长方形菜地长42米,宽35米,这块菜地有多少平方米?如果每块菜地拔萝卜5千克,这
\u4e00\u5757\u957f\u65b9\u5f62\u83dc\u5730\uff0c\u5468\u957f42\u7c73\uff0c\u957f\u548c\u5bbd\u7684\u6bd4\u662f5\uff1a2.\u8fd9\u5757\u83dc\u5730\u7684\u9762\u79ef\u662f\u591a\u5c11\u5e73\u65b9\u7c73\uff1f\u957f+\u5bbd=42\u00f72=21\u7c73
\u957f=21\u00f7(5+2)\u00d75=15\u7c73
\u5bbd=15\u00f75\u00d72=6\u7c73
\u9762\u79ef=15\u00d76=90\u5e73\u65b9\u7c73
1\uff0c\u8bbe\u5bbd\u4e3ax\u7c73\uff0c\u5219\u957f\u4e3a 1.2x-1
2(x+1.2x-1)=42\uff0c \u89e3\u5f97 x=10\u7c73\uff0c\u957f=1.2x-1=11\u7c73\uff0c \u9762\u79ef=11*10=110\u5e73\u7c73
2\uff0c\u8bbe\u4e59\u6cb9\u6876\u4e2d\u6cb9\u7684\u91cd\u91cf\u662fx\u5343\u514b\uff0c\u5219\u7532\u7684\u91cd\u91cf\u662f3x\uff0c\u6839\u636e\u9898\u610f\uff1a
3x-36=x+36\uff0c\u89e3\u5f97 x=36\u5343\u514b\uff0c3x=108\uff0c\u539f\u6765\u7532\u4e59\u4e24\u6876\u6cb9\u5206\u522b\u6709108\u548c36\u5343\u514b
3\uff0c\u8bbe\u4e59\u6cb9\u6876\u4e2d\u6cb9\u7684\u91cd\u91cf\u662fx\u5343\u514b\uff0c\u5219\u7532\u7684\u91cd\u91cf\u662f3x\uff0c\u6839\u636e\u9898\u610f\uff1a
3x-36=x\uff0c\u89e3\u5f97 x=18\u5343\u514b\uff0c3x=54\uff0c\u539f\u6765\u7532\u4e59\u4e24\u6876\u6cb9\u5206\u522b\u670954\u548c18\u5343\u514b
1470×5=7350千克
绛旓細42*35=1470骞虫柟绫
绛旓細154绫
绛旓細鍏堣绠椾竴涓闀挎柟褰鐨勯潰绉傜劧鍚庡湪闄や互姣忔５鏍戣嫍鍗犵殑闈㈢Н銆傚氨鍙互澶ф寰楀嚭銆傝绠楃畻寮42脳35梅2=735妫点
绛旓細锛1锛42脳35=1470锛堝钩鏂圭背锛夛紱锛2锛42+35脳2=112锛堢背锛
绛旓細42脳2+35脳2 =84+70 =154
绛旓細瑙ｏ細涓浜闀挎柟褰㈠湴闀=42绫筹紝瀹=35绫筹紝涓旇鍦ㄨ繖鍧楀湴閲屽缓涓涓渶澶х殑姝ｆ柟褰㈡父娉虫睜锛岄暱=42绫筹紴35绫=瀹斤紝寰楄繖涓鏂瑰舰娓告吵姹犵殑杈归暱=瀹=35绫筹紝鍒欒繖涓鏂瑰舰娓告吵姹犵殑闈㈢Н =杈归暱脳杈归暱 =35脳35 =1225骞虫柟绫 绛旓細娓告吵姹犵殑闈㈢Н鏄1225骞虫柟绫炽
绛旓細42x35浜1470骞虫柟绫筹紱35x35浜1225骞虫柟绫筹紱1470涓1225浜245骞虫柟绫虫父i娉虫睜闈㈢Н1225骞虫柟绫宠繕鍓╀笅245骞虫柟澶
绛旓細瑙ｏ細宸茬煡涓鍧闀挎柟褰㈣彍鍦伴暱=42绫筹紝瀹=38绫筹紝寰楄繖鍧楅暱鏂瑰舰鑿滃湴鐨勯潰绉 =闀棵楀 =42脳38 =1596骞虫柟绫 涓斿湪鑿滃湴鐨勫洓鍛ㄥ洿涓婄绗嗭紝寰楃绗嗛暱搴=闀挎柟褰㈣彍鍦板懆闀 =2脳锛堥暱+瀹斤級=2脳锛42+38锛=2脳80 =160绫 绛旓細杩欏潡鑿滃湴鐨勯潰绉槸1596骞虫柟绫筹紝绡辩瑔闀160绫炽
绛旓細杈归暱 36绫 鍛ㄩ暱 36x4=144绫 ~濡傛灉浣犺鍙垜鐨勫洖绛旓紝璇峰強鏃剁偣鍑汇愰噰绾充负婊℃剰鍥炵瓟銆戞寜閽畘~鎵嬫満鎻愰棶鑰呭湪瀹㈡埛绔彸涓婅璇勪环鐐广愭弧鎰忋戝嵆鍙倊浣犵殑閲囩撼鏄垜鍓嶈繘鐨勫姩鍔泘~~濡傝繕鏈夋柊鐨勯棶棰橈紝璇峰彟澶栧悜鎴戞眰鍔╋紝绛旈涓嶆槗锛屾暚璇疯皡瑙~O(鈭鈭)O锛岃寰楀ソ璇勫拰閲囩撼锛屼簰鐩稿府鍔 绁濆涔犺繘姝ワ紒
绛旓細鍙栧30鍋氭鏂瑰舰杈归暱 鍛ㄩ暱30脳4=120绫
