从甲堆煤取出五分之一放到乙堆，这时两堆煤重量相等。原来乙堆煤的重量比甲堆煤的重量少百分之几？ 从甲堆煤中，取出1/5给乙堆，这时两堆煤重量就相等了，原来乙...
\u4ece\u7532\u5806\u7164\u4e2d\uff0c\u53d6\u51fa15\u7ed9\u4e59\u5806\uff0c\u8fd9\u65f6\u4e24\u5806\u7164\u91cd\u91cf\u5c31\u76f8\u7b49\u4e86\uff0c\u539f\u6765\u4e59\u5806\u7164\u7684\u91cd\u91cf\u6bd4\u7532\u5806\u7164\u7684\u91cd\u91cf\u5c11\u767e\u5206\u4e4b\u51e0\uff1f\u662f5\u5206\u4e4b1\uff1f
\u89e3\uff1a\u8bbe\u7532\u5806\u539f\u6765\u4e3a1\uff0c\u7532\u5806\u53d6\u51fa1/5\uff0c\u5269\u4f59\u662f\u539f\u6765\u76841-1/5=4/5
1/5\u7ed9\u4e59\u5806\uff0c\u8fd9\u65f6\u4e24\u5806\u7164\u91cd\u91cf\u5c31\u76f8\u7b49\uff0c\u5219\u6b64\u65f6\u4e59\u5806\u4e5f\u662f\u7532\u5806\u539f\u6765\u76844/5
\u6240\u4ee5\u4e59\u961f\u539f\u6765\u91cd\u91cf\u662f\u7532\u5806\u539f\u6765\u7684\uff1a4/5-1/5=3/5
\u6240\u4ee5\uff1a\u539f\u6765\u4e59\u5806\u7164\u7684\u91cd\u91cf\u6bd4\u7532\u5806\u7164\u7684\u91cd\u91cf\u5c11\uff1a3/5-1=2/5
\u5c11\u767e\u5206\u6570\uff1a2/5\u00f71=2/5=40%
\u8bbe\u7532\u5806\u539f\u6765\u4e3a1\uff0c\u7532\u5806\u53d6\u51fa1/5\uff0c\u5269\u4f59\u662f\u539f\u6765\u76841-1/5=4/5
1/5\u7ed9\u4e59\u5806\uff0c\u8fd9\u65f6\u4e24\u5806\u7164\u91cd\u91cf\u5c31\u76f8\u7b49\uff0c\u5219\u6b64\u65f6\u4e59\u5806\u4e5f\u662f\u7532\u5806\u539f\u6765\u76844/5
\u6240\u4ee5\u4e59\u961f\u539f\u6765\u91cd\u91cf\u662f\u7532\u5806\u539f\u6765\u7684\uff1a4/5-1/5=3/5
\u6240\u4ee5\uff1a\u539f\u6765\u4e59\u5806\u7164\u7684\u91cd\u91cf\u6bd4\u7532\u5806\u7164\u7684\u91cd\u91cf\u5c11\uff1a3/5-1=2/5
\u5c11\u767e\u5206\u6570\uff1a2/5\u00f71=2/5=40%
设甲为X，已为Y，则X-（1/5）X＝Y+1/5X,解得Y/X＝3/5.即Y少X 2/5，所以已的种粮少甲的40％
40%
绛旓細浜斿垎涔嬩竴涔2闄や互1绛変簬40
绛旓細绛旓細鍘熸潵涔欏爢鐓鐨勯噸閲忔瘮鐢插爢鐓鐨勯噸閲忓皯40%锛
绛旓細浠庣敳鍫嗙叅涓彇鍑轰簲鍒嗕箣涓鏀惧叆涔欏爢锛岃繖鏃朵袱鍫嗙叅璐ㄩ噺鐩哥瓑锛屽垯 鐢-鐢瞂锛1/5)=涔+鐢瞂锛1/5)鐢瞂锛3/5)=涔 绛旓細鍘熸潵涔欏爢鐓ょ殑璐ㄩ噺鏄敳鍫嗙叅璐ㄩ噺鐨5鍒嗕箣3銆
绛旓細璁剧敳鍫嗙叅涓衡1鈥濓紝璋冨嚭5鍒嗕箣1鍚庝负璋冨嚭5鍒嗕箣4 璋冨嚭5鍒嗕箣1鍒颁箼鍫锛屼袱鍫嗙叅涓鏍峰锛屾墍浠涔欏爢鐓鏄5鍒嗕箣4-5鍒嗕箣1=5鍒嗕箣3 1-5鍒嗕箣3=5鍒嗕箣2 5鍒嗕箣2/1*100%=40 鍘熸潵涔欏爢姣旂敳鍫嗗皯40
绛旓細璁鐢插爢鍘熸潵涓1锛鐢插爢鍙栧嚭1/5锛屽墿浣欐槸鍘熸潵鐨1-1/5=4/51/5缁涔欏爢锛岃繖鏃朵袱鍫嗙叅閲嶉噺灏辩浉绛夛紝鍒欐鏃朵箼鍫嗕篃鏄敳鍫嗗師鏉ョ殑4/5 鎵浠ヤ箼闃熷師鏉ラ噸閲忔槸鐢插爢鍘熸潵鐨勶細4/5-1/5=3/5 鎵浠ワ紝鍘熸潵涔欏爢鐓ょ殑閲嶉噺姣旂敳鍫嗙叅鐨勯噸閲忓皯锛3/5-1=2/5 灏戠櫨鍒嗘暟锛2/5梅1=2/5=40 ...
