小卖部要做一个长2米，宽0.4米，高0.8米的玻璃柜台各边都安上角铁，这个柜台需要多少米角铁？
\u5c0f\u5356\u90e8\u8981\u7ed9\u4e00\u4e2a\u957f2.2\u7c73\uff0c\u5bbd0.4\u7c73\u7684\u3001\u9ad80.8\u7c73\u7684\u73bb\u7483\u67dc\u53f0\u5404\u8fb9\u90fd\u5b89\u4e0a\u89d2\u94c1\uff0c\u8fd9\u4e2a\u67dc\u53f0\u9700\u8981\u591a\u5c11\u7c73\u7684\u89d22.2\u00d74\uff0b0.4\u00d74\uff0b0.8\u00d74=13.6\u7c73
1.\u89d2\u94c1=2.2\u00d74+0.4\u00d74+0.8\u00d74=13.6\u7c73
2.\u89d2\u94c1=4\u00d7(2.2+0.4+0.8)=13.6\u7c73
3.4\u00d7\u3010\u9ad8\uff0b\u5bbd\uff0b\u957f\u3011
4.\u6240\u5360\u7a7a\u95f4=2.2\u00d70.4\u00d70.8=0.704\u7acb\u65b9\u7c73
\u8fd9\u7684\u56de\u7b54\u6709\u8bb8\u591a\uff0c\u81ea\u5df1\u627e\u81ea\u5df1\u60f3\u8981\u7684\u7b54\u6848\u5427\u3002\u6709\u4e0d\u660e\u767d\u7684\u5730\u65b9\u518d\u95ee\u54df\uff0c\u795d\u4f60\u5b66\u4e60\u8fdb\u6b65\uff0c\u66f4\u4e0a\u4e00\u5c42\u697c\uff01 (*^__^*)
(2+0.4+0.8)×4=12.8
12.8
绛旓細40cm=0.4m 80cm=0.8m 锛0.4+0.8+2.2锛壝4=13.6锛坢锛夊鏋滃浣犳湁甯姪锛岃閲囩撼锛岃阿璋紒浣犵殑婊℃剰鏄垜鐨勫姩鍔涳紒
绛旓細瑙掗搧鎬婚暱灏辨槸杩欎釜闀挎柟浣12鏉℃１闀跨殑鎬诲拰銆傦紙2.2+0.4+0.8锛壝4锛3.4脳4锛13.6绫
绛旓細2.2脳4锛0.4脳4锛0.8脳4=13.6绫
绛旓細鏌滃彴椤堕潰闇瑕佽閾 锛2*2.2M(闀)+2*0.4M锛堝锛=5.2鏌滃彴4鏀灦闇鐢ㄨ閾侊細4*0.8M锛堥珮锛=3.2鏌滃彴鍦伴潰涓嶈瑙掗搧鐨勮瘽锛岀瓟妗堟槸5.2+3.2=8.4
绛旓細杩欎釜鏌滃彴闇瑕佽閾佺殑闀垮害=(2.2+0.4+0.8)脳4=3.4脳4=13.6(绫)
绛旓細瑙ｏ細40鍘樼背=0.4(绫)80鍘樼背=0.8(绫)杩欎釜鏌滃彴闇瑕佽閾佺殑闀垮害 =(2.2+0.4+0.8)脳4 =3.4脳4 =13.6(绫)
绛旓細2.2m=220cm 锛220+40+80锛墄4=1360cm 灏辨槸13.6m
绛旓細浣犲ソ锛岀敱浜庝綘鐨勯棶棰樹笉璇︾粏锛屾垜鍙ソ杩欐牱鍥炵瓟浜嗭細40cm=0.4m 80cm=0.8m 瑙掗搧=4脳(2.2+0.4+0.8)=13.6m鏈変笉鏄庣櫧鐨勫湴鏂瑰啀闂傜浣犲涔犺繘姝ワ紒
绛旓細6涓鐨勬婚暱锛屽氨鏄紙2.2+0.4+0.8锛*4=13.6绫
绛旓細40鍘樼背=0.4(绫)80鍘樼背=0.8(绫)杩欎釜鏌滃彴闇瑕佽閾佺殑闀垮害 =(2.2+0.4+0.8)脳4 =3.4脳4 =13.6(绫)
