓123,鍒嗘瘝鍑忓幓163,閭d箞鏂板垎鏁扮害鍒嗗悗鏄3/4锛涘鏋滃垎瀛愬姞涓73,鍒嗘瘝鍔犱笂37,閭d箞鏂板垎鏁扮害鍒嗗悗鏄1/2,姹傚師鍒嗘暟.璁惧師鍒嗘暟鍒嗗瓙鍔犱笂123,鍒嗘瘝鍑忓幓163鍚庝负3a/4a 鏍规嵁棰樻剰 锛3a-123+73锛/锛4a+163+37锛=1/2 6a-100=4a+200 2a=300 a=150 ...
绛旓細1.瑙:璁捐繖绉嶆湇瑁呮瘡浠舵垚鏈槸x鍏.鐢遍鎰忓緱:(1+50%)*80%x=x+20 120%x=x+20 20%x=20 x=100 绛:杩欑鏈嶈姣忎欢鎴愭湰鏄100鍏.2.瑙:璁剧敺瀛︾敓鏈墄浜,鍒欏コ鐢熸湁(170-x)浜.鐢遍鎰忓緱:3x=7(170-x)3x=1190-7x 10x=1190 x=119 鍒(170-x)=170-119=51 绛:鐢峰鐢熸湁119浜,鍒欏コ鐢熸湁浜51浜...
绛旓細瑙锛氳鐢蹭箼涓ゅ湴璺濈鏄疿鍗冪背锛屼緷棰樻剰寰楋細X/(24+2)+X/(24-2)=6 瑙e緱锛歑=71.5(鍗冪背) 鐢插埌涔欓『娴佽埅琛屾墍鐢ㄦ椂闂达細X/(24+2)=71.5/26=2.75锛堝皬鏃讹級浠庝箼鍒扮敳閫嗘祦鑸鐢ㄧ殑鏃堕棿锛歑/(24-2)=71.5/22=3.25锛堝皬鏃讹級鍗充粠鐢插埌涔欓『娴佽埅琛屽拰浠庝箼鍒扮敳閫嗘祦鑸鍚勭敤浜2.75灏忔椂銆3.25灏忔椂鏃堕棿銆
绛旓細瑙o細鍥犱负s=1/2gt^2锛屽皢t=2锛宻=19.6甯﹀叆鍘鏂圭▼寰楋細19.6=1/2g脳4锛岃В寰梘=9.8锛屽綋t=3鏃讹紝灏唗=3锛実=9.8甯﹀叆鍘熸柟绋嬪緱锛歴=1/2脳9.8脳9=44.1锛屽嵆s=44.1銆傚叚銆佽窇寰楀揩鐨勯┈姣忓ぉ璧240閲岋紝璺戝緱鎱㈢殑椹瘡澶╄蛋150閲岋紝鎱㈤┈鍏堣蛋12澶╋紝蹇┈鍑犲ぉ鍙互杩涓鎱㈤┈锛熻В锛氳蹇┈x澶╄拷涓婃參椹...
绛旓細瑙f柟绋 1銆4(x-1)+2-2=2(4-x)-6 2銆1-2(2x-5)=3(3-x) 3銆(x-1)/3+1=(x+1)/2 4銆4x-3(20-x)=6x-7(9-x) 5銆5x-2=-7x+8 6銆11x-3=2x+3 7銆16=y/2+4 8銆(4-3x)/7+(5x-3)/14=-(2x+3)/28+(5x-1)/11 9銆乵x-2=3x+n(m!=3)...
绛旓細瑙o細璁句袱杞︾浉閬囩敤浜唜灏忔椂 15鍒嗛挓=0.25鏃 锛100-60锛*x+0.25*60=65 瑙e緱X=1.25 60*1.25+100*1.25+60*0.25=115(KM)绛旓細AB涓ゅ湴璺濈115KM銆傝В锛氳锛 鎸夊枃鍙椂姹借溅绂诲北璋风殑璺濈涓篨绫炽72鍗冪背/灏忔椂=20绫/绉 20脳4+340脳4=2X X=720 绛旓細鎸夊枃鍙椂姹借溅绂诲北璋风殑璺濈涓720绫炽傝...
绛旓細1銆佷粖骞存瘝濂充簩浜虹殑骞撮緞鍜屼负51宀侊紝8骞村墠姣嶄翰鐨勫勾榫勬槸濂冲効鐨6鍊嶏紝鍒欎粖骞存瘝浜茬殑骞撮緞涓?2銆佹煇鏍涓冨勾绾鍏辨湁65鍚嶅悓瀛﹀湪妞嶆爲鑺傛椿鍔ㄤ腑鎷呬换杩愬湡宸ヤ綔锛岀幇鏈45鏍规墎鎷咃紝璇蜂綘瀹夋帓涓涓嬫湁澶氬皯浜烘姮鍦燂紝澶氬皯浜烘寫鍦燂紝鍙娇鎵佹媴鍜屼汉鏁版伆濂界浉 閰嶏紵3銆佹煇鏍″噯澶囩粍缁囦竷骞寸骇瀛︾敓鍘荤娓革紝璁″垝绉熻嫢骞茶締鏃呮父杞︼紝鑻ョ鐢40搴х殑...
绛旓細璁鹃『椋庨鍑簒灏忔椂鍚庡線鍥為锛屽垯寰鍥為鐢紙5-X锛夊皬鏃讹紝寰杩旇窛绂荤浉绛 1500x=1000*锛5-x锛2500x=5000 x=2(灏忔椂锛
绛旓細5銆佸濮楁湁100鍏冮挶锛屽ス甯︾潃濡瑰鍘诲叕鍥父鐜╋紝濡瑰鍥犱负骞寸邯灏忥紝鎵浠ラ棬绁ㄨ垂鍑忓崐锛屼粯杩囬棬绁ㄨ垂浠ュ悗锛屽濮楄繕鏈55鍏冮挶锛屽濮楀拰濡瑰鐨勯棬绁ㄨ垂鍒嗗埆鏄灏戝厓锛6銆佹煇甯傜敱浜庡湴涓嬫按璧勬簮鏃ヨ秼绱у紶锛屼负榧撳姳甯傛皯鑺傛按锛屽鑷潵姘寸敤鎴锋寜濡備笅鏍囧噯鏀惰垂锛氳嫢姣忔埛姣忔湀鐢ㄦ按涓嶈秴杩6绔嬫柟绫筹紝姣忕珛鏂圭背鎸1.2鍏冩敹璐癸紱鑻ヨ秴杩6绔嬫柟绫筹紝鍒欒秴杩...
绛旓細鎵浠ュ師浠蜂负锛466-500*0.9锛壝0.8+500=16梅0.8+500=20+500=520鍏 鎵浠ヤ袱娆¤喘鐗╋紝鑻ヤ笉鎵撴姌锛屽硷細520+134=654鍏 2锛夎妭鐪侊細654-锛466+134锛=654-600=54鍏 3锛夎嫢鍚堣捣鏉ワ細鍙渶锛500*0.9+锛654-500锛*0.8=450+154*0.8=450+123.2=573.2鍏冿紲锛466+134锛夊厓 鎵浠ユ洿鑺傜渷 ...