ÎåÄê¼¶ÊýѧϲáÆÚÄ©²âÊÔ¾í£¨Ò»£©¹²ÆßÌ×ÊÔ¾í
°à¼¶___________ÐÕÃû___________
Ò»¡¢¿ÚËã¡£
12?13? 13?111314? 3?5? 16?2?
1?531517? 5?5? 9?739? 10?10?
23?19? 0.9¡Á7= 0.6+7= 1.25¡Á8= ¶þ¡¢Ìî¿Õ¡£
1.°Ñ42 ·Ö½âÖÊÒòÊýÊÇ£¨ £©¡£
2.ÄÜͬʱ±»2¡¢5¡¢3Õû³ýµÄ×îСÈýλÊýÊÇ£¨ £©¡£ 3.10 ÒÔÄÚÖÊÊýµÄ³Ë»ýÊÇ£¨ £©¡£
????864. 2=1=2=
??=??100=
??
5.´Ó1¡ª9 µÄ×ÔÈ»ÊýÖУ¬( £©ºÍ£¨ £©ÊÇÏàÁÚµÄÁ½¸öºÏÊý£»( ) ºÍ£¨ £©ÊÇÏàÁÚµÄÁ½¸ö
ÖÊÊý¡£
6.42µÄ×îСÒòÊýÊÇ£¨ ) £¬×î´óÒòÊýÊÇ£¨ ) £¬×îС±¶ÊýÊÇ( £©¡£ 7.°Ñ30 д³ÉÁ½¸öÖÊÊýµÄºÍ¡£ 30=( )+( )=( )+( )
8.18 ºÍ24 µÄ×î´ó¹«ÒòÊýÊÇ£¨ ) £¬×îС¹«±¶ÊýÊÇ£¨ £©¡£ 9.1.98L=( )ml=( )cm3
56ǧ¿Ë£½( £©¶Ö 45·Ö£½( £©Ê±
10.°ÑÈý¿éÀⳤ¶¼ÊÇ4cm µÄÕý·½Ìåľ¿éÆ´³ÉÒ»¸ö³¤·½Ì壬Õâ¸ö³¤·½ÌåµÄ±íÃæ»ý±ÈÔÀ´Èý¸ö
Õý·½ÌåµÄ±íÃæ»ý¼õÉÙÁË£¨ ) cm2 ¡£
11.Ò»¸öÕý·½Ìå½ÓÉÏÒ»¸öÍêÈ«ÏàµÈÕý·½Ìåºó£¬±íÃæ»ý±ÈÔÀ´Ôö¼ÓÁË60 ƽ·½ÀåÃ×£¬Õâ¸öÕý·½ÌåµÄ±íÃæ»ýÊÇ£¨ £©Æ½·½ÀåÃס£
Èý¡¢Ñ¡Ôñ¡££¨°ÑÕýÈ·´ð°¸µÄ×ÖĸÐòºÅÌîÔÚÀ¨ºÅÀ
1.ÔÚÏÂÃæ¸÷ʽÖУ¬³ýÊýÄÜÕû³ý±»³ýÊýµÄÊÇ£¨ £©¡£ A.12¡Â4 B.1¡Â3 C.2.5¡Â2.5 2.Óë
14ÏàµÈµÄ·ÖÊýÓУ¨ £©¡£ A.Ö»ÓÐÒ»¸ö B.Ö»ÓÐÁ½¸ö C.ÓÐÎÞÊý¸ö 3.Á½¸öÖÊÊýÏà³ËµÄ»ý£¨ £©¡£
A.Ò»¶¨ÊÇÖÊÊý B.Ò»¶¨ÊǺÏÊý C.¿ÉÄÜÊÇÖÊÊý£¬Ò²¿ÉÄÜÊǺÏÊý
ËÄ¡¢½â·½³Ì¡£
1316?x?3858 9?x?6
x?13?2377 8?x?12
Îå¡¢ÏÂÃæ¸÷Ì⣬ÔõÑùËã¼ò±ã¾ÍÔõÑùËã¡£
23?53125158?8?3 4?9?6?9