绛旓細涓ゅ爢鐓ょ殑鍚ㄦ暟鐩哥瓑锛屽師鏉ョ敳 涔鐨勫惃鏁扮殑姣旀槸銆 銆慉.5:4 B.6:5 C 5:3 绛旀锛欳 5:3 瑙ｉ噴锛浠庣敳鍫嗙叅涓鍙栧嚭5鍒嗕箣1锛閭ｅ氨鏄1锛屽啀鍔犱笂涔欐哗鍘熸潵鐨3锛屾濂戒袱杈归兘鏄4銆傘 銆戯細銆 銆=[ ]梅75=澶氬皯鍒嗕箣18=0.36=銆 銆戙 9銆戯細銆25 銆=[27梅75=50鍒嗕箣18=0.36=36 ...
绛旓細涔欐槸鐢茬殑锛1-1/5脳2=3/5 鍒欏師鏉涔欏爢鐓ょ殑閲嶉噺鏄鐢插爢鐓鐨60
绛旓細杩欐椂涓ゅ爢鐓よ川閲忕浉绛夛紝鍘熸潵涔欏爢鐓ょ殑璐ㄩ噺鏄敳鍫嗙叅鐨勮川閲忕殑鐧惧垎涔嬪嚑锛熸妸鐢茬湅浣滃崟浣嶁1鈥濓紱浠庣敳鍫嗙叅涓鍙栧嚭5鍒嗕箣1缁欎箼鍫嗙叅锛岀敳鍓╀笅1-1/5=4/5锛岃繖鏃朵袱鍫嗙叅璐ㄩ噺鐩哥瓑锛涗篃灏辨槸涔欑幇鍦ㄤ篃鏄敳鐨4/5锛涢偅涔堬紝涔欏師鏉ユ槸鐢茬殑4/5-1/5=3/5锛涙墍浠ワ紝鍘熸潵涔欏爢鐓ょ殑璐ㄩ噺鏄敳鍫嗙叅鐨勮川閲忕殑3/5=0.6=60 ...
绛旓細鐢茬叅鍫嗙洰鍓嶄负1锛1/5锛4/5锛岀瓑浜庝箼鐓ゅ爢鐩墠鐨勮川閲忋備箼鐓ゅ爢鍘熸潵鐨勮川閲忓垯涓4/5锛堢敳鐓ゅ爢锛夛紞1/5锛堢敳鐓ゅ爢锛夛紳3/5锛堢敳鐓ゅ爢锛夈傜敳鐓ゅ爢鍘熸潵鐨勮川閲忎负1锛屼箼鐓ゅ爢鍘熸潵鐨勮川閲忔槸鐢茬叅鍫嗙殑3/5銆鐢蹭箼涓鍫嗙叅璐ㄩ噺鐨勬瘮鍊间负1:3/5锛5:3銆
绛旓細鐢插爢鐓鎷5鍒嗕箣1缁涔欏爢,杩欐椂涓ゅ爢鐓ら噸閲忕浉绛 琛ㄧず,鎶婄敳骞冲潎鍒嗘垚5浠,鎷1浠界粰涔,鍒欎箼鍘熸湁5-1-1=3浠.鍘熸潵涔欐瘮鐢插皯 锛5-3锛壝5 =2梅5 40
