15£®Ñ§Ð£½ÌÎñ´¦ÎªÁËÁ˽âѧÉúÏÂÎç²Î¼ÓÌåÓý»î¶¯µÄÇé¿ö£¬²ÉÓÃËæ»ú³éÑùµÄ·½Ê½½øÐÐÎʾíµ÷²é£¬µ÷²é½á¹û·ÖΪ¡°ÀºÇò¡±¡¢¡°×ãÇò¡±¡¢¡°Æ¹ÅÒÇò¡±¡¢¡°ÌøÉþ¡±¡°ÌåÓýÎ赸¡±¡¢¡°ÆäËû¡±ÁùÀ࣬·Ö±ðÓÃA¡¢B¡¢C¡¢D¡¢E¡¢F±íʾ£®¸ù¾Ýµ÷²é½á¹û»æÖÆÁËÈçͼËùʾÁ½·ù²»ÍêÕûµÄͳ¼Æͼ£®

½áºÏͼÖÐËù¸ø³öµÄÐÅÏ¢£¬Ç벹ȫÌõÐÎͳ¼Æͼ£¬²¢¸ù¾Ý³éÑùµ÷²é¹À¼ÆȫУ3600ÃûѧÉúÖÐÑ¡ÔñÌøÉþºÍÌåÓýÎ赸µÄ×ÜÈËÊý£®

·ÖÎö ¸ù¾ÝÌõÐÎͼºÍÉÈÐÎͼµÃµ½AµÄÈËÊýºÍÕ¼µÄ°Ù·Ö±È£¬Çó³öµ÷²éµÄÈËÊý£¬¼ÆË㻭ͼ¼´¿É£®

½â´ð ½â£ºÓÉÌõÐÎͼ¿ÉÖª£¬AµÄÈËÊýÊÇ15ÈË£¬
ÓÉÉÈÐÎͼ¿ÉÖªAÕ¼µÄ°Ù·Ö±ÈΪ£¬25%£¬
Ôòµ÷²éµÄÈËÊýΪ£º15¡Â25%=60£¬
CÕ¼µÄ°Ù·Ö±ÈΪ9¡Â60=15%£¬
EµÄÈËÊýΪ60¡Á10%=6ÈË£¬
FµÄÈËÊýΪ60¡Á10%=6ÈË£¬
DµÄÈËÊýΪ60-15-12-9-6-6=12ÈË£¬
²¹È«ÌõÐÎͳ¼ÆͼÈçͼ£º
ȫУ3600ÃûѧÉúÖÐÑ¡ÔñÌøÉþºÍÌåÓýÎ赸µÄ×ÜÈËÊýΪ£º3600¡Á$\frac{6+12}{60}$=1080ÈË£®

µãÆÀ ±¾Ì⿼²éµÄÊÇÌõÐÎͳ¼ÆͼºÍÉÈÐÎͳ¼ÆͼµÄ×ÛºÏÔËÓ㮶Á¶®Í³¼Æͼ£¬´Óͳ¼ÆͼÖеõ½±ØÒªµÄÐÅÏ¢Êǽâ¾öÎÊÌâµÄ¹Ø¼ü£®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ

20£®Èçͼ£¬°ëÔ²OÖУ¬ABΪֱ¾¶£¬AB=4£¬C¡¢DΪ°ëÔ²ÉÏÁ½µã£¬ËıßÐÎOACDΪÁâÐΣ¬Á¬½ÓBC½»ODÓÚµãE£¬ÔòÒõÓ°²¿·ÖÃæ»ýΪ$\frac{2}{3}$¦Ð-$\frac{\sqrt{3}}{2}$£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ

6£®ÏÈ»¯¼ò£¬ÔÙÇóÖµ£º$\frac{1}{3}$a[a-£¨-2b£©]-a£¨$\frac{1}{4}a+\frac{1}{3}b$£©£¬ÆäÖÐa=-2£¬b=3£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ

