一个无盖的长方体水箱,长1.5m,宽0.5m,高1.2m.要在水箱的里面和外面涂上防锈漆,每平方米需用防锈漆0.25千克
\u4e00\u4e2a\u65e0\u76d6\u7684\u957f\u65b9\u4f53\u6c34\u7bb1\uff0c\u957f1.5m\u3001\u5bbd0.5m\u3001\u9ad81.2m\u3002\u8981\u5728\u6c34\u7bb1\u7684\u91cc\u9762\u548c\u5916\u9762\u6d82\u4e0a\u9632\u9508\u6f06,\u6bcf\u5e73\u65b9\u7c73\u9700\u7528\u9632\u9508\u6f060.25\u4f60\u9898\u76ee\u4e0d\u5b8c\u6574\u554a
5\u4e2a\u9762\u7684\u9762\u79ef\u4e582\uff0c\u5c31\u662f\u9700\u8981\u6d82\u6f06\u7684\u9762\u79ef
(1.5\u00d70.5+1.5\u00d71.2+0.5\u00d71.2\uff09\u00d72-1.5\u00d70.5
=3.15\u00d72-0.75
=6.3-0.75
=5.55\u5e73\u65b9\u7c73
\u6d82\u6f06\u9762\u79ef\uff1a5.55\u00d72=11.1\u5e73\u65b9\u7c73
\u7136\u540e\u9898\u76ee\u5e94\u8be5\u7ed9\u4e86\u6761\u4ef6\uff0c\u6bcf\u5e73\u65b9\u7c73\u7528\u591a\u5c11\u6f06\uff0c
\u7136\u540e\u7ed9\u51fa\u6bcf\u5347\u6f06\u91cd\u591a\u5c11
\u4e58\u4e00\u4e0b\u5c31\u884c\u4e86
\uff081.5*1.2+1.2*0.5\uff09*2+1.5*0.5=5.55\uff08\u5e73\u65b9\u7c73\uff09
5.55*0.75=4.16\uff08\u7ea6\u7b49\u4e8e\u540e\uff09\uff08\u5343\u514b\uff09
\u6ce8\uff1a*=\u4e58\u53f7
防锈漆=2*5.55*0.25≈2.78千克
1.5*0.5+[（1.2*0.5+1.2*1.5）X2]=5.55KG
5.55*0.25=1.3875≈1.39KG
答：涂漆1.39KG
(1.5×0.5+1.5×1.2+0.5×1.2）×2-1.5×0.5
=3.15×2-0.75
=6.3-0.75
=5.55平方米
涂漆面积：5.55×2=11.1平方米
11.1乘0.75等于8.325 然后让保留两位小数 就是8.325千克≈8.33千克 望采纳 赞同
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（1.5*1.2+0.5*1.2）*2+1.5*0.5*0.25=4.98759（kg)?
ahdshrehatgr
绛旓細闈㈢Н=1.5*0.5+2*1.5*1.2+2*0.5*1.2=5.55骞虫柟绫 闃查攬婕=2*5.55*0.25鈮2.78鍗冨厠
绛旓細闈㈢Н=1.5脳0.5+2脳(1.5+0.5)脳1.2=5.55骞虫柟绫 涓鍏=5.55脳0.25脳2=2.775鍗冨厠
绛旓細闇瑕 锛1.5x0.5+2x1.5x1.2+2x0.5x1.2锛墄2 =锛0.75+3.6+1.2锛墄2 =5.55x2 =11.1骞虫柟绫
绛旓細(1.5脳0.5+1.5脳1.2+0.5脳1.2锛壝2-1.5脳0.5 =3.15脳2-0.75 =6.3-0.75 =5.55骞虫柟绫 娑傛紗闈㈢Н锛5.55脳2=11.1骞虫柟绫 鐒跺悗棰樼洰搴旇缁欎簡鏉′欢锛屾瘡骞虫柟绫崇敤澶氬皯婕嗭紝鐒跺悗缁欏嚭姣忓崌婕嗛噸澶氬皯 涔樹竴涓嬪氨琛屼簡
绛旓細涓涓棤鐩栫殑闀挎柟浣閾佺毊姘寸闀1.5鍒嗗4鍒嗙背楂0.5绫崇背鏈澶氱洓澶氬皯鍗 涓涓棤鐩栫殑闀挎柟浣撻搧鐨按绠遍暱1.5鍒嗗4鍒嗙背楂0.5绫崇背鏈澶氱洓澶氬皯鍗 涓涓棤鐩栫殑闀挎柟浣撻搧鐨按绠遍暱1.5鍒嗗4鍒嗙背楂0.5绫崇背鏈澶氱洓澶氬皯鍗 涓涓棤鐩栫殑闀挎柟浣撻搧鐨按绠遍暱1.5鍒嗗4鍒嗙背楂0.5绫崇背鏈澶氱洓澶氬皯鍗 涓涓棤鐩栫殑闀挎柟浣撻搧鐨...
绛旓細涓涓棤鐩楸肩几鏈5涓潰锛氬洓鍛ㄥ拰搴.鍥涘懆鏈闀1.5绫炽侀珮1绫崇殑2鍧,瀹0.4绫炽侀珮1绫崇殑2鍧,搴曟槸闀1.5绫炽佸0.4绫崇殑1鍧,闈㈢Н鏄細1.5脳1脳2+0.4脳1脳2+1.5脳0.4=4.4骞虫柟绫
绛旓細闈㈢Н=1.5脳0.5+2脳(1.5+0.5)脳1.2=5.55骞虫柟绫 涓鍏=5.55脳0.25脳2=2.775鍗冨厠
绛旓細9鍘樼背=0.9鍒嗙背锛1.5脳1.2+1.5脳0.9脳2+1.2脳0.9脳2=1.8+2.7+2.16=6.66锛堝钩鏂瑰垎绫筹級锛1.5脳1.2脳0.9=1.62锛堢珛鏂瑰垎绫筹級锛1.62绔嬫柟鍒嗙背=1.62鍗囷紱绛旓細娑傛紗閮ㄥ垎鐨勯潰绉槸6.66骞虫柟鍒嗙背锛岃繖涓洅瀛愯兘瑁1.62鍗囨按锛
绛旓細姘寸鎬诲叡浜斿悇闈紝涓嬪簳闈㈠拰鍓嶅悗闈㈤潰绉竴鏍枫傝〃闈㈢Н涓簊=0.8脳0.8脳2+0.8脳1.5脳3=4.88骞虫柟绫 鑷冲皯闇瑕4.88骞虫柟绫抽搧鐨
绛旓細瑙ｏ細瑕佸埗浣涓涓棤鐩栫殑闀挎柟浣楸肩几锛岄鍏堥渶瑕佽绠楀嚭鎵闇鐨勭幓鐠冮潰绉傞奔缂哥殑灏哄涓闀1.5绫筹紝瀹0.5绫筹紝楂0.8绫炽傜敱浜庨奔缂告棤鐩栵紝鎴戜滑鍙渶瑕佽绠椾簲涓潰鐨勬婚潰绉1. 搴曢潰绉細闀夸箻浠ュ锛屽嵆1.5绫 x 0.5绫 = 0.75骞虫柟绫炽2. 渚ч潰绉紙涓や釜锛夛細闀夸箻浠ラ珮锛屽嵆1.5绫 x 0.8绫 = 1.2骞虫柟绫炽
