ÌâÄ¿ÄÚÈÝ
Ö»ÁÐʽ£¨»ò·½³Ì£©²»¼ÆË㣮
£¨1£©Ñ§Ð£ÉúÎïС×éÖÆ×÷À¥³æ±ê±¾ºÍÖ²Îï±ê±¾¹²65¼þ£¬ÖÆ×÷µÄÀ¥³æ±ê±¾ÊÇÖ²Îï±ê±¾µÄ4±¶£¬ÉúÎïС×éÖÆ×÷Ö²Îï±ê±¾¶àÉÙ¼þ£¿
£¨2£©Ð¡Áá¼Òµ½Ñ§Ð£µÄ·³ÌÊÇ1800Ã×£®Ëý´Ó¼Òµ½Ñ§Ð££¬ÒÑÐÐÁËÈ«³ÌµÄ
£¬ÕâʱСÁáÀë¼Ò¶àÉÙÃ×£¿
£¨3£©Ñ§Ð£½¨×ÛºÏÂ¥£¬Êµ¼ÊͶ×Ê100ÍòÔª£¬½ÚÔ¼ÁË20ÍòÔª£¬½ÚÔ¼ÁË°Ù·ÖÖ®¼¸£¿
£¨4£©Ò»ÖÖÒ½Óþƾ«£¬Óô¿¾Æ¾«ºÍË®°´3£º1ÅäÖƶø³É£¬ÏÖÓд¿¾Æ¾«45ǧ¿Ë£¬¿ÉÒÔÅäÖƶàÉÙǧ¿ËµÄÕâÖÖÒ½Óþƾ«£¿
£¨1£©Ñ§Ð£ÉúÎïС×éÖÆ×÷À¥³æ±ê±¾ºÍÖ²Îï±ê±¾¹²65¼þ£¬ÖÆ×÷µÄÀ¥³æ±ê±¾ÊÇÖ²Îï±ê±¾µÄ4±¶£¬ÉúÎïС×éÖÆ×÷Ö²Îï±ê±¾¶àÉÙ¼þ£¿
£¨2£©Ð¡Áá¼Òµ½Ñ§Ð£µÄ·³ÌÊÇ1800Ã×£®Ëý´Ó¼Òµ½Ñ§Ð££¬ÒÑÐÐÁËÈ«³ÌµÄ
7 |
9 |
£¨3£©Ñ§Ð£½¨×ÛºÏÂ¥£¬Êµ¼ÊͶ×Ê100ÍòÔª£¬½ÚÔ¼ÁË20ÍòÔª£¬½ÚÔ¼ÁË°Ù·ÖÖ®¼¸£¿
£¨4£©Ò»ÖÖÒ½Óþƾ«£¬Óô¿¾Æ¾«ºÍË®°´3£º1ÅäÖƶø³É£¬ÏÖÓд¿¾Æ¾«45ǧ¿Ë£¬¿ÉÒÔÅäÖƶàÉÙǧ¿ËµÄÕâÖÖÒ½Óþƾ«£¿
¿¼µã£ºÁз½³Ì½âÓ¦ÓÃÌ⣨Á½²½ÐèÒªÄæ˼¿¼£©,·ÖÊý³Ë·¨Ó¦ÓÃÌâ,°Ù·ÖÊýµÄʵ¼ÊÓ¦ÓÃ,±ÈµÄÓ¦ÓÃ
רÌ⣺¼òµ¥Ó¦ÓÃÌâºÍÒ»°ã¸´ºÏÓ¦ÓÃÌâ,·ÖÊý°Ù·ÖÊýÓ¦ÓÃÌâ,Áз½³Ì½âÓ¦ÓÃÌâ,±ÈºÍ±ÈÀýÓ¦ÓÃÌâ
·ÖÎö£º£¨1£©ÉèÉúÎïС×éÖÆ×÷Ö²Îï±ê±¾x¼þ£¬ÔòÀ¥³æ±ê±¾¾ÍÊÇ4x¼þ£¬¸ù¾ÝµÈÁ¿¹Øϵ£ºÖ²Îï±ê±¾¼þÊý+À¥³æ±ê±¾¼þÊý=65¼þ£¬Áгö·½³Ì½â¾öÎÊÌ⣻
£¨2£©Ëý´Ó¼Òµ½Ñ§Ð££¬ÒÑÐÐÁËÈ«³ÌµÄ
£¬ÒªÇóÕâʱСÁáÀë¼Ò¶àÉÙÃ×£¬Ò²¾ÍÊÇÇóÐÐÁ˶àÉÙÃ×£¬ÓÃ1800¡Á
½â´ð¼´¿É£»
