鍝庯紒鐪嬪埌浠ｆ暟棰橀噷閭ｄ簺瀵嗗瘑楹婚夯鐨勬嫭鍙峰氨鎵嬫姈锛熸瘡娆℃媶瀹屾嫭鍙锋€诲彂鐜扮鍙峰叏涔卞锛熶粖澶╁挶浠氨鐢ㄦ墦娓告垙閫氬叧鐨勬柟寮忥紝鎶婃媶鎷彿鐨勫崄鍏埇姝﹁壓鍏ㄧ粰浣犳暣鏄庣櫧锛佷繚璇佷綘鐪嬪畬灏辫兘瀵圭潃鎷彿鍠婏細"灏辫繖锛?

鈻嶇鍙峰彉鑴哥幇鍦猴細鍒板簳鏄収鎶勮繕鏄炕鑴革紵

鍏堟潵鐏甸瓊鎷烽棶锛氣€?strong>鈥嬩负浠€涔堟湁鐨勬嫭鍙锋媶瀹岀鍙疯鍙橈紝鏈夌殑涓嶇敤锛熲€?/strong>鈥?涓句釜娲荤敓鐢熺殑渚嬪瓙锛?/p>

• 鐪嬪埌 +锛?x-2锛夋媶鎴?3x-2 鏃讹紝鎰熻鍍忓枬鍑夋按
• 浣嗛亣鍒?-锛?a+b锛夎鎷嗘垚 -5a-b 鏃讹紝鎬诲儚韪╅钑夌毊

鈥?strong>鈥嬬湡鐩稿彧鏈変竴涓€?/strong>鈥嬶細

鈥?strong>鈥嬫嫭鍙峰墠鏄姞鍙风収鎶勫啓锛屾嫭鍙峰墠鏄噺鍙峰叏鍙樿劯鈥?/strong>鈥?/p>

鐢ㄥ鍗栬鍗曟潵鐞嗚В鏇村甫鍔诧細

• 鈥?strong>鈥嬪姞鍙峰墠鈥?/strong>鈥?鈫?鍘熷懗濂楅锛?锛堥浮鑵?鍙箰锛夆啋 楦¤吙+鍙箰
• 鈥?strong>鈥嬪噺鍙峰墠鈥?/strong>鈥?鈫?鍙樻€佽荆濂楅锛?锛堟眽鍫?钖潯锛夆啋 -姹夊牎+钖潯

涓句釜缈昏溅璀︾ず锛?/p>

• 鉂?閿欙細-锛坸-2y锛夆啋 -x-2y 锛堣柉鏉℃病鍔犺荆锛?/li>
• 鉁?瀵癸細-x+2y 锛堝叏鍛樺彉鎬佽荆锛?/li>

鈻嶇郴鏁板垎閰嶅ぇ浣滄垬锛氶洦闇插潎娌炬墠鏄帇閬?/h3>

鈥?strong>鈥嬮亣鍒?(a-b)鐩存帴鎷嗘垚2a-b锛熸紡涔樼郴鏁拌鎵ｅ垎锛佲€?/strong>鈥?杩欏潙鎴戝綋骞翠篃璺宠繃锛?/p>

鈥?strong>鈥嬫纭Э鍔垮垎涓夋鈥?/strong>鈥嬶細
1锔忊儯 鈥?strong>鈥嬪湀閲嶇偣鈥?/strong>鈥嬶細鐢ㄨ崸鍏夌瑪鏍囪绯绘暟鍜屾嫭鍙?br/> 2锔忊儯 鈥?strong>鈥嬪彂绯栨灉鈥?/strong>鈥嬶細鎶婄郴鏁板綋绀肩墿鍒嗙粰鎷彿閲屾瘡涓皬浼欎即
3锔忊儯 鈥?strong>鈥嬫煡鎴峰彛鈥?/strong>鈥嬶細鎷嗗畬鏁颁汉澶寸‘淇濇病婕?/p>

鐪嬩釜鍙嶉潰鏁欐潗锛?/p>

• 鉂?閿欙細3(x+2y-z) 鈫?3x+6y-z 锛堢涓変釜灏忓彲鎬滄病鍒嗗埌锛?/li>
• 鉁?瀵癸細3x+6y-3z 锛堜汉鎵嬩竴浠斤級

鈥?strong>鈥嬮珮闃舵妧宸р€?/strong>鈥嬶細璐熺郴鏁拌褰撳姭鍖紝鍏堟姠绗﹀彿鍐嶅垎璧?/p>

• -4(2m-n) = (-4)脳2m + (-4)脳(-n) = -8m+4n

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鈻嶅濞冩嫭鍙锋媶瑙ｆ湳锛氬儚鍓ユ磱钁变竴鏍锋俯鏌?/h3>

鈥?strong>鈥嬮潰瀵?-[x+(y-z)] 鐩存帴鎵嬫挄锛熺瓑鐫€鍝惂锛佲€?/strong>鈥?璁颁綇杩欎釜鍙ｈ瘈锛?/p>

鈥?strong>鈥嬩粠鍐呭埌澶栨參鎱㈡潵锛屾媶涓€灞傛煡涓€灞傗€?/strong>鈥?/p>

瀹炴垬婕旂ず锛?/p>

markdown澶嶅埗
鍘熷紡锛?a - [2b - (3c + d)]  
鈶?鎷嗘渶鍐呭眰锛?a - [2b -3c -d] 鈫?娉ㄦ剰"-3c"鍜?+d"  
鈶?鎷嗕腑灞傦細5a -2b +3c +d 鈫?杩欓噷璐熷彿璁?b鍙?2b  