13?25?13216 4?5?3
45?310?433115 4?(8?4)
Áù¡¢½â¾öÎÊÌâ¡£
1.Ó×¶ùÔ°ÂòÀ´Ò»Ð©Ìǹû£¬µÚÒ»´Î³ÔÁËËüµÄ15£¬µÚ¶þ´Î±ÈµÚÒ»´ÎÉÙ³ÔÁËÕâЩÌǹûµÄ16£¬Á½´ÎÒ»¹²³ÔÁËÕâЩÌǹûµÄ¼¸·ÖÖ®¼¸£¿
2.Сºì°ïÂèÂè´òÒ»·Ý¸å¼þ£¬ÏÈ´òÁËÕâ·Ý¸å¼þµÄ14£¬ÓÖ´òÁËÕâ·Ý¸å¼þµÄ25¡£»¹Ê£Õâ·Ý¸å¼þµÄ
¼¸·ÖÖ®¼¸Ã»´ò£¿
3.ÓÃÌú˿Χ³É³¤¡¢¿í¡¢¸ß·Ö±ðÊÇ6 ·ÖÃס¢4 ·ÖÃס¢3 ·ÖÃ׵ij¤·½ÌåÄ£ÐÍÈý¸ö£¬ÖÁÉÙÐèÒª¶à
ÉÙ·ÖÃ×ÌúË¿£¿
4.ÔÚÒ»¼ä³¤4 Ãס¢¿í3 Ã׵İ칫ÊÒµØÃæÆÌÒ»²ãºñ3 ÀåÃ׵ĻìÄýÍÁ¡£ÐèÒª¶àÉÙÁ¢·½Ã׵ĻìÄýÍÁ£¿
5.Ò»¿é³¤·½ÌåʯÁÏ£¬Ìå»ýÊÇ64 Á¢·½·ÖÃ×£¬ÒÑ֪ʯÁϵij¤ÊÇ8·ÖÃ×£¬¿íÊÇ4 ·ÖÃס£Ê¯ÁϵÄ
¸ßÊǶàÉÙ·ÖÃ×£¿£¨Ó÷½³Ì½â£©
6.Ò»¸ö³¤·½Ìå¹ÞÍ·ºÐ£¬³¤6ÀåÃ×£¬¿í8ÀåÃ×£¬¸ß8ÀåÃס£ÔÚËüµÄËÄÖÜÌùÉÏһȦÉ̱êÖ½£¨½Ó
Í·´¦²»¼Æ£©£¬ÕâÕÅÉ̱êÖ½µÄÃæ»ýÖÁÉÙÓжàÉÙÆ½·½ÀåÃ×£¿
È˽̰æÎåÄê¼¶ÊýѧϲáÆÚÄ©²âÊÔ¾í£¨¶þ£©
Ò»¡¢Ìî¿Õ¡££¨25·Ö£©
1¡¢Ò»¸öÊý¼ÈÊÇ9µÄÒòÊý¡¢ÓÖÊÇ9µÄ±¶Êý£¬Õâ¸öÊýÊÇ£¨ £©¡£
2¡¢28µÄÒòÊýÓУ¨ £©£¬ÕâЩÊýÖУ¬ÖÊÊýÓУ¨ £©£¬ºÏÊýÓУ¨ £©£¬ÆæÊýÓУ¨ £©£¬Å¼ÊýÓУ¨ £©¡£
3¡¢Ò»¸öÕý·½ÌåµÄÀⳤÊÇ8ÀåÃ×£¬ËüµÄÀⳤ×ܺÍÊÇ£¨ £©ÀåÃ×£¬±íÃæ»ýÊÇ£¨ £©Æ½·½ÀåÃ×£¬Ìå»ýÊÇ£¨ £©Á¢·½ÀåÃס£
4¡¢8.5Éý =£¨ £©ºÁÉý 9.8ºÁÉý =£¨ £©Á¢·½ÀåÃ×
3.28Á¢·½Ã× =£¨ £©Éý 5¡¢
12???=3¡Â5==
?30=15¡Â£¨ £©=£¨ £©£¨´Ë¿ÕÌîСÊý£©
6¡¢0.36ÀïÃæÓÐ36¸ö£¨ £©£¬»¯³É×î¼ò·ÖÊýÊÇ£¨ £©¡£ 7¡¢7ºÍ9µÄ×î´ó¹«ÒòÊýÊÇ£¨ £©£¬×îС¹«±¶ÊýÊÇ£¨ £©¡£ 8¡¢·ÖĸÊÇ5µÄËùÓÐ×î¼òÕæ·ÖÊýµÄºÍÊÇ£¨ £©¡£
