ÌâÄ¿ÄÚÈÝ

¡¾ÌâÄ¿¡¿Ò»¶Ô±íÏÖÐÍÕý³£µÄ·ò¸¾,ÆÞ×ÓȾɫÌåÕý³£,ÕÉ·òȾɫÌåÒì³£ÈçÏÂͼ1Ëùʾ:9ºÅȾɫÌåÓÐһƬ¶ÎÒ×λµ½7ºÅȾɫÌåÉÏ(7¡¢9±íʾÕý³£È¾É«Ìå,7+ºÍ9-·Ö±ð±íʾÒ쳣ȾɫÌå,¼õÊý·ÖÁÑʱ7Óë7+¡¢9ºÍ9-ÄÜÕý³£Áª»á¼°·ÖÀë)¡£Í¼2±íʾ¸Ã¼ÒÍ¥ÒÅ´«ÏµÆ×ͼ¼°È¾É«Ìå×é³É,ÏÂÁзÖÎöÕýÈ·µÄÊÇ( )

A. ¸Ã·ò¸¾ÉúÏÂÏàӦȾɫÌå×é³ÉÕý³£µÄ×Ó´ú¿ÉÄÜÐÔΪ1/2

B. ×Ó´úÏàӦȾɫÌå×é³ÉÓ븸Ç×¾ßÓÐÏàͬȱÏݵĿÉÄÜÐÔΪ1/8

C. ¸Ã³Õ´ô»¼ÕßÀ´×Ôº¬(7+¡¢9)µÄ¾«×Ӻͺ¬(7¡¢9)µÄÂÑϸ°ûµÄ½áºÏ

D. Èô¸¸Ç×µÄÒ»¾«×Óº¬(7+¡¢9),ÔòÀ´×Ôͬһ¾«Ô­Ï¸°ûµÄÈý¸ö¾«×ÓΪ(7+¡¢9-)¡¢(7¡¢9)¡¢(7¡¢9-)

¡¾´ð°¸¡¿C

¡¾½âÎö¡¿ÊÔÌâ·ÖÎö£ºÆÞ×ÓÖ»²úÉú1ÖÖÂÑϸ°û£º£¨7£¬9£©£¬ÕÉ·ò²úÉú4ÖÖ¾«×Ó1£¨7£¬9£©£º1(7+¡¢9)£º1£¨7,9-£©£º1(7+¡¢9-£©,¹Ê¸Ã·ò¸¾ÉúÏÂÏàӦȾɫÌå×é³ÉÕý³££¨77,99£©µÄ×Ó´ú¿ÉÄÜÐÔΪ1¨M4£¬¹ÊA´í¡£×Ó´úȾɫÌå×é³ÉΪ£¨77+¡¢99-£©¿ÉÄÜÐÔΪ1¨M4£¬¹ÊB´í¡£¸Ã³Õ´ô»¼ÕßȾɫÌå×é³ÉΪ£¨7+7,99£©£¬¹ÊCÕýÈ·¡£À´×Ôͬһ¸ö¾«Ô­Ï¸°ûµÄ4¸ö¾«×ÓÁ½Á½Ïàͬ£¬ÓÐ2ÖÖÀàÐÍ£º(7+¡¢9)ºÍ£¨7,9-£©£¬¹ÊD´í¡£

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø