甲、乙两数的比是多少？
\u5df1\u77e5\u7532\u4e59\u4e24\u6570\u7684\u5e73\u5747\u6570\u662f45\uff0c\u7532\u3001\u4e59\u4e24\u6570\u7684\u6bd4\u662f7\u6bd43\uff0c\u6551\u7532\u4e59\u4e24\u6570\u5404\u662f\u591a\u5c11\uff1f\u7532\u4e59\u4e24\u6570\u7684\u603b\u548c\u5c31\u662f45*2=90\uff0c\u7532\u4e59\u6bd4\u662f7:3\uff0c\u5219\u603b\u4efd\u6570\u662f7+3=10\uff0c\u90a3\u6bcf\u4efd\u5c31\u662f9\uff0c\u6240\u4ee5\u7532\uff1a9*7=63\uff0c\u4e59\uff1a9*3=27
\u89e3\uff1a\u8bbe\u4e00\u4efd\u4e3aX\uff0c\u5219\u7532\u4e3a5X\uff0c\u4e59\u4e3a3X\u3002
5X+3X=75*2
8X=150
X=18.75
18.75*5=93.75
18.75*3=56.25
\u7b54\uff1a\u7532\u4e3a93.75\uff0c\u4e59\u4e3a56.25\u3002
\u671b\u91c7\u7eb3
甲：乙=6：5
6:5
绛旓細鍥炵瓟锛鐢叉暟姣斾箼鏁板1/5,鐢=涔(1+1/5) 鐢:涔=6:5
绛旓細鐢叉暟绛変簬350锛岄櫎浠7=50 涔欐暟绛変簬350锛岄櫎浠5=70 鎵浠ョ敳鏁伴櫎浠ヤ箼鏁扮瓑浜庯紝5姣7 瀹氫箟 鍔犳硶锛氭妸涓や釜鏁板悎骞舵垚涓涓暟鐨勮繍绠椼傚噺娉曪細鍦ㄥ凡鐭ヤ袱涓姞鏁扮殑鍜屼笌鍏朵腑鐨勪竴涓姞鏁帮紝姹傚彟涓涓姞鏁扮殑杩愮畻銆備箻娉曪細姹備袱涓暟涔樼Н鐨勮繍绠椼傞櫎娉曪細宸茬煡涓や釜鍥犳暟鐨勭Н涓庡叾涓殑涓涓洜鏁帮紝姹傚彟涓涓洜鏁扮殑杩愮畻銆
绛旓細鐢叉暟鍜屼箼鏁扮殑姣旀槸2锛3锛屼箼鏁板拰涓欐暟鐨勬瘮鏄4锛5锛岀敳鏁板拰涓欐暟鐨勬瘮鏄8锛15銆傛垜浠彲浠ュ厛鏍规嵁宸茬煡鏉′欢姹傚嚭鐢叉暟銆佷箼鏁板拰涓欐暟涔嬮棿鐨勬瘮渚嬪叧绯汇傚凡鐭ョ敳鏁板拰涔欐暟鐨勬瘮涓2锛3锛屽凡鐭ヤ箼鏁板拰涓欐暟鐨勬瘮涓4锛5銆傛牴鎹箼鏁=鐢叉暟脳姣斾緥绯绘暟锛屽彲璁＄畻鐢叉暟鍜屼箼鏁扮殑姣斾緥绯绘暟锛2/3=鐢叉暟/涔欐暟銆傛牴鎹笝鏁=涔欐暟脳...
绛旓細涔欐暟=72梅12=6锛岀敳鏁=120梅12=10锛岀敳涔欎箻绉=10脳6=60銆傝嚜鐒舵暟鏄竴鍒囩瓑浠锋湁闄愰泦鍚堝叡鍚岀壒寰佺殑鏍囪銆傛敞锛氭暣鏁板寘鎷嚜鐒舵暟锛屾墍浠ヨ嚜鐒舵暟涓瀹氭槸鏁存暟锛屼笖涓瀹氭槸闈炶礋鏁存暟銆備絾鐩稿噺鍜岀浉闄ょ殑缁撴灉鏈繀閮芥槸鑷劧鏁帮紝鎵浠ュ噺娉曞拰闄ゆ硶杩愮畻鍦ㄨ嚜鐒舵暟闆嗕腑骞朵笉鎬绘槸鎴愮珛鐨勩傜敤浠ヨ閲忎簨鐗╃殑浠舵暟鎴栬〃绀轰簨鐗╂搴忕殑鏁 銆 鍗...
