一个长方形菜园,周长为16米,长与宽的比是5:1,求长方形的面积?
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\u957f\u3001\u5bbd\u7684\u548c\uff1a54/2=27\u5398\u7c73
\u957f\uff1a27/\uff085+4\uff09*5=15\u5398\u7c73
\u5bbd\uff1a27/\uff085+4\uff09*4=12\u5398\u7c73
\u957f\u65b9\u5f62\u7684\u9762\u79ef\uff1a12*15=180\u5e73\u65b9\u5398\u7c73
\u7b54\uff1a\u8fd9\u4e2a\u957f\u65b9\u5f62\u7684\u9762\u79ef\u662f180\u5e73\u65b9\u5398\u7c73\u3002
\u4e00\u4e2a\u957f\u65b9\u5f62\u7684\u5468\u957f\u662f36\u5398\u7c73\uff0c\u957f\u548c\u5bbd\u7684\u6bd4\u662f5\uff1a1\uff0c\u8fd9\u4e2a\u957f\u65b9\u5f62\u7684\u9762\u79ef\u662f\uff0845\u5e73\u65b9\u5398\u7c73\uff09
\u957f=36\u00f72\u00f7\uff085+1\uff09\u00d75=15\u5398\u7c73
\u5bbd=15\u00f75\u00d71=3\u5398\u7c73
\u9762\u79ef=15\u00d73=45\u5e73\u65b9\u5398\u7c73
宽16÷2×1/（5+1）=4/3米
面积20/3×4/3=80/9平方米
长=16÷2×5÷(5+1)=20/3分米
宽=20/3×1/5=4/3分米
面积=20/3×4/3=80/9平方米
绛旓細瀹斤細70梅2-25.5=9.5锛绫锛夐潰绉細25.5脳9.5=242.25锛堝钩鏂圭背锛
绛旓細36-16脳2锛4锛堢背锛 4梅2=2锛堢背锛 16脳2锛32锛堝钩鏂圭背锛夌瓟:闈㈢Н鏄32骞虫柟绫炽
绛旓細鍥存爮杈归暱4绫虫渶鍚堢悊銆傚洜涓洪潰绉鏄16骞虫柟绫筹紝鍥存爮杈归暱4绫崇殑姝鏂瑰舰鏈鍚堢悊锛岃繖鏍峰洿鐢ㄧ殑鏉愭枡鏈灏戙傛爡鏍忔槸涓绉嶇敤绔广佹湪銆侀搧鏉＄瓑鍋氭垚鐨勯樆鎷︾墿銆
绛旓細鍥犱负鐖卞洜鏂潶璇磋繃鐣寗閰变笉鑳芥斁鍦ㄦ病鍐欒繃鐗涢】鍔涘鍏紡鐨勭瑪璁版湰涓婃簿瀛熷痉灏旂鍑虹殑鍦熻眴涓冩垚娌规俯鐐稿嚭鐨勮柉鏉★紝鎵浠ヨ繖涓窛鏅绉嶈繃鐣寗鐨鑿滃洯瀛鍛ㄩ暱鏄72绫筹紝鏄竷鍗佷簩绫筹紝鏄竷鍗佷簩绫筹紒
绛旓細涓涓暱鏂瑰舰鑿滃洯闀116绫筹紝瀹73绫筹紝鐜板皢鑿滃洯鐨勫澧炲姞28绫筹紝鐜板湪鐨勮彍鍥潰绉鍔犱簡锛3248锛夊钩鏂圭背锛116*28 =3248锛堝钩鏂圭背锛
绛旓細涓涓暱鏂瑰舰鑿滃洯鐨鍛ㄩ暱鏄56绫筹紝闀挎瘮瀹藉4绫炽傝繖涓彍鍥殑闈㈢Н鏄灏戝钩鏂圭背锛熻В锛氳闀挎槸a绫筹紝瀹芥槸b绫筹紝鏍规嵁棰樻剰锛屽緱 {2(a+b)=56锛宎-b=4.瑙ｅ緱锛歿a=16锛宐=12 ab=192 绛旓細杩欎釜鑿滃洯鐨勯潰绉槸192骞虫柟绫炽
绛旓細鍥
绛旓細闈㈢Н鏄192骞虫柟绫
绛旓細112梅14=8锛堢背锛夛紙14+28锛塜8=336锛堢背锛涓涓暱鏂瑰舰鑿滃洯闀14绫抽潰绉112骞虫柟绫冲鏄8绫筹紝鐜板湪闀垮鍔犲埌28绫冲涓嶅彉姹傜幇鍦ㄩ潰绉336骞虫柟绫炽
绛旓細瑙ｏ細宸茬煡涓涓暱鏂瑰舰鑿滃洯瀹=16绫筹紝闈㈢Н=320骞虫柟绫筹紝涓旈潰绉=闀棵楀锛屽垯闀 =闈㈢Н梅瀹 =320梅16 =20绫 鍒欒繖涓暱鏂瑰舰鑿滃洯鐨勫懆闀 =2脳锛堥暱+瀹斤級=2脳锛20+16锛=2脳36 =72绫 绛旓細杩欎釜鑿滃洯鐨鍛ㄩ暱鏄72绫炽