3£®ÀûÓÃÒ»Ãæǽ£¨Ç½µÄ³¤¶ÈΪ20m£©£¬ÁíÈý±ßÓó¤58mµÄÀé°ÊΧ³ÉÒ»¸öÃæ»ýΪ200m2µÄ¾ØÐγ¡µØ£®Çó¾ØÐγ¡µØµÄ¸÷±ß³¤£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ

10£®½âÏÂÁз½³Ì£º
£¨1£©$\frac{2}{x+2}$=$\frac{3}{x-2}$£»
£¨2£©2x=3-x2£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ

20£®ÔÚÒ»´ÎÊýѧ²âÊÔÖУ¬Ä³°à40ÃûѧÉúµÄ³É¼¨·ÖΪÁù×飬µÚÒ»×éµ½µÚËÄ×éµÄƵÊý·Ö±ðΪ6£¬9£¬5£¬10£¬µÚÎå×éƵÂÊÊÇ0.2£¬ÔòµÚÁù×éƵÊýÊÇ2£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ

7£®ÏÈ»¯¼ò£¬ÔÙÇóÖµ£º4£¨-3a2-ab£©-2£¨5ab-8b2£©£¬ÆäÖÐ$a=\frac{1}{2}$£¬b=-1£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ

4£®½«Á½¿éÈ«µÈµÄÖ±½ÇÈý½ÇÐÎֽƬ¡÷ABCºÍ¡÷DEFµþ·ÅÔÚÒ»Æð£¬ÆäÖСÏACB=¡ÏE=90¡ã£¬BC=DE=6£¬AC=FE=8£¬µãDÓë±ßABµÄÖеãÖغϣ¬½«¡÷DEFÈÆ×ŵãDÐýת£®
£¨1£©Èçͼ1£¬Èç¹û¡ÏEDFµÄ±ßDE¾­¹ýµãC£¬ÁíÒ»±ßDFÓë±ßAC½»ÓÚµãG£¬ÇóGCµÄ³¤£»
£¨2£©Èçͼ2£¬Èç¹û¡ÏEDFµÄ±ßDF¡¢DE·Ö±ð½»±ßBCÓÚµãM¡¢N£¬ÉèCN=x¡¢BM=y£¬Çóy¹ØÓÚxµÄº¯Êý½âÎöʽ£¬²¢ÇóËüµÄ¶¨ÒåÓò£»
£¨3£©Èçͼ3£¬Èç¹û¡ÏEDFµÄ±ßDF¡¢DE·Ö±ð½»±ßACÓÚµãM¡¢N£¬Èç¹û¡÷DMNÊǵÈÑüÈý½ÇÐΣ¬ÇóANµÄÖµ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º½â´ðÌâ

5£®Ä³Ð£¶Ô600ÃûѧÉú½øÐÐÁËÒ»´Î¡°ÐÄÀí½¡¿µ¡±ÖªÊ¶²âÊÔ£¬´ÓÖгéÈ¡Á˲¿·ÖѧÉú³É¼¨£¨µÃ·ÖÈ¡ÕýÕûÊý£¬Âú·ÖΪ100·Ö£©×÷ΪÑù±¾£¬»æÖÆÁËÏÂÃæÉÐδÍê³ÉµÄ±í¸ñºÍƵÊý·Ö²¼Ö±·½Í¼£¨×¡£ºÎÞ50.5ÒÔϳɼ¨£©
·Ö×éƵÊýƵÂÊ
50.5¡«60.520.04
60.5¡«70.580.16
70.5¡«80.510C
A¡«90.5B0.32
90.5¡«100.5140.28
ºÏ¼Æ
£¨1£©ÆµÊý·Ö²¼±íÖÐA=80.5£¬B=16£¬C=0.2£»
£¨2£©²¹È«ÆµÊý·Ö²¼Ö±·½Í¼£»
£¨3£©Èô³É¼¨ÔÚ90·ÖÒÔÉÏ£¨²»º¬90·Ö£©ÎªÓÅÐ㣬ÊÔ¹À¼Æ¸ÃУ³É¼¨ÓÅÐãµÄÓжàÉÙÈË£¿

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