9¡¢ÓÐ5ƿάÉúËØ£¬ÆäÖÐһƿÉÙÁË4Ƭ¡£Èç¹ûÓÃÌìÆ½³Æ£¬ÖÁÉٳƣ¨ £©´Î¾ÍÄÜÕÒµ½ÉÙҩƬµÄÄÇÆ¿¡£
10¡¢ÔÚ9.5¡¢10.3¡¢9.5¡¢9.6¡¢9.4¡¢9.5¡¢10¡¢9.2¡¢9.5¡¢9.7Õâ×éÊýÖУ¬Æ½¾ùÊýÊÇ£¨ £©£¬ÖÚÊýÊÇ£¨ £©£¬ÖÐλÊýÊÇ£¨ £©¡£ ¶þ¡¢Åжϡ££¨6·Ö£©
1¡¢Ò»¸öºÏÊýÖÁÉÙÓÐ3¸öÒòÊý¡£¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤£¨ £© 2¡¢Á½¸öÊýµÄ×îС¹«±¶ÊýÒ»¶¨±ÈÕâÁ½¸öÊý¶¼´ó¡£¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤£¨ £© 3¡¢36¡Â9=4£¬ËùÒÔ36ÊDZ¶Êý£¬9ÊÇÒòÊý¡£¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤£¨ £© 4¡¢1Ã×µÄ
35ºÍ3Ã×µÄ15ÏàµÈ¡£¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤£¨ £© 5¡¢Ò»¸öÕý·½ÌåµÄÀⳤÊÇ6ÀåÃ×£¬ËüµÄ±íÃæ»ýºÍÌå»ýÏàµÈ¡£¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤£¨ £© 6¡¢ËùÓеÄżÊý¶¼ÊǺÏÊý¡£¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤ ¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤¡¤£¨ £© Èý¡¢Ñ¡Ôñ¡££¨6·Ö£©
1¡¢°Ñ
56µÄ·Ö×ÓÀ©´ó3±¶£¬ÒªÊ¹·ÖÊý²»±ä£¬Ôò£¨ £©¡£ A¡¢·Öĸ³ýÒÔ3 B¡¢·Öĸ²»±ä C¡¢·Öĸ³Ë3
2¡¢¼×8·ÖÖÓ×ö5¸öÁã¼þ£¬ÒÒ12·ÖÖÓ×ö7¸öÁã¼þ£¬±È½ÏÁ½È˵Ť×÷ËÙ¶È£¨ £©¡£
A¡¢¼×¿ìһЩ B¡¢ÒÒ¿ìһЩ C¡¢¼×¡¢ÒÒÒ»Ñù¿ì 3¡¢1Á¢·½·ÖÃ×µÄÕý·½Ìå¿ÉÒԷֳɣ¨ £©¸ö1Á¢·½ÀåÃ×µÄСÕý·½Ìå¡£ ¡¢1000 B¡¢100 C¡¢10
