一桶色拉油连桶重55.1千克,用去一半油后连桶重30.1千克,油重多少千克?桶重多少千克? 一桶色拉油连桶重55.1千克,用去一半油后连桶重30.1千克...
\u4e00\u6876\u6cb9\u8fde\u6876\u91cd10.8\u5343\u514b\uff0c\u7528\u53bb\u4e00\u534a\u540e\uff0c\u8fde\u6876\u91cd5.7\u5343\u514b\uff0c\u6876\u91cd\u591a\u5343\u514b\uff1f\u6cb9\u91cd\u591a\u5c11\u5343\u514b\uff1f\u8fd9\u5c31\u662f\u4e00\u4e2a\u601d\u7ef4\u6a21\u5f0f\u7684\u95ee\u9898\uff0c2\u4e2a\u5df2\u77e5\u6761\u4ef6\uff0c\u4e00\u8fde\u6876\u603b\u8d28\u91cf10.8\u5343\u514b\uff0c\u534a\u6876\u6cb9\u52a0\u6876\u7684\u8d28\u91cf5.7\u5343\u514b\uff0c\u5e94\u8fd9\u6837\u601d\u8003\uff0c\u534a\u6876\u6cb9\u52a0\u6876\u7684\u8d28\u91cf*2,\u5f97\u5230\u7684\u662f\u4ec0\u4e48\u5462\uff0c\u7ed3\u679c\u662f\uff08\u534a\u6876\u6cb9\u7684\u8d28\u91cf+\u534a\u6876\u6cb9\u7684\u8d28\u91cf\uff09\u518d\u52a0\u4e0a2\u4e2a\u6876\u7684\u8d28\u91cf\uff0c\u4e00\u5171\u662f5.7*2=11.4\u5343\u514b\uff0c\u90a3\u4e48\u752811.4\u5343\u514b-10.8\u5343\u514b\u5f97\u5230\u7684\u5c31\u662f\u6876\u7684\u8d28\u91cf\uff0c\u6876\u7684\u8d28\u91cf\u662f0.6\u5343\u514b\uff0c\u518d\u752810.8\u5343\u514b-0.6\u5343\u514b\uff0c\u5f97\u5230\u7684\u5c31\u662f\u6cb9\u7684\u8d28\u91cf\u3002
\u89e3\uff1a
\u8bbe\u6cb9\u91cdX\u5343\u514b\uff0c\u6876\u91cdY\u5343\u514b\uff0c\u5219X+Y=10.8\uff0c½X+Y=5.7 \u89e3\u5f97X=10.2\uff0cY=0.6
\u4e00\u534a\u6cb9=55.1-30.1=25\uff08\u5343\u514b\uff09
\u6240\u4ee5\u6cb9\u91cd25*2=50\uff08\u5343\u514b\uff09
\u6876\u91cd55.1-50=5.1\uff08\u5343\u514b\uff09
(55.1-30.1)x2
=25x2
=50(千克)
桶重:
55.1-50=5.1(千克)
(55.1-30.1)×2
=25×2
=50千克
55.1-50=5.1千克
答油重50千克,桶重5.1千克
问:一桶色拉油连桶重55.1千克,用去一半油后连桶重30.1千克,油重多少千克?桶重多少千克?
解:油重:
(55.1-30.1)x2
=25x2
=50(千克)
桶重:
55.1-50=5.1(千克)
答:油重50千克,桶重5.1千克。
桶重30.1*2-55.1=5.1千克
油重55.1-5.1=50千克
绛旓細娌圭殑涓鍗婃槸 55.1锛30.1锛25锛鍗冨厠锛娌归噸 25脳2锛50锛堝崈鍏嬶級妗堕噸 55.1锛50锛5.1锛堝崈鍏嬶級
绛旓細30.1x2-55.1=60.2-55.1=5.1鍗冨厠绛 妗堕噸 5.1鍗冨厠
绛旓細55.1鈥30.1=25(鍗冨厠)鐢ㄤ簡25鍗冨厠锛鍗宠繖妗舵补鐨勪竴鍗婃槸25鍗冨厠銆25脳2=50(鍗冨厠)缁煎悎绠楀紡:(55.1鈥30.1)脳2 =25脳2 =50(鍗冨厠)杩欐《娌归噸25鍗冨厠銆備篃鍙互杩欐牱鎬濊:鍗婃《娌硅繛妗堕噸30.1鍗冨厠锛岄偅涔堬紝60.2鍗冨厠灏辨槸涓妗舵补鍔犱袱涓《鐨勯噸閲忥紝鍑忓幓涓妗舵补杩炴《鐨勯噸閲忥紝灏辨槸绌烘《鐨勯噸閲忋傗︹30.1脳2鈥...
绛旓細璁妗涓簒锛屾补涓簓 x+y=55.1 x+0.5y=30.1 瑙=5.1 y=50 鍗虫《鏈5.1kg
绛旓細娌癸細锛55.1-30.1锛壝2=50锛鍗冨厠锛妗锛55.1-50=5.1锛堝崈鍏嬶級浣犲ソ锛屾湰棰樺凡瑙g瓟,濡傛灉婊℃剰 璇风偣鍙充笂瑙掆滈噰绾崇瓟妗堚濄
绛旓細璁涓妗舵补閲嶄负X鍗冨厠锛屾《閲涓篩銆傚垯锛歑+Y=55.1銆俋/2+Y=30.1銆傝В鏂圭▼寰楀埌X=50,Y=5.1銆傝繖妗舵补閲50鍗冨厠锛屾《閲5.1鍗冨厠銆備簩鍏冧竴娆℃柟绋嬬粍 浜屽厓涓娆℃柟绋嬫槸鎸囧惈鏈変袱涓湭鐭ユ暟锛堜緥濡倄鍜寉锛夛紝骞朵笖鎵鍚湭鐭ユ暟鐨勯」鐨勬鏁伴兘鏄1鐨勬柟绋嬨備袱涓粨鍚堝湪涓璧风殑鍏卞惈鏈変袱涓湭鐭ユ暟鐨勪竴娆℃柟绋嬪彨浜屽厓涓娆℃柟绋嬬粍...
绛旓細1妗舵补+绌妗堕噸閲=55.1kg 0.5妗舵补+绌烘《閲嶉噺=30.1kg 鍙緱0.5妗舵补=55.1-30.1=25kg 1妗舵补=2*0.5妗舵补=25*2=50kg 绌烘《閲嶉噺=55.1-50=5.1kg 鏈缁堢瓟妗堬細5.1kg
绛旓細娌归噸锛(55.1-30.1)x2 =25x2 =50(鍗冨厠锛妗堕噸锛55.1-50=5.1(鍗冨厠)
绛旓細50.1-30.1=20 20闄や互2鍒嗕箣涓
绛旓細妗堕噸锛30.1 x 2 -55.1=5.1鍗冨厠 娌归噸锛55.1 - 5.1 = 50鍗冨厠