谁会这道题：算式45÷9=5中，45是9
x*3/5+45=x*3/4+3\u8fd9\u9053\u9898\u600e\u4e48\u89e3\uff1f\u8be6\u7ec6\u7b97\u5f0f.\u628a\u542b\u6709\u672a\u77e5\u9879X\u7684\u79fb\u5230\u7b49\u53f7\u7684\u540c\u4e00\u8fb9\uff0c
x*3/5+45=x*3/4+3
x*3/5-x*3/4=3-45
-x*3/20=-42
x=280
\u8bbe\u8fd9\u4e2a\u73ed\u5973\u751fX\u4eba\uff0c\u5219\u7537\u751f\u4eba\u6570\u4e3aX*\uff081-20%\uff09
X+X*\uff081-20%\uff09=54
X=30
\u5373\u8fd9\u4e2a\u73ed\u7537\u751f24\u4eba\uff0c\u5973\u751f30\u4eba
3\uff1d3\u00d71
9\uff1d3\u00d73\uff1d3\u00d7(1\uff0b2)
18\uff1d3\u00d76\uff1d3\u00d7(1\uff0b2\uff0b3)
30\uff1d3\u00d710\uff1d3\u00d7(1\uff0b2\uff0b3\uff0b4)
45\uff1d3\u00d715\uff1d3\u00d7(1\uff0b2\uff0b3\uff0b4\uff0b5)
......
3\u00d7(1\uff0b2\uff0b3\uff0b...\uff0bn)
\uff1d3\u00d7n(n\uff0b1)/2
| 倍数；因数 |
绛旓細鍥炵瓟锛氬嶆暟;鍥犳暟
绛旓細鍥炵瓟锛(1)45梅9=5(杈);(2)45梅6=7(杈)鈥︹3(浜),闇瑕佺8杈
绛旓細鍊嶆暟锛涘洜鏁
绛旓細6x9=54锛岀湅鍊掍簡鐨勮瘽锛屽師鏁版槸45锛45梅9=5锛屾纭殑鍟嗗簲璇ユ槸5
绛旓細鏁板瓧鈥濓紝鍗崇敤涓閬绠楀紡浠ｆ浛鍙︿竴閬撶畻寮忎腑鐨勬煇涓暟瀛椼傝繖鏄缁冨垪缁煎悎绠楀紡鐨勫熀鏈柟娉曪紒鎵浠ユ湰棰樼洰涓涓涓殑璁＄畻缁撴灉鏄5锛岃岀浜屼釜绠楀紡涓殑涔樻暟涔熸槸5閭ｄ箞鐢ㄧ涓涓畻寮忎唬鏇跨浜屼釜绠楀紡涓殑鈥5鈥濓紝娉ㄦ剰浠ｆ浛鏁板瓧鐨勭畻寮忓繀椤荤敤鎷彿鎷捣鏉ワ紙鍥犱负杩欎釜瑕佸厛绠楋級锛45脳锛45梅9锛=45脳5 =225 ...
绛旓細45梅9=5琛ㄧず鎶婂嚑骞冲潎鍒嗘垚鍑犱唤锛屾瘡浠芥槸鍑狅紝杩樿〃绀哄嚑閲屾湁鍑犱釜鍑狅紝涔熻〃绀哄嚑鏄嚑鐨勫嚑鍊?45梅9=5琛ㄧず鎶婏紙45锛夊钩鍧囧垎鎴愶紙9锛変唤锛屾瘡浠芥槸锛5锛夛紝杩樿〃绀猴紙45锛夐噷闈㈡湁锛5锛変釜锛9锛夛紝涔熻〃绀45鏄紙9锛夌殑锛5锛夊嶃傚笇鏈涘浣犳湁甯姪锛
绛旓細灏忓浜屽勾绾ф暟瀛﹂45梅9=5锛岃繖涓紡瀛愯〃绀哄洓鍗佷簲閲岄潰鏈変簲涓節銆
绛旓細鏍规嵁45梅9=5,鎴戜滑灏辫锛45锛夋槸锛9鍜5锛夌殑鍊嶆暟,锛9鍜5锛夋槸锛45锛夌殑鍥犳暟銆
绛旓細缁煎悎绠楀紡9-45梅9 瑙ｉ鎬濊矾锛氬洓鍒欒繍绠楄鍒欙紙鎸夐『搴忚绠椼佸厛绠椾箻闄ゅ悗绠楀姞鍑忥紝鏈夋嫭鍙峰厛绠楁嫭鍙凤紝鏈変箻鏂瑰厛绠椾箻鏂癸級鍗宠劚寮忚繍绠楋紙閫掔瓑寮忚绠楋級闇鍦ㄨ鍘熷垯鍓嶆彁涓嬭繘琛 瑙ｉ杩囩▼锛=9-45梅9 =9-5 =4
绛旓細鍥炵瓟锛100-45梅9=45 涓夊勾绾х涓绔犲唴瀹,娣峰悎杩愮畻
