È˽̰æÆßÄê¼¶Êýѧϲá8.1¶þÔªÒ»´Î·½³Ì×éÁ·Ï°¼°´ð°¸ ÏÂÔØ±¾ÎÄ

ÄÚÈÝ·¢²¼¸üÐÂʱ¼ä : 2026/3/16 8:12:26ÐÇÆÚÒ» ÏÂÃæÊÇÎÄÕµÄÈ«²¿ÄÚÈÝÇëÈÏÕæÔĶÁ¡£

8.1¶þÔªÒ»´Î·½³Ì×é¿ÎÌÃÁ·Ï°

Ò»£®Ìî¿ÕÌâ

1£®Èôx?y?4£¬x?

3

£¬Ôòy=_______________¡£ 2

2£®ÒÑÖªx?c?(5?c)2?0£¬Ôòx=_______________¡£

3£®°Ñ·½³Ì3x?2y?4Óú¬xµÄ´úÊýʽ±íʾy£¬Ôò¿ÉµÃµ½____________¡£

4£®Êý¶Ô??x?1£¬ÊǹØÓÚ×Öĸx£¬yµÄ¶þÔªÒ»´Î·½³Ì3x?ay?2µÄÒ»¸ö½â

?y??1Ôòa=__________________¡£

5£®¶þÔªÒ»´Î·½³Ì2y?3x?1£¬ÓÐ__________¸ö½â¡£ 6£®Èô2ax?y?2b2Óë?ab2x?1ÊÇͬÀàÏÔòx2?y2?_____________¡£

¶þ£®Ñ¡ÔñÌâ

1£®ÒÑÖª2x?y?1ÇÒ4x?z?5³ÉÁ¢£¬Ôò2y?zµÄֵΪ£¨ £© A¡¢3 B¡¢7 C¡¢£­3 D¡¢5 2£®ÏÂÁз½³Ì×éÖУ¬ÒÔ??x?2Ϊ½âµÄ·½³Ì×éÊÇ£¨ £©

?y?4?1?3x?2y??14?x?y?5A¡¢?2 B¡¢?

5x?y?6???2x?y?oC¡¢?

?9x?4y?3?x?y??2 D¡¢?

?3x?y?2?7x?2y?3Èý£¬½â´ðÌâ

1£®¼×¡¢ÒÒ¶þÈËͬʱ½â·½³Ì×é??ax?by?2?x?3¼×½â¶ÔÁË£¬µÃ?£¬ÒÒд

?mx?7y?8?y??2´íÁËm£¬µÃ??x??2£¬ÔòÔ­·½³Ì×éÖеÄa¡¢b¡¢m ·Ö±ðÊǶàÉÙ£¿

?y?22£®Èçͼ£¬8¿éÏàͬµÄ³¤·½ÐεØ×©Æ´³ÉÒ»¸ö³¤·½ÐΣ¬Ã¿¿é³¤·½ÐεØ×©µÄ³¤ºÍ¿í·Ö±ðÊǶàÉÙ£¿£¨8·Ö£©

¡ü60cm¡ý ²Î¿¼´ð°¸

Ò»£®1£®

54?3x 2£®5 3£®y? 4£®£­1 5£®ÎÞÊý 226£®0

¶þ£®

1 A 2 A Èý£®1£®½â£ºÓÉÌâÒâÖª£¬??x?3?x??2ÊÇ·½³Ì×éµÄ½â£¬¶ø?Ö»ÊÇ·½³Ìax?by?2µÄ½â

?y??2?y?2?3a?2b?2? ËùÒÔ µÃ?3m?14?8 ¡­¡­¡­¡­¡­¡­¡­¡­1·Ö

??2a?2b?2? ÓÉ¢ÚµÃm=£­2 ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­2·Ö

¢Ù+¢Û µÃa=4 ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­3·Ö °Ña=4´úÈë¢ÛµÃ?8?2b?2

b£½5¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­4·Ö

´ð£ºa=4£¬b=5£¬m=£­2 ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­£µ·Ö

?x?y?60 2£®½â£ºÉèÿ¿é³¤·½ÐεØ×©µÄ³¤Îªxcm,¿íΪycm,¸ù¾ÝÌâÒâµÃ?

x?3y?

½âµÃ??x?45 y?15?´ð£ºÃ¿¿é³¤·½ÐεØ×©µÄ³¤Îª45cm£¬¿íΪ15cm.