鈥?strong>鈥嬮伩鍧戞寚鍗椻€?/strong>鈥嬶細

• 鐢ㄤ笉鍚岄鑹叉爣璁板凡鎷嗛」
• 姣忔媶瀹屼竴灞傜珛鍗冲悎骞跺悓绫婚」

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鈻嶇鍙疯蹇嗛獨鎿嶄綔锛氳剳娲炲ぇ寮€璁板緱鐗?/h3>

鈥?strong>鈥嬫€昏涓嶄綇绗﹀彿瑙勫緥锛熻瘯璇曡繖浜涙鎷涒€?/strong>鈥嬶細

鈥?strong>鈥嬸煈?鍚冭揣鑱旀兂娉曗€?/strong>鈥?br/> 鎶婄鍙锋兂璞℃垚璋冨懗鏂欙細

• 鍔犲彿鏄師鍛宠柉鐗?鈫?淇濇寔鍘熷懗
• 鍑忓彿鏄姤鏈叡 鈫?鍏ㄥ憳鍒烘縺

鈥?strong>鈥嬸煈?鐖辫眴搴旀彺娉曗€?/strong>鈥?br/> 鎶婁唬鏁板紡褰撶埍璞嗙粍鍚堬細

• "+"鍓嶆槸瀹樻柟搴旀彺 鈫?淇濇寔闃熷舰
• "-"鍓嶆槸榛戠矇鎹ｄ贡 鈫?鍏ㄥ憳鍙嶈浆

涓句釜瀹炴垬妗堜緥锛?/p>

• -锛坅-b+c锛夆啋 榛戠矇璁゛鍙?a锛宐鍙?b锛宑鍙?c 鈫?-a+b-c

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鈻嶄綔姝绘搷浣滈粦鍚嶅崟锛氳繖浜涘潙鍗冧竾鍒俯锛?/h3>

鏍规嵁鍗佸勾琛€娉彶锛屾柊鎵嬫渶鏄撴墤琛楃殑涓夊ぇ鍧戯細

鈥?strong>鈥嬸煏?鍧?锛氶€夋嫨鎬уけ鏄庘€?/strong>鈥?br/> 鍙彉棣栭」绗﹀彿锛屽悗闈㈤」鏀鹃鑷垜
鈥?strong>鈥嬬牬瑙ｆ湳鈥?/strong>鈥嬶細鐢ㄤ笅鍒掔嚎鎸ㄤ釜鏍囪锛屾媶瀹屾暟椤规暟

鈥?strong>鈥嬸煏?鍧?锛氱郴鏁板埡瀹⑩€?/strong>鈥?br/> 閬囧埌 2(a-b) 鐩存帴鎷嗘垚 2a-b
鈥?strong>鈥嬩繚鍛芥妧鈥?/strong>鈥嬶細2脳a=2a锛?脳(-b)=-2b

鈥?strong>鈥嬸煏?鍧?锛氫贡鎷嗕竴姘斺€?/strong>鈥?br/> 瑙佸埌澶氶噸鎷彿鐩存帴涔辨挄
鈥?strong>鈥嬫纭Э鍔库€?/strong>鈥嬶細鍍忔媶蹇€掍竴鏍蜂粠澶栧埌鍐?/p>

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鈻嶅疄鎴樿缁冭惀锛氫粠闈掗摐鍒扮帇鑰?/h3>

鈥?strong>鈥嬫柊鎵嬫潙浠诲姟鈥?/strong>鈥嬶紙瀹屾垚鍙В閿佺毊鑲わ級锛?br/> 1锔忊儯 鍩虹绗﹀彿鍏筹細-锛坸+2y-z锛?br/> 2锔忊儯 绯绘暟鍒嗛厤鍏筹細-3(2a-4b+c)
3锔忊儯 濂楀▋鎷嗚В鍏筹細2[3x - (y + 2z)]

鈥?strong>鈥嬬帇鑰呮寫鎴橀鈥?/strong>鈥嬶細

markdown澶嶅埗
鍖栫畝锛?{a + [b - (c - d)]}  
鍒嗘鏀荤暐锛? 
鈶?鏈€鍐呭眰锛?(c-d) = -c+d  
鈶?涓眰锛歜 - (-c+d) = b+c-d  
鈶?澶栧眰锛?{a + [b+c-d]} = -a -b -c +d  

---

涓汉淇偧鎵嬪唽

鏁欎簡鍏勾鏁板鍙戠幇锛氣€?strong>鈥?0%鐨勯敊璇兘鍥犱负鎵嬫瘮鑴戝瓙蹇€?/strong>鈥嬨€傚缓璁悓鏂帮細

1. 鍑嗗涓夎壊绗旓細绾㈢瑪鏍囩鍙凤紝钃濈瑪鍐欐楠わ紝榛戠瑪鍋氳褰?/li>
2. 寤虹珛閿欓鍗氱墿棣嗭細鎶婂吀鍨嬮敊璇仛鎴愭爣鏈泦
3. 姣忓ぉ涓夐亾淇濆懡棰橈細鍧氭寔21澶╁舰鎴愯倢鑲夎蹇?/li>

鏈€鍚庨€佸彞璇濓細鈥?strong>鈥嬫參鎷嗕笁閬撻锛岃儨杩囩瀻鎷嗗崄閬撻鈥?/strong>鈥嬨€傜幇鍦ㄥ鑺?鍒嗛挓妫€鏌ワ紝鑰冭瘯灏辫兘灏戜涪10鍒嗭紒涓嶄俊锛熻瘯璇曞氨鐭ラ亾锝?/p>