£¨3£©ÏÈÓÃ100+20ÇóµÃ¼Æ»®Í¶×ʶàÉÙÍòÔª£¬ÓýÚÔ¼µÄ³ýÒԼƻ®Í¶×ʶµÃ½ÚÔ¼ÁË°Ù·ÖÖ®¼¸£»
£¨4£©Óô¿¾Æ¾«ºÍË®°´3£º1ÅäÖƶø³É£¬1+3=4£¬¼´´¿¾Æ¾«µÄÖØÁ¿ÊÇÅäÖƵÄÒ½Óþƾ«µÄÖØÁ¿µÄ
£¬Éè¿ÉÒÔÅäÖÆxǧ¿ËµÄÒ½Óþƾ«£¬Ôò¸ù¾ÝµÈÁ¿¹Øϵ£ºÅäÖƳɵÄÒ½Óþƾ«µÄÖØÁ¿¡Á
=´¿¾Æ¾«µÄÖØÁ¿£¬¾Ý´ËÁгö·½³Ì½â¾öÎÊÌ⣮
£¨2£©Ëý´Ó¼Òµ½Ñ§Ð££¬ÒÑÐÐÁËÈ«³ÌµÄ
7 |
9 |
7 |
9 |
£¨3£©ÏÈÓÃ100+20ÇóµÃ¼Æ»®Í¶×ʶàÉÙÍòÔª£¬ÓýÚÔ¼µÄ³ýÒԼƻ®Í¶×ʶµÃ½ÚÔ¼ÁË°Ù·ÖÖ®¼¸£»
£¨4£©Óô¿¾Æ¾«ºÍË®°´3£º1ÅäÖƶø³É£¬1+3=4£¬¼´´¿¾Æ¾«µÄÖØÁ¿ÊÇÅäÖƵÄÒ½Óþƾ«µÄÖØÁ¿µÄ
3 |
4 |
3 |
4 |
½â´ð£º
½â£º£¨1£©ÉèÉúÎïС×éÖÆ×÷Ö²Îï±ê±¾x¼þ£¬¸ù¾ÝÌâÒâ¿ÉµÃ·½³Ì£º
x+4x=65
5x=65
x=13
´ð£ºÖ²Îï±ê±¾13¼þ£®
£¨2£©1800¡Á
=1400£¨Ã×£©
´ð£ºÐ¡ÁáÕâʱÀë¼Ò1400Ã×£®
£¨3£©20¡Â£¨100+20£©
=20¡Â120
¡Ö16.7%
´ð£º½ÚÔ¼ÁË16.7%£®
£¨4£©Éè¿ÉÒÔÅäÖÆxǧ¿ËµÄÒ½Óþƾ«£¬¸ù¾ÝÌâÒâ¿ÉµÃ·½³Ì£º
x¡Á
=45
x=45
x=60
´ð£º¿ÉÒÔÅäÖÆ60ǧ¿ËµÄÒ½Óþƾ«£®
x+4x=65
5x=65
x=13
´ð£ºÖ²Îï±ê±¾13¼þ£®
£¨2£©1800¡Á
7 |
9 |
´ð£ºÐ¡ÁáÕâʱÀë¼Ò1400Ã×£®
£¨3£©20¡Â£¨100+20£©
=20¡Â120
¡Ö16.7%
´ð£º½ÚÔ¼ÁË16.7%£®
£¨4£©Éè¿ÉÒÔÅäÖÆxǧ¿ËµÄÒ½Óþƾ«£¬¸ù¾ÝÌâÒâ¿ÉµÃ·½³Ì£º
x¡Á
3 |
1+3 |
3 |
4 |
x=60
´ð£º¿ÉÒÔÅäÖÆ60ǧ¿ËµÄÒ½Óþƾ«£®
µãÆÀ£º½â¾öÕâÀàÎÊÌâÖ÷ÒªÕÒ³öÌâÀïÃæÔ̺¬µÄÊýÁ¿¹Øϵ£¬ÓÉ´ËÁгö·½³Ì½â¾öÎÊÌ⣮
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