黄石市下陆区2018-2019学年度七年级上数学期中检测卷(含答案)新人教版
◆试题简介:
婀栧寳鐪侀粍鐭冲競涓嬮檰鍖?2018-2019 瀛﹀勾搴︼紙涓婏級涓冨勾绾ф暟瀛︽湡涓娴嬪嵎锛堝惈绛旀锛?
涓€銆侀€夋嫨棰?( 鏈ぇ棰樺叡 10 灏忛锛屾瘡灏忛 3 鍒嗭紝鍏?30 鍒嗭紟姣忓皬棰樺彧鏈変竴涓纭€夐」 )
1 锛?a 鐨勭浉鍙嶆暟鏄?( C )
A 锛?| a | B. C 锛庯紞 a D 锛庝互涓婇兘涓嶅
2 锛庝腑鍥戒汉寰堟棭寮€濮嬩娇鐢ㄨ礋鏁帮紝涓浗鍙や唬鏁板钁椾綔銆婁節绔犵畻鏈€嬬殑鈥滄柟绋嬧€濅竴绔狅紝鍦ㄤ笘鐣屾暟瀛﹀彶涓婇娆℃寮忓紩鍏ヨ礋鏁帮紝濡傛灉鏀跺叆 100 鍏冭浣? 100 鍏冿紝閭d箞锛?80 鍏冭〃绀猴紙 C 锛?
A 锛庢敮鍑?20 鍏? B 锛庢敹鍏?20 鍏? C 锛庢敮鍑?80 鍏? D 锛庢敹鍏?80 鍏?
3 锛庡湪 1 锛岋紞 2 锛?0 锛?53 杩欏洓涓暟涓紝鏈€澶х殑鏁版槸 ( C )
A 锛庯紞 2 B 锛?0 C.53 D 锛?1
4 锛庤嫢鏁拌酱涓婅〃绀猴紞 2 鍜?3 鐨勪袱鐐瑰垎鍒槸鐐?A 鍜?B 锛屽垯鐐?A 鍜岀偣 B 涔嬮棿鐨勮窛绂绘槸锛? D 锛?
A 锛庯紞 5 B 锛庯紞 1 C 锛?1 D 锛?5
5 锛庨暱鏂瑰舰绐楁埛涓婄殑瑁呴グ鐗╁鍥炬墍绀猴紝瀹冩槸鐢卞崐寰勫潎涓?b 鐨勪袱涓洓鍒嗕箣涓€鍦嗙粍鎴愶紝鍒欒兘灏勮繘闃冲厜閮ㄥ垎鐨勯潰绉槸 ( D)
A 锛?2 a 2 锛?蟺 b 2 B 锛?2 a 2 锛?b 2
C 锛?2 ab 锛?蟺 b 2 D 锛?2 ab 锛?b 2
绗?5 棰樺浘 绗?6 棰樺浘
6 锛庡鍥撅紝灏嗕竴寮犵瓑杈逛笁瑙掑舰绾哥墖娌垮悇杈逛腑鐐瑰壀鎴?4 涓皬涓夎褰紝绉颁负绗竴娆℃搷浣滐紱鐒跺悗灏嗗叾涓殑涓€涓笁瑙掑舰鎸夊悓鏍锋柟寮忓啀鍓垚 4 涓皬涓夎褰紝鍏卞緱鍒?7 涓皬涓夎褰紝绉颁负绗簩娆℃搷浣滐紱鍐嶅皢鍏朵腑涓€涓笁瑙掑舰鎸?鍚屾牱鏂瑰紡鍐嶅壀鎴?4 涓皬涓夎褰紝鍏卞緱鍒?10 涓皬涓夎褰紝绉颁负绗笁娆℃搷浣滐紱 鈥︹€?锛屾牴鎹互涓婃搷浣滐紝鑻ヨ寰楀埌 100 涓皬涓夎褰紝鍒欓渶瑕佹搷浣滅殑娆℃暟鏄?( B )
A 锛?25 B 锛?33 C 锛?34 D 锛?50
7 锛庝竴娆℃暟瀛﹁揪鏍囨娴嬬殑鎴愮哗浠?80 鍒嗕负鏍囧噯鎴愮哗锛屸€滃鏂椻€濆皬缁?4 鍚嶅鐢熺殑鎴愮哗涓庢爣鍑嗘垚缁╃殑宸涓?: 锛?7 鍒嗐€侊紞 6 鍒嗐€? 9 鍒嗐€? 2 鍒嗭紝浠栦滑鐨勫钩鍧囨垚缁╀负锛?D 锛?