4¡¢Ò»¸öÀⳤÊÇ4cmµÄÕý·½Ì壬°ÑËü¾â³É3¸öÏàµÈµÄ³¤·½Ì壬±íÃæ»ýÔö¼ÓÁË£¨ £©cm2
¡£A¡¢16 B¡¢32 C¡¢64 5¡¢ÓÐÒòÊý3£¬Ò²ÊÇ2ºÍ5µÄ±¶ÊýµÄ×îСÈýλÊýÊÇ£¨ £©¡£
A¡¢100 B¡¢102 C¡¢120 6¡¢¼×ÊýÊÇÒÒÊýµÄ±¶Êý£¬¼×¡¢ÒÒÁ½ÊýµÄ×î´ó¹«ÒòÊýÊÇ£¨ £©¡£
A¡¢1 B¡¢ÒÒÊý C¡¢¼×Êý £¨28·Ö£©
1¡¢Ö±½Óд³öµÃÊý¡£(10·Ö)
13£«12= 65£45£«15= 1352472£«4= 6£3= 11£«11=
815671111349£«18= 12£«7£«12= 5£8= 9£«8= 3£7£7=
2¡¢¼ÆËãÏÂÃæ¸÷Ì⣬ÄܼòËãµÄÒª¼òËã¡££¨12·Ö£© 9£1411355£5 4+6+4+6 35££¨215+13£© 5127£3+ 7
3¡¢ÁÐʽ¼ÆËã¡££¨6·Ö£©
A ËÄ¡¢¼ÆËã¡£ £¨1£©´Ó1415Àï¼õÈ¥23Óë112µÄ²î£¬ £¨2£©¦ÖÓë38µÄºÍµÈÓÚ512£¬¦ÖÊǶàÉÙ£¿
½á¹ûÊǶàÉÙ£¿
Îå¡¢°´ÒªÇó×ö¡££¨13·Ö£©
1¡¢¼ÆËãÏÂÃæ³¤·½ÌåµÄ±íÃæ»ýºÍÌå»ý¡££¨µ¥Î»£ºÀåÃ×£©£¨4·Ö£© 4 8 5
2¡¢»³ö£¨Í¼Ò»£©ÈÆoµã˳ʱÕëÐýת90¶ÈºóµÄͼÐΡ££¨2·Ö£© Ò»³§
ÊýÁ¿/ÍòÔª ¶þ³§ 2000 2000 1500 1500 1000 1000 1125 500 1000
500 625
0 0 2004 2007 2009 2010 ʱ¼ä/Äê £¨Í¼Ò»£© £¨ ͼ¶þ£©
3¡¢¿´ÉÏÃæ£¨Í¼¶þ£©Í³¼ÆÍ¼»Ø´ðÎÊÌâ¡££¨ 7·Ö£© £¨1£©ÕâÊÇ£¨ £©Í³¼ÆÍ¼¡££¨1·Ö£©
£¨2£©¶þ³§2009ÄêµÄ²úÖµÊÇ2010Äê²úÖµµÄ¼¸·ÖÖ®¼¸£¿(×î¼ò·ÖÊý)£¨3·Ö£©
£¨3£©Ò»³§2007ÄêµÄ²úÖµÊÇ2010Äê²úÖµµÄ¼¸·ÖÖ®¼¸£¿(×î¼ò·ÖÊý)£¨3·Ö£©
Áù¡¢½â¾öÎÊÌâ¡££¨22·Ö£©
1¡¢ÓÐÒ»Õų¤·½ÐÎÖ½£¬³¤70ÀåÃ×£¬¿í50ÀåÃ×£¬Èç¹ûÒª¼ô³ÉÈô¸ÉͬÑù´óСµÄÕý·½ÐζøÃ»ÓÐÊ£Ó࣬¼ô³öµÄСÕý·½Ðεı߳¤×ÊǼ¸ÀåÃ×£¿£¨4·Ö£©
