一个房间长6米，宽4米，高3，如果在房间四壁贴墙纸，除去门窗7平米，每平米墙纸12元，共要多少钱墙
\u4e00\u4e2a\u623f\u95f4\uff0c\u957f6\u7c73\uff0c\u5bbd4\u7c73\uff0c\u9ad83\u7c73\u5982\u679c\u5728\u623f\u95f4\u56db\u58c1\u8d34\u58c1\u7eb8\uff0c\u9664\u53bb\u95e8\u7a977\u5e73\u65b9\u7c73\u3002\u6bcf\u5e73\u65b9\u7c73\u5899\u7eb812.5\u5143\uff0c\u5171\u9762\u79ef
2x(6+4)x3-7
=60-7
=53\u5e73\u65b9\u7c73
\u9700\u8981
53x12.5=662.5\u5143
\u8bf7\u597d\u8bc4
~\u5728\u6211\u56de\u7b54\u7684\u53f3\u4e0a\u89d2\u70b9\u51fb\u3010\u8bc4\u4ef7\u3011\uff0c\u7136\u540e\u5c31\u53ef\u4ee5\u9009\u62e9\u3010\u6ee1\u610f\uff0c\u95ee\u9898\u5df2\u7ecf\u5b8c\u7f8e\u89e3\u51b3\u3011\u4e86\u3002
\u5982\u679c\u4f60\u8ba4\u53ef\u6211\u7684\u56de\u7b54\uff0c\u656c\u8bf7\u53ca\u65f6\u91c7\u7eb3\uff0c
~\u4f60\u7684\u91c7\u7eb3\u662f\u6211\u524d\u8fdb\u7684\u52a8\u529b~~
［（6x3+4x3）x2-7］x12
=[30x2-7]x12
=636
绛旓細(6x3x2+3x4x2-7)x12.5=662.5鍏 瑙ｇ瓟瀹屾瘯 浣犲ソ锛岀櫨搴︿笓瀹剁粍寰堥珮鍏翠负浣犺В绛旓紝濡傛灉浣犺寰楁湁甯姪锛岃閲囩撼鍝︼紝璋㈣阿锛...
绛旓細濡傛灉涓嶈冭檻鎵ｉ櫎闂ㄧ獥鐨勯潰绉殑璇濓紝鍦扮爾闈㈢Н=6脳4+6脳3脳2+4脳3脳2=24+36+24=84骞筹紒
绛旓細杩欎釜寰堝ソ绠楀摝 6*4+6*3*2+4*3*2-7=77 77*0.15=11.55 1/3*11.55=3.85 (11.55+3.85)*(1+1/10)=16.94
绛旓細鑰屼笖浠栨瘡灏忔椂姣旂彮绾у璧1鍗绫筹紝閭ｄ箞浠栬璧朵笂鐝骇闇瑕2/1=2灏忔椂锛屼篃鍗筹紝浠栬蛋璺姳浜2灏忔椂锛屽彟澶栧彇鐢垫睜鑺变簡0.1灏忔椂锛屾棤璁烘槸鍙栫數姹犺繕鏄蛋璺紝鐝骇閮藉湪鍓嶈繘锛岃繖鏍风彮绾у墠杩涗簡锛2+0.1锛*4=8.4鍗冪背锛屾墍浠ユ诲叡璺▼鏄細8.4+1+1=10.4.鍗筹細1+[锛1*2锛/(5-4)+0.1]*4+1=10.4鍗冪背 ...
绛旓細6梅2=3 鎴块棿鐨勯暱閲岄潰鏈夊嚑涓湪绠辩殑闀垮害 3梅1=3 鎴块棿鐨勯珮閲岄潰鏈夊嚑涓湪绠辩殑楂樺害 4梅1=4 鎴块棿鐨勫閲岄潰鏈夊嚑涓湪绠辩殑瀹藉害 3脳3脳4=36涓 鎴块棿閲屽彲鏀36涓湪绠便
绛旓細涓涓埧闂撮暱6绫,瀹3.5绫,楂3绫,闂ㄧ獥闈㈢Н鏄8骞虫柟绫炽傜幇鍦ㄨ鎶婅繖涓埧闂寸殑鍥涚挧鍜屽眿椤剁矇姘存偿,绮夊埛姘存偿鐨勯潰绉槸澶氬皯骞虫柟绫?濡傛灉姣忓钩鏂圭背闇瑕佹按娉4鍗冨厠,閭ｄ箞涓鍏辫姘存偿澶氬皯鍗冨厠?... 涓涓埧闂撮暱6绫,瀹3.5绫,楂3绫,闂ㄧ獥闈㈢Н鏄8骞虫柟绫炽傜幇鍦ㄨ鎶婅繖涓埧闂寸殑鍥涚挧鍜屽眿椤剁矇姘存偿,绮夊埛姘存偿鐨勯潰绉槸澶氬皯骞虫柟绫?濡傛灉姣忓钩鏂圭背...
绛旓細4銆涓涓埧闂撮暱6绫,瀹4绫,楂3绫,濡傛灉鍦ㄦ埧闂村洓澹佽创澧欑焊,闄ゅ幓闂ㄧ獥7骞虫柟绫,姣忓钩鏂圭背澧欑焊12.5鍏,鍏辫澶氬皯鍏冪殑澧欑焊? 5銆佹湁涓夋牴閽笣,闀垮害鍒嗗埆鏄12绫炽18绫冲拰30绫,鐜板湪瑕佹妸瀹冧滑鎴垚闀垮害鐩稿悓鐨勫皬娈,浣嗘瘡涓鏍归兘涓嶈鍓╀綑,姣忓皬娈垫渶闀挎槸澶氬皯绫?涓鍏卞彲浠ユ埅鎴愬灏戞? 鏈洖绛旇鎻愰棶鑰呴噰绾 宸茶禐杩 宸茶俯杩< 浣犲...
绛旓細闇瑕佽绠5涓潰鐨勯潰绉紝鍗筹細6脳3.5+6脳3脳2+3.5脳3脳2-8=70骞虫柟绫 鍥犱负姣忓钩鏂圭背姘存偿4鍗冨厠锛屾墍浠ヤ竴鍏遍渶瑕70脳4=280鍗冨厠姘存偿
绛旓細瑙ｏ紝S=2x(6x3+3x4)+6x4=84 84-7=77 77x300=23100(鍏)=23.1骞插厠
