,13个铁皮烟囱长是九米宽和高都是三分米共用去多少平方米的铁皮? 有制作十二节长方体的铁皮烟囱,每节长二米宽四分米高三分米至少...
\u4e00\u79cd\u957f\u65b9\u4f53\u94c1\u76ae\u70df\u56f1,\u957f\u548c\u5bbd\u90fd\u662f3\u5206\u7c73,\u9ad84\u7c73,\u5236\u8fd9\u4e00\u8282\u70df\u56f1\u81f3\u5c11\u8981\u7528\u94c1\u76ae\u591a\u5c11\u5e73\u65b9\u7c73?3\u5206\u7c73=0.3\u7c73
0.3\u00d74\u00d74
=1.2\u00d74
=4.8\uff08\u5e73\u65b9\u7c73\uff09
\u7b54\uff1a\u5236\u8fd9\u6837\u4e00\u8282\u70df\u56f1\u81f3\u5c11\u8981\u7528\u94c1\u76ae4.8\u5e73\u65b9\u7c73
\u89e3\uff1a\u70df\u56f1\u662f\u6ca1\u6709\u4e0a\u4e0b\u5e95\u9762\u7684\uff0c\u56e0\u6b64\u53ea\u6c42\u4fa7\u9762\u79ef\u3002
\u7edf\u4e00\u5355\u4f4d\uff1a4\u5206\u7c73=0.4\u7c73 3\u5206\u7c73=0.3\u7c73
\u4e00\u8282\u70df\u56f1\u7684\u4fa7\u9762\u79ef\uff1a2*0.4*0.3=0.24\uff08\u5e73\u65b9\u7c73\uff09
12\u8282\u70df\u56f1\u7684\u4fa7\u9762\u79ef\uff1a0.24*12=2.88\uff08\u5e73\u65b9\u7c73\uff09
\u7b54\uff1a\u5236\u4f5c12\u8282\u8fd9\u6837\u7684\u957f\u65b9\u4f53\u70df\u56f1\uff0c\u81f3\u5c11\u9700\u89812.88\u5e73\u65b9\u7c73\u7684\u94c1\u76ae\u3002
\u3010\u89e3\u9898\u601d\u8def\u3011\uff1a\u628a\u9898\u4e2d\u95ee\u9898\u5148\u8f6c\u5316\u4e3a\u6570\u5b66\u6a21\u578b\uff0c\u5229\u7528\u6570\u5b66\u65b9\u6cd5\u8fdb\u884c\u6c42\u89e3\u3002
\u3010\u6ce8\u3011\uff1a\u505a\u9898\u65f6\u6ce8\u610f\u5148\u7edf\u4e00\u5355\u4f4d\uff0c\u7136\u540e\u518d\u8fdb\u884c\u6c42\u89e3\u3002
3分米=0.3米
0.3x4x9x13=140.4(平方米)
绛旓細瑕佺敤澶氬皯閾佺毊灏辫姹傚洓闈㈢殑闈㈢Н锛12鍘樼背=1.2鍒嗙背锛1.5绫崇瓑浜15鍒嗙背锛屽垪寮忎负 15x1.2x4x15 =18x4x15 =18x60 =1080锛堝钩鏂瑰垎绫筹級绛旇嚦灏戣閾佺毊1080骞虫柟鍒嗙背銆
绛旓細杩欓噷姹鐑熷洷锛瀹冩槸瑕侀氱儫鐨勶紝鎵浠ヤ袱涓潰鏄病鏈夌殑锛屽彧鏈4涓潰瑕佹眰銆傚氨鏄暱涔樹互瀹戒袱涓潰鍔犱笂闀夸箻浠ラ珮涓や釜闈傚彟澶栬娉ㄦ剰鍗曚綅鎹㈢畻锛岀粺涓鍗曚綅涓轰竴绫炽5鍒嗙背绛変簬闆剁偣5绫筹紝3鍒嗙背绛変簬闆剁偣3绫炽傛墍浠ヨ绠楄繃绋嬫槸 10x0.5脳2鍗10鈪0.3脳2=16骞虫柟绫炽傜瓟锛氳繖涓儫鍥卞叡闇瑕閾佺毊16骞虫柟绫炽
绛旓細鐑熷洷澶у閮芥槸鍦嗘煴褰㈢殑,鏍规嵁浣犵殑鎻忚堪,鐑熷洷鏄暱鏂逛綋,鎴戞寜闀挎柟浣撴潵绠.2绫=20鍒嗙背.姣忚妭鐨勮〃闈㈢Н=20脳锛4+3锛壝2=280骞虫柟鍒嗙背.280脳12=3360锛堝钩鏂瑰垎绫筹級=33.6骞虫柟绫 绛旓細鑷冲皯闇瑕33.6骞虫柟绫.
