小明买了3支铅笔和4块橡皮，一共花了2.7元，一支铅笔比一块橡皮贵2角，一支铅笔多少角？一块橡皮多 小明买了3枝铅笔4块橡皮一共花了2.7元,一枝铅笔不一块橡皮...
\u5c0f\u660e\u4e70\u4e863\u652f\u94c5\u7b14,4\u5757\u6a61\u76ae\u4e00\u5171\u82b1\u4e862.7\u5143,\u4e00\u652f\u94c5\u7b14\u6bd4\u4e00\u5757\u6a61\u76ae\u8d350.2\u5143\u3002\u95ee\u4e00\u652f\u94c5\u7b14\u591a\u5c11\u94b1\uff1f\u4e00\u5757\u6a61\u8bbe\u4e00\u679d\u94c5\u7b14x\u5143\uff0c\u8bbe\u4e00\u5757\u6a61\u76ae\uff08x-0.2\uff09\u5143\uff0c\u76843x+4\uff08x-0.2\uff09=2.7\uff0c
\u89e3\u5f97x=0.5 x-0.2=0.3
\u6240\u4ee5\u4e00\u679d\u94c5\u7b140.5\u5143\uff0c\u4e00\u5757\u6a61\u76ae0.3\u5143
\u8bbe\u4e00\u679d\u94c5\u7b14x\u5143\uff0c\u8bbe\u4e00\u5757\u6a61\u76ae\uff08x-0.2\uff09\u5143\uff0c\u76843x+4\uff08x-0.2\uff09=2.7\uff0c
\u89e3\u5f97x=0.5 x-0.2=0.3
\u6240\u4ee5\u4e00\u679d\u94c5\u7b140.5\u5143\uff0c\u4e00\u5757\u6a61\u76ae0.3\u5143
\u6216 \u8bbe7\u4e2a\u5168\u4e3a\u94c5\u7b14\uff0c\u603b\u4ef7\u94b1\u7b49\u4e8e2.7+0.2*4=3.5 \u4e00\u652f\u94c5\u7b14\u7684\u4ef7\u94b1=2.1/7=0.5
\u4e00\u5757\u6a61\u76ae\u7684\u94b1=0.5-0.2=0.3
1.7 = 0.3 + 2×0.2 + 2×0.5
一支铅笔，二块橡皮，二本练习册
求采纳
一块橡皮3角钱一支铅笔5角钱
绛旓細4鍏7瑙掑噺鍘2鍏1瑙掑氨鏄2涓閾呯瑪姗＄毊鐨勯挶锛屼篃灏辨槸2鍏6瑙掋 2鍏6瑙掗櫎浠2灏辨槸1涓姗＄毊鍜1鏀搮绗鐨勯挶锛屼篃灏辨槸1鍏3瑙掋 2鍏1瑙掑噺鍘1鍏3瑙掔瓑浜1涓鐨殑閽憋紝涔熷氨鏄8瑙掋 1鍏3瑙掑噺 8瑙掔瓑浜5瑙 閾呯瑪5瑙 姗＄毊8瑙 姹傚ソ璇 璋㈣阿锛
绛旓細3x+(x+0.35)+0.6=2
绛旓細2鍧楁鐨殑浠烽挶绛変簬4鏀搮绗鐨勪环閽憋紝閭ｄ箞 1鍧楁鐨鐨勪环閽辩瓑浜2鏀搮绗旂殑浠烽挶锛涢搮绗=6.6梅锛2脳3+5锛=0.6鍏 姗＄毊=0.6脳2=1.2鍏
绛旓細4.7-2.1=2.6(鍏) 1鏀搮绗锛2.6-2.1=0.5锛堝厓锛 1鍧楁鐨锛氾紙2.1-0.5锛*2=0.8锛堝厓锛=闄や互
绛旓細灏忔槑涔颁簡3鏀搮绗娌℃湁涔伴挗绗斾拱浜嗕袱鍧楁鐨鍏变粯涓夊厓銆傚皬鍐涗拱浜嗕竴鏀搮绗斾竴鏀挗绗旀病涔版鐨鍏变粯13.6鍏冦傚皬鍕囦拱浜嗕簲鏀搮绗旀病涔伴挗绗斾拱浜嗕袱鍧楁鐨叡浠4.6鍏冦... 灏忔槑涔颁簡3鏀搮绗旀病鏈変拱閽㈢瑪涔颁簡涓ゅ潡姗＄毊鍏变粯涓夊厓銆傚皬鍐涗拱浜嗕竴鏀搮绗斾竴鏀挗绗旀病涔版鐨叡浠13.6鍏冦傚皬鍕囦拱浜嗕簲鏀搮绗旀病涔伴挗绗斾拱浜嗕袱鍧楁鐨叡浠4.6鍏冦
绛旓細12鏀搮绗=4鍧楁鐨 鎵浠 3鏀搮绗=1鍧楁鐨 灏忔槑涔颁簡3鏀搮绗 鍥犱负韬笂鐨勯挶鍙互涔4鍧楁鐨傘傘傚墠闈 3鏀搮绗=1鍧楁鐨 锛鎵浠4-1=3 鍙互涔3鍧楁鐨
绛旓細姣忓潡姗＄毊: (7.8-0.6脳4)梅3=1.8(鍏)
绛旓細鐢变簬浣犻鐩潯浠剁粰鐨勪笉鍏呰冻锛屾垜鍙兘濂楁暟瀛椾簡 姗＄毊锛1鍏/涓 閾呯瑪锛0.9鍏/鏀 寰楀嚭鈥斺1*3+0.9*4=6.6锛堝厓锛夋垚绔嬶紒鍝堝搱鍝堝搱锛屽笇鏈涢噰绾硚~
绛旓細鐢2.8-2.3=0.5鍏冩槸閾呯瑪鍗曚环锛屽啀鐢2.3-0.5涔樹互3=0.8鏄姗＄毊鐨勫崟浠凤紝姹傚ソ璇
绛旓細閾呯瑪0.5鍏锛屾鐨0.8鍏冦