2¡¢Ò»¸ö³¤·½ÌåµÄ²£Á§¸×£¬³¤5dm¡¢¿í4dm¡¢¸ß4 dm£¬Ë®Éî3dm¡£Èç¹ûͶÈëÒ»¿éÀⳤΪ2dmµÄÕý·½ÌåÌú¿é£¬¸×ÀïµÄË®ÉÏÉý¶àÉÙdm£¿£¨5·Ö£©
3¡¢Ñ§Ð£Òª·ÛË¢½ÌÊÒ£¬ÒÑÖª½ÌÊҵij¤8Ã×£¬¿í6Ã×£¬¸ß3Ã×£¬ÃÅ´°Ãæ»ýÊÇ11.4ƽ·½Ã×£¬£¨µØ°å²»Ë¢£©¡£Èç¹ûÿƽ·½Ã×ÐèÒª»¨4ԪͿÁÏ·Ñ£¬·ÛË¢Õâ¸ö½ÌÊÒÒª»¨¶àÉÙÔª£¿£¨5·Ö£© 4¡¢Ï±íÊÇijУѧÉúϲ»¶µÄÌåÓýÔ˶¯µ÷²éͳ¼Æ±í£º
ϲ»¶µÄÌåÓýÔË×ãÇò ÀºÇò ƹÅÒÇò ÌøÉþ Ìßë¦×Ó ¶¯ Õ¼×ÜÈËÊýµÄ¼¸13131·ÖÖ®¼¸ 4 168 8 16 £¨1£©Ï²»¶ÈýÖÖÇòÀàÔ˶¯µÄÈËÊýÕ¼×ÜÈËÊýµÄ¼¸·ÖÖ®¼¸£¿£¨4·Ö£©
£¨2£©ÇëÄãÔÙÌá³öÒ»¸öÊýѧÎÊÌ⣬²¢½â´ð¡££¨4·Ö£©
È˽̰æÎåÄê¼¶ÊýѧϲáÆÚÄ©²âÊÔ¾í£¨Èý£©
Ò»¡¢ Ìî¿Õ£¨26·Ö£¬Ã¿¿Õ1·Ö£© 1¡¢ÔÚ£¨ £©ÀïÌîÉÏ·ÖÊý
25Ãë=£¨ £©·Ö 30ÀåÃ×=£¨ £©Ã× 250ǧ¿Ë=£¨ £©¶Ö 2¡¢£¨ £©¡Â8 =
1216 = 3
£¨ £©
= £¨ £©£¨ÌîСÊý£© 3¡¢ÔÚ¡ðÀïÌîÉÏ¡°£¾¡±¡¢¡°£¼¡±»ò¡°£½¡±
53¡ð54 78¡ð0.875 142¡ð7 4¡¢ºì²Ê´ø³¤8ÀåÃ×£¬À¶²Ê´ø³¤6ÀåÃ×£¬À¶²Ê´øÊǺì²Ê´øµÄ£¨ £©¡£ 5¡¢µ±x=1.5ʱ£¬0.75¡Âx ( )0.05¡££¨Ìî¡°£¾¡±¡¢¡°£¼¡±»ò¡°£½¡±£©
6¡¢Ð¡Ã÷ÔÚ½ÌÊÒÀïµÄλÖÃÓÃÊý¶Ô±íʾÊÇ(5£¬3) £¬Ëý×øÔÚµÚ£¨ £©Áеڣ¨ £©ÐС£
С·¼×øÔÚСÃ÷µÄÕýǰ·½£¬ÓÃÊý¶Ô±íʾËýµÄλÖÃÊÇ£¨ £¬ £©¡£
7¡¢38µÄ·Ö×Ó¼Ó3£¬ÒªÊ¹·ÖÊýµÄ´óС²»±ä£¬·ÖĸӦ¼Ó£¨ £©¡£
8¡¢Öܳ¤ÊÇ18.84ÀåÃ×µÄÔ²,ËüµÄÖ±¾¶ÊÇ( )ÀåÃ×,Ãæ»ýÊÇ( )ƽ·½ÀåÃס£
9¡¢·ÖÊýµ¥Î»ÊÇ 1
7
µÄ×î´óÕæ·ÖÊýÊÇ£¨ £©£¬×îС¼Ù·ÖÊýÊÇ£¨ £©£¬°ÑÕâ¸ö¼Ù·ÖÊý
ÔÙÌíÉÏ( )¸öÕâÑùµÄ·ÖÊýµ¥Î»¾ÍÊÇ×îСµÄËØÊý¡£
