学校召开田径运动会甲乙丙三人接力,甲跑了4分之1,乙跑了70m,丙跑��
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\u5219\u4e09\u4eba\u901f\u5ea6\u6bd4\u662f 8:9:7
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甲跑了 300X1/4=75米 乙跑了70米 丙跑了300-75-70=155米
按这思路，就可以解了。只是你没告诉清楚接力什么
绛旓細=200 鍏ㄧ▼涓200绫
绛旓細鍋囧锛氭槸3X100鎺ュ姏 鎬婚噺鏄300 鐢茶窇浜 300X1/4=75绫 涔欒窇浜70绫 涓璺戜簡300-75-70=155绫 鎸夎繖鎬濊矾锛屽氨鍙互瑙ｄ簡銆傚彧鏄綘娌″憡璇夋竻妤氭帴鍔涗粈涔
绛旓細1-4鍒嗕箣涓-5鍒嗕箣浜=20 鍒嗕箣13 70闄や互20鍒嗕箣7=200m
绛旓細涓璺戜簡锛60x3/2=90绫 鍏ㄩ暱锛氾紙90+60锛壝凤紙1-25%锛=200绫
绛旓細浣犲ソ~~寰堥珮鍏翠负浣犳彁渚涙爣鍑嗚В绛攡~1-1/3-1/4=5/12 鈭涓璺戜簡鍏ㄧ▼鐨勫崄浜屽垎涔嬩簲 100梅5/12=240 鈭存帴鍔涜禌鍏ㄧ▼鍏240绫 甯屾湜鑳藉甯埌浣爚~璁板緱閲囩撼鍝~
绛旓細涓璺5/12 鐢叉瘮涓欏皯璺5/12-1/4=1/6 灏10绫 璺戦亾涓60绫 涔欒窇60/3=20绫
绛旓細鎶婁竴鍦堢殑闀跨湅鎴愬崟浣1锛岀敳銆佷箼銆涓鍒嗗埆璺戜簡1/4銆(1-1/4-1/3)銆1/3锛屽凡鐭ヤ笝姣旂敳澶氳窇10绫筹紝鎵浠 涓鍦堝叏闀夸负 10/(1/3-1/4)=120锛堢背锛変箼璺戜簡 120*(1-1/4-1/3)=50锛堢背锛
绛旓細50梅(1-1/4-1/3)=50梅5/12=120绫 璁惧叏绋媥 1/4x+1/3x+50=x x-3/12x-4/12x=50 5/12x=50 x=120
绛旓細涓鍏辫窇浜嗭細400梅10脳8=320锛堢背锛夛紱涔欐瘮涓欓鍏堬細360-320=40锛堢背锛夛紟绛旓細褰撶敳鍒扮粓鐐规椂锛屼箼姣斾笝棰嗗厛40绫筹紟锛2锛夊涓欑殑閫熷害鍔犱竴鍊嶏紝鍒欎笝鐨勯熷害鏄細8脳2=16锛涗笝鍒拌揪缁堢偣鏃讹紝涓欏張璺戜簡锛400-240=160锛堢背锛夛紱涓欒鎯冲緱绗竴鍚嶏紝涓欐渶灏戝拰鐢插悓鏃惰窇鍒扮粓鐐癸紝涔欏張璺戜簡锛160梅16脳9=90锛堢背锛夛紱涔欏叡...
绛旓細绛旀 1-1/4-1/3=5/12 50/(5/12)=120绫 x-1/4x-1/3x=505/12x=50x=120