绛旓細閾佺毊=10脳2脳(2+3)脳4=400骞虫柟绫
绛旓細瑙e井鍒嗛棶棰樼殑鍩烘湰鎬濇兂绫讳技浜庤В浠f暟鏂圭▼锛岃鎶婇棶棰樹腑宸茬煡鍑芥暟鍜屾湭鐭ュ嚱鏁颁箣闂寸殑鍏崇郴鎵惧嚭鏉ワ紝杩涜屽緱鍒板寘鍚湭鐭ュ嚱鏁扮殑涓涓垨鍑犱釜鏂圭▼锛岀劧鍚庝娇鐢ㄥ垎鏋愮殑鏂规硶鍘绘眰寰楁湭鐭ュ嚱鏁扮殑琛ㄨ揪寮忋傚鏋滃井鍒嗘柟绋嬩腑鍑虹幇鐨勬湭鐭ュ嚱鏁板彧鍚竴涓嚜鍙橀噺锛岄偅涔堣绫诲井鍒嗘柟绋嬪氨鏄父寰垎鏂圭▼銆傚父寰垎鏂圭▼鐨勯氳В鏋勬垚涓涓嚱鏁版棌锛屼富瑕佺爺绌舵柟绋嬫垨...
绛旓細(3+4)脳2梅10脳2脳15=42(骞虫柟绫)鑷冲皯瑕佺敤42骞虫柟绫崇殑閾佺毊銆
绛旓細浣犲ソ锛佸簳闈㈤暱=10脳3/5=6绫 搴曢潰瀹=6梅1.5=4绫 鍔犻珮7 琛ㄩ潰绉=锛6脳4+6脳7+4脳7锛壝2 =锛24+42+28锛壝2 =94脳2 =188骞虫柟绫 濡傛灉瀵逛綘鏈夊府鍔╂湜鐐瑰彸涓婅鐨勯噰绾虫寜閽
绛旓細鏈夐暱銆佸銆侀珮锛岃繖搴旇鏄暱鏂逛綋鐨勭儫鍥便傚涓嬪浘锛屾妸瀹冪珛璧锋潵灏辨槸涓涓棤搴曢潰鏃犻《闈㈢殑鐑熷洷銆傜儫鍥辩殑鍛ㄩ暱C灏辨槸锛欳=2b+2c=2锛坆+c锛夌儫鍥辩殑琛ㄩ潰绉氨鏄繖涓珛璧锋潵鐨勬柟绛掔姸鐨勫睍寮鍥撅紙涓嶅惈搴曢潰鍜岄《闈級鐨勯潰绉紝闀垮害涓篴=10cm銆傛墍浠ワ紝杩欎釜閾佺毊鐑熷洷鐨勮〃闈㈢Н涓猴細S=a脳C=a脳2锛坆+c锛=10cm脳2锛4...
绛旓細1銆 涓鑺鐑熷洷鐨勫簳闈㈢洿寰勬槸 14cm锛岄暱鏄120cm銆傚仛50鑺傝繖鏍风殑鐑熷洷澶х害闇瑕佸灏戝钩鏂绫抽搧鐨锛燂紙寰楁暟淇濈暀鏁存暟锛2銆 鎶婁竴涓闀裤佸銆侀珮鍒嗗埆涓9cm銆7cm銆3cm鐨勯搧鍧楃啍閾告垚涓涓簳闈㈢洿寰勪负10cm鐨勫渾妞庡舰閾佸潡銆傚渾閿ョ殑楂樻槸澶氬皯鍘樼背锛3銆 涓涓渾鏌卞舰閾佺毊娌规《锛岄珮鏄10dm锛屽簳闈㈢洿寰涓庨珮鐨勬瘮鏄3锛5銆...
绛旓細4鍒嗙背=0.4绫 3鍒嗙背=0.3绫 锛0.4+0.3锛壝2脳2脳12 =2.8脳12 =33.6锛堝钩鏂圭背锛夊緢楂樺叴涓烘偍瑙g瓟!鏈変笉鏄庣櫧鐨勫彲浠ヨ拷闂紒濡傛灉鎮ㄨ鍙垜鐨勫洖绛斻傝鐐瑰嚮涓嬮潰鐨勩愰変负婊℃剰鍥炵瓟銆戞寜閽紝璋㈣阿锛