某公司挖了一条水渠，第一天挖了全长的五分之二，第二天挖了全长的八分之三，第三天挖了90米正好全部完 挖一条长7分之6千米的水渠，第一天挖了全长的5分之4，还剩下...
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绛旓細1.9+锛1.9-0.15锛+1.05=1.9+1.75+1.05=4.7锛堝崈绫筹級绛旓細杩欐潯姘存笭鍏ㄩ暱4.7鍗冪背锛
绛旓細濯掍綋 鏀垮簻 鍏朵粬缁勭粐 鍟嗗煄 鎵嬫満绛旈 鎴戠殑 鏌愬叕鍙告寲浜嗕竴鏉℃按娓,绗竴澶╂寲浜鍏ㄩ暱鐨勪簲鍒嗕箣浜,绗簩澶╂寲浜嗗叏闀跨殑鍏垎涔嬩笁,绗笁澶╂寲浜90绫虫濂藉叏閮ㄥ畬 鏌愬叕鍙告寲浜嗕竴鏉℃按娓,绗竴澶╂寲浜嗗叏闀跨殑浜斿垎涔嬩簩,绗簩澶╂寲浜嗗叏闀跨殑鍏垎涔嬩笁,绗笁澶╂寲浜90绫虫濂藉叏閮ㄥ畬鎴,杩欐潯姘存笭澶氶暱?... 鏌愬叕鍙告寲浜嗕竴鏉℃按娓,...
绛旓細鍏紡锛1-1/3=2/3 绗竴澶╂寲浜3/10,鎵浠ョ浜屽ぉ鎸栦簡鏄寲鐨勫叏闀垮噺鍘荤涓澶╃殑宸ヤ綔閲忎篃灏辨槸 2/3-3/10=11/30 鎵浠ョ浜屽ぉ淇簡11/30 鐢55梅11/30锛150(m)绛旓細姘存笭鍏ㄩ暱150m.涓嶆噦鍐嶉棶,
绛旓細1銆佺涓夊ぉ鎸栦簡=400-400脳(2/5)-400脳(1-2/5)脳(3/5)=400-160-144 =196绫筹紱2銆佷竴鍏=31梅(1-5/8-1/3)=31梅(9/24-8/24)=31脳24 =744浜猴紱澶=744脳(5/8-1/3)=744脳(15/24-8/24)=217浜 鎮ㄥソ锛屽緢楂樺叴涓烘偍瑙ｇ瓟锛宻kyhunter002涓烘偍绛旂枒瑙ｆ儜 濡傛灉鏈鏈変粈涔堜笉鏄庣櫧鍙互杩介棶锛...
绛旓細绗竴澶╂寲浜鍏ㄩ暱2/5锛屼篃灏辨槸400*2/5=160绫筹紝鍓╀綑240绫 绗簩澶╂寲浜嗗墿浣欑殑3/5锛屼篃灏辨槸240*3/5=144绫 绗笁澶╂寲瀹岋紝鎵浠ョ涓夊ぉ鎸栦簡400-160-144=96绫
绛旓細4鍙 1/3 闄や互 锛1-1/5-2/5锛=10鍙5/6 锛堢背锛夊叏闀 10鍙 5/6绫
绛旓細=7/8梅锛1-3/5-1/6锛=7/8梅7/30 =30/8 =3.75鍗冪背 姝ら闇娉ㄦ剰鈥滅浜屽ぉ鎸栦簡7/8鍗冪背鈥濊繖涓槸甯﹀崟浣嶇殑锛屼笉鏄瘮渚
绛旓細鎸涓鏉℃按娓狅紝绗竴澶╂寲浜鍏ㄩ暱鐨勪簲鍒嗕箣涓锛岀浜屽ぉ鎸栦簡3.5鍗冪背锛岃繕鍓╁叏鍦虹殑浜屽垎涔嬩竴娌℃寲锛岃繖鏉℃按娓犲叏闀垮灏戝崈绫筹紵3.5梅锛1-1/5-1/2锛=3.5梅3/10 =35/3 =11鍙2/3鍗冪背
绛旓細绗竴澶╂寲浜1/4锛岀浜屽ぉ鎸栦簡2/5锛岄偅涔堜袱澶╀竴鍏辨寲浜嗭紙1/4+2/5锛夛紳5/20+8/20锛13/20 鏍规嵁璁＄畻鐨勭粨鏋滐紝涓ゅぉ鎸栦簡鍏ㄩ暱鐨65锛咃紝鑰屼袱澶╂寲浜65绫筹紝鎵浠姘存笭鍏ㄩ暱100绫炽
绛旓細瑙ｏ細璁捐繖鏉℃按娓闀縜绫炽28%a+30%a=870 0.58a=870 a=1500 绛旓細杩欐潯姘存笭闀1500绫炽
