灏?
瀛?/p>
濂?/p>
鏁?/p>
鍑?/p>
浣?/p>
涓?/p>
棰?/p>
1
銆侊紙鈽呪槄锛夊鍥撅紝宸茬煡鍥涜竟褰?/p>
ABCD
涓紝
AB=13
锛?/p>
BC=3
锛?/p>
CD=4
锛?/p>
DA=12
锛屽苟涓?/p>
BD
涓?/p>
AD
鍨傜洿锛屽垯鍥涜竟褰㈢殑闈㈢Н绛?
浜庡灏戯紵
[
鎬?/p>
璺?/p>
]
锛氭樉鐒跺洓杈瑰舰
ABCD
鐨勯潰绉皢鐢变笁瑙掑舰
ABD
涓庝笁瑙掑舰
BCD
鐨勯潰绉眰鍜屽緱鍒帮紟涓夎褰?/p>
ABD
鏄洿瑙掍笁
瑙掑舰锛屽簳
AD
宸茬煡锛岄珮
BD
鏄湭鐭ョ殑锛屼絾鍙互閫氳繃鍕捐偂瀹氱悊姹傚嚭锛岃繘鑰屽彲浠ュ垽瀹氫笁瑙掑舰
BCD
鐨勫舰
鐘讹紝鐒跺悗姹傚叾闈㈢Н锛庤繖鏍风湅鏉ワ紝
BD
鐨勯暱搴︽槸姹傝В鏈鐨勫叧閿紟
瑙ｏ細鐢变簬
BD
鍨傜洿浜?/p>
AD
锛屾墍浠ヤ笁瑙掑舰
ABD
鏄洿瑙掍笁瑙掑舰锛庤�?/p>
AB=13
锛?/p>
DA=12
锛岀敱鍕捐偂瀹氱悊锛?/p>
BD
2
=AB
2
锛?
AD
2
=13
2
鈥?/p>
12
2
=25=5
2
锛屾墍浠?/p>
BD=5
锛庝笁瑙掑舰
BCD
涓?/p>
BD=5
锛?/p>
BC=3
锛?/p>
CD=4
锛屽張
3
2
鍗?/p>
4
2
=5
2
锛屾晠涓夎
褰?/p>
BCD
鏄互
BD
涓烘枩杈圭殑鐩磋涓夎褰紝
BC
涓?/p>
CD
鍨傜洿锛庨偅涔堬細
ABCD
S
鍥涜竟褰?/p>
=
ABD
S
飦?/p>
+
BCD
S
飦?/p>
=12
脳
5
梅
2+4
脳
3
梅
2=36
锛庯紟
鍗冲洓杈瑰舰
ABCD
鐨勯潰绉槸
36
锛?/p>
2
銆侊紙鈽呪槄锛夊鍥惧洓杈瑰舰鍦熷湴鐨勬�婚潰绉槸
48
骞虫柟绫筹紝涓夋潯绾挎妸瀹冨垎鎴愪簡
4
涓皬涓夎褰紝鍏朵腑
2
涓皬涓夎褰㈢殑闈?/p>
绉垎鍒槸
7
骞虫柟绫冲拰
9
骞虫柟绫筹紟閭ｄ箞鏈�澶х殑涓�涓笁瑙掑舰鐨勯潰绉槸
________
骞虫柟绫筹紱
[
鍒嗘瀽
]:
鍓╀笅涓や釜涓夎褰㈢殑闈㈢Н鍜屾槸
48-7-9=32
锛屾槸鍙充晶涓や釜涓夎褰㈤潰绉拰鐨?/p>
2
鍊嶏紝鏁呭乏渚т笁瑙掑舰闈㈢Н鏄?
鍙充晶瀵瑰簲涓夎褰㈤潰绉殑
2
鍊嶏紝鏈�澶т笁瑙掑舰闈㈢Н鏄?/p>
9
脳
2=18
銆?/p>
3
锛庯紙鈽呪槄锛夊皢涓嬪浘涓殑涓夎褰㈢焊鐗囨部铏氱嚎鎶樺彔寰楀埌鍙冲浘锛屽叾涓殑绮楀疄绾垮浘褰㈤潰绉笌鍘熶笁瑙掑舰闈㈢Н涔嬫瘮涓?/p>
2:3
銆?
宸茬煡鍙冲浘涓?/p>
3
涓槾褰辩殑涓夎褰㈤潰绉箣鍜屼负
1
锛岄偅涔堥噸鍙犻儴鍒嗙殑闈㈢Н涓哄灏戯紵
[
鎬?/p>
璺?/p>
]
锛氬皬鍗囧垵涓父鎶婂垎鏁帮紝鐧惧垎鏁帮紝姣斾緥闂澶勭悊鎴愪唤鏁伴棶棰橈紝杩欎釜鎬濇兂涓�瀹氳鍏绘垚銆?/p>
瑙ｏ細绮楃嚎闈㈢Н锛氶粍闈㈢Н
=2
锛?/p>
3
缁胯壊闈㈢Н鏄姌鍙犲悗鐨勯噸鍙犻儴鍒嗭紝鍑忓皯鐨勯儴鍒嗗氨鏄洜涓洪噸鍙犳墠鍙樺皯鐨勶紝杩欐牱鍙互璁炬�诲叡
3
浠斤紝鍚庢潵
绮楃嚎鍙?/p>
2
浠斤紝鍑忓皯鐨勭豢鑹查儴鍒嗕负
1
浠斤紝鎵�浠ラ槾褰遍儴鍒嗕负
2-1=1
浠斤紝
4
銆侊紙鈽呪槄锛夋眰涓嬪浘涓槾褰遍儴鍒嗙殑闈㈢Н锛?/p>
銆愯В銆戝宸︿笅鍥炬墍绀猴紝灏嗗乏涓嬭鐨勯槾褰遍儴鍒嗗垎涓轰袱閮ㄥ垎锛岀劧鍚庢寜鐓у彸涓嬪浘鎵�绀猴紝灏嗚繖涓ら儴鍒嗗垎鍒嫾琛ュ湪闃村奖浣?/p>
缃�傚彲浠ョ湅鍑猴紝鍘熼鍥剧殑闃村奖閮ㄥ垎绛変簬鍙充笅鍥句腑
AB
寮ф墍褰㈡垚鐨勫紦褰紝鍏堕潰绉瓑浜庢墖褰?/p>
OAB
涓庝笁瑙掑舰
OAB
鐨勯潰绉?/p>
涔嬪樊銆?/p>
鎵�浠ラ槾褰遍潰绉細
蟺
脳
4
脳
4
梅
4-4
脳
4
梅
2=4.56
銆?/p>
5
銆侊紙鈽呪槄锛変笅鍥句腑闃村奖閮ㄥ垎鐨勯潰绉槸澶氬皯鍘樼背
2
锛?/p>
7
9