绛旓細瑙ｏ細濡傛灉鐢叉暟=x 涔欐暟=kx 鐢叉暟涓庝箼鏁扮殑姣旀槸x锛歬x =1锛歬 涔欐暟涓庣敳鏁颁袱鏁扮殑鍜 =x+kx =x锛1+k锛=锛1+k锛墄
绛旓細鐢叉暟鍜涔欐暟鐨勬瘮鏄浜屾瘮涓変箼鏁板拰涓欐暟鐨勬瘮鏄洓姣斾簲鐢叉暟鍜屼笝鏁扮殑姣旀槸鍏瘮浜斻
绛旓細鐢叉暟鏄箼鏁扮殑2/3锛岀敳鏁颁笌涔欐暟鐨勬瘮鏄紙2:3锛夛紱鐢叉暟姣斾箼鏁板1/3锛岀敳鏁颁笌涔欐暟鐨勬瘮鏄紙4:3锛夈傛蹇 姣旀槸鐢变竴涓墠椤瑰拰涓涓悗椤圭粍鎴愮殑闄ゆ硶绠楀紡锛屽彧涓嶈繃鎶娾溍封濓紙闄ゅ彿锛夋敼鎴愪簡鈥:鈥濓紙姣斿彿锛夎屽凡锛屾槸闄ゆ硶鍙︿竴绉嶈〃鐜版柟寮忋備絾闄ゆ硶绠楀紡琛ㄧず鐨勬槸涓绉嶈繍绠楋紝鑰屾瘮鍒欒〃绀轰袱涓暟鐨勫叧绯汇傚拰鍒嗘暟鐨...
绛旓細8:15 瑙1:鐢诧細涔=2锛3=2脳4锛3脳4=8锛12 涔欙細涓=4锛5=4脳3锛5脳3=12锛15 鎵浠ョ敳锛氫箼锛氫笝=8锛12锛15 鎵浠ョ敳锛氫笝=8锛15 瑙2锛2锛3 = 8锛12锛岃4锛5 = 12锛15 鎵浠ヨ嫢璁鐢叉暟涓8x锛屽垯涔欐暟鍗充负12x锛岄偅涔堜笝鏁板氨鑷劧 鏄15x 鎵浠ョ敳鏁板拰涓鏁扮殑姣鍗充负8x锛15x = 8锛15銆
绛旓細鐢叉暟鍜屼笝鏁扮殑姣旀槸8锛15銆傚垎鏋愶細鎶涔欐暟鐪嬩綔鍗曚綅鈥1鈥濓紝鍒欑敳鏁版槸2/3锛屼笝鏁版槸5/4锛屾牴鎹瘮鐨勬剰涔夌敤鐢叉暟姣斾笂涓欐暟鍗冲彲銆傛棰樹富瑕佽冩煡姣旂殑鎰忎箟鐨勭悊瑙ｅ拰鐏垫椿搴旂敤锛屽叧閿槸鍏堢敤涔欐暟琛ㄧず鍑虹敳鏁板拰涓欐暟锛屼粠鑰岄棶棰樺緱瑙ｃ傜敳鏁帮細涓欐暟 =2/3锛5/4 =8锛15 鍏充簬鍋舵暟鍜屽鏁帮紝鏈変笅闈㈢殑鎬ц川锛氾紙1锛変袱涓繛缁...
绛旓細鐢叉暟鏄箼鏁扮殑5鍒嗕箣8锛屼箼鏁颁笌鐢叉暟鐨勬瘮鏄灏锛屽鏋滅敳涔欎袱鏁扮殑鍜屾槸78锛岄偅涔堢敳鏁版槸澶氬皯锛屼箼鏁鏄灏戯紵瑙ｏ細鐢诧細涔=5:8 鎵浠 涔欐暟锛氱敳鏁=8:5 浠庤 鐢叉暟=78梅锛8+5锛壝5=6脳5=30 涔欐暟=78梅锛8+5锛壝8=6脳8=48