10¡¢°Ñ5ǧ¿ËµÄÒûÁÏÆ½¾ù·Ö¸ø8¸öͬѧºÈ£¬Ã¿È˺ȵÄÊÇ5ǧ¿ËµÄ£¨ £©£¨ £© £¬ÊÇ£¨ £©
£¨ £©
ǧ¿Ë¡£ 11¡¢×ÔÈ»ÊýaºÍbµÄ×î´ó¹«ÒòÊýÊÇ1£¬ÄÇaºÍbµÄ×îС¹«±¶ÊýÊÇ£¨ £©¡£ 12¡¢Óñ߳¤£¨Õû·ÖÃ×Êý£©£¨ £©·ÖÃס¢£¨ £©·ÖÃס¢£¨ £©·ÖÃ×µÄÕý·½Ðζ¼ ÄÜÕýºÃÆÌÂú³¤16·ÖÃס¢¿í12·ÖÃ׵ij¤·½ÐΡ£ ¶þ¡¢Åжϣ¨5·Ö£© 1¡¢µÈʽ²»Ò»¶¨ÊÇ·½³Ì£¬·½³ÌÒ»¶¨ÊǵÈʽ¡££¨ £© 2¡¢·ÖĸΪ8µÄ×î¼ò·ÖÊý¹²ÓÐ4¸ö¡££¨ £©
3¡¢ÓÃÔ²¹æ»Ô²£¬Ô²¹æÁ½½ÅÖ®¼äµÄ¾àÀëÊÇÔ²µÄÖ±¾¶¡£ £¨ £© 4¡¢1ǧ¿ËµÄ
34 ºÍ3ǧ¿ËµÄ14ÏàµÈ¡££¨ £© 5¡¢Ò»¸öÊýµÄÒòÊýÒ»¶¨±ÈËüµÄ±¶ÊýС¡££¨ £© Èý¡¢Ñ¡Ôñ£¨5·Ö£©
1¡¢5Ã׳¤µÄ»¨²¼×öÁË6ÌõͬÑù´óСµÄͯ¿ã£¬Ã¿Ìõͯ¿ãÓÃÕâ¿é²¼µÄ£¨ £©¡£ A¡¢56 Ã× B¡¢ 16 C¡¢120
2¡¢ÔÚÒ»¸ö³¤8·ÖÃ×£¬¿í6·ÖÃ׵ij¤·½ÐÎÖлһ¸ö×î´óµÄÔ²£¬Ô²µÄ°ë¾¶ÊÇ£¨ £©·ÖÃס£A£®8 B¡¢6 C¡¢3 3¡¢½ñÄê¡°¹úÇìÆßÈÕ³¤¼Ù¡±£¬Â½ÀÏʦÏë²Î¼Ó¡°Ç§µººþË«ÈÕÓΡ±£¬ÄÄÁ½ÌìÈ¥ÄØ£¬¹²ÓжàÉÙÖÖ²»Í¬µÄÑ¡Ôñ£¿( )
A¡¢5ÖÖ B¡¢6ÖÖ C¡¢4ÖÖ
4¡¢ÓұߵķÖÊýÖУº59 ¡¢ 37 ¡¢ 1224 ¡¢ 911 ¡¢13 ¡¢45 £¬ ±È 1
2 ´óµÄÓУ¨ £©¸ö
A¡¢3¸ö B¡¢4¸ö C¡¢2¸ö
5¡¢ÓÃÒ»Õų¤ÊÇ7·ÖÃ×£¬¿í3·ÖÃ׵ij¤·½Ðμô³öÒ»¸ö×î´óµÄÔ²£¬ÏñÕâÑùµÄÔ²×î¶à¿ÉÒÔ¼ô£¨ £©¸ö¡£
A¡¢2 B¡¢1 C¡¢ÎÞÊý¸ö ËÄ¡¢¼ÆË㣨33·Ö£© 1¡¢Ö±½ÓдµÃÊý£¨8·Ö£©
29£«59= 1£67= 35£«0.8= 7310£10=
5
8£14= 23£«11246= 0.2£8= 3£«9= 2 ¡¢½â·½³Ì£¨Ã¿Ð¡Ìâ3·Ö£¬¹²9·Ö¡££©
x£25 = 310 x£0.8x =22 2x +0.9¡Á3=24.7
3¡¢ÍÑʽ¼ÆË㣬ÄܼòËãµÄÒª¼òËã¡££¨Ã¿Ð¡Ìâ3·Ö£¬¹²12·Ö¡££©