A 锛?78 鍒? B 锛?82 鍒? C 锛?80.5 鍒? D 锛?79.5 鍒?
8 锛庤绠楋紞 3 锛?( 锛?1) 鐨勭粨鏋滄槸 ( D)
A 锛?2 B 锛庯紞 2 C 锛?4 D 锛庯紞 4
9 锛庣瓑杈光柍 ABC 鍦ㄦ暟杞翠笂鐨勪綅缃鍥炬墍绀猴紝鐐?A 銆?C 瀵瑰簲鐨勬暟鍒嗗埆涓?0 鍜岋紞 1 锛岃嫢鈻?ABC 缁曢《鐐规部椤烘椂閽堟柟鍚戝湪鏁拌酱涓婅繛缁炕杞紝缈昏浆 1 娆″悗锛岀偣 B 鎵€瀵瑰簲鐨勬暟涓?1 锛屽垯杩炵画缈昏浆 2012 娆″悗锛岀偣 B 锛? C 锛?
A 锛庝笉瀵瑰簲浠讳綍鏁? B 锛庡搴旂殑鏁版槸 2010 C 锛庡搴旂殑鏁版槸 2011 D 锛庡搴旂殑鏁版槸 2012
10 锛庡凡鐭?a 锛?b 锛?c 涓洪潪闆剁殑瀹炴暟锛屽垯 鐨勫彲鑳藉€肩殑涓暟涓猴紙 B 锛?
A 锛?4 B 锛?5 C 锛?6 D 锛?7
浜?銆?濉┖棰?( 姣忛 3 鍒嗭紝鍏?6 灏忛璁?18 鍒?)
11 锛庢煇鍦版煇澶╃殑鏈€楂樻皵娓╂槸 6 鈩冿紝鏈€浣庢皵娓╂槸锛?4 鈩冿紝鍒欒鍦板綋澶╃殑娓╁樊涓? 10 鈩冿紟
12 锛庤嫢 a 锛?3=0 锛屽垯 a 鐨勭浉鍙嶆暟鏄? -3 锛?
13 锛庣偣 A 琛ㄧず鏁拌酱涓婄殑涓€涓偣锛屽皢鐐?A 鍚戝彸绉诲姩 7 涓崟浣嶏紝鍐嶅悜宸︾Щ鍔?4 涓崟浣嶏紝缁堢偣鎭板ソ鏄師鐐癸紝鍒欑偣 A 琛ㄧず鐨勬暟鏄? -3 锛?
14 锛庤瀹氬浘褰?琛ㄧず杩愮畻 a 锛?b c 锛屽浘褰?琛ㄧず杩愮畻 x z 锛?纬 锛?w 锛庡垯
= 0 ( 鐩存帴鍐欏嚭绛旀 ) 锛?
15 锛庡凡鐭?| x | 锛?2 锛?| y | 锛?5 锛屼笖 x 锛?y 锛屽垯 x 锛?y 锛?___ 锛?3 鎴栵紞 7_____ 锛?
1 6 锛庡凡鐭ヤ袱涓畬鍏ㄧ浉鍚岀殑澶ч暱鏂瑰舰锛岄暱涓?a 锛屽悇鏀惧叆鍥涗釜瀹屽叏涓€鏍风殑鐧借壊灏忛暱鏂瑰舰鍚庯紝寰楀埌鍥?鈶?銆佸浘 鈶?锛岄偅涔堬紝鍥?鈶?涓槾褰遍儴鍒嗙殑鍛ㄩ暱涓庡浘 鈶?涓槾褰遍儴鍒嗙殑鍛ㄩ暱鐨勫樊鏄?____ a ____( 鐢ㄥ惈 a 鐨勪唬鏁板紡琛ㄧず ) 锛?
涓夈€佽В绛旈 ( 鍏?72 鍒?)
17 锛?(12 鍒?) 璁$畻棰橈紙 1 锛?( 锛?78) ( 5) ( 78) 锛?2 锛?( 23) ( 锛?17) ( 6) ( 锛?22)
锛?3 锛?[ 4 5 锛?( 锛? ) 脳 36] 梅 5 锛?4 锛?99 脳 ( 锛?36)
绛旀锛? 1)5 2)-10 3 锛?4 4 锛?-3599.5
18 锛?锛?10 鍒嗭級 鍏堝寲绠€锛屽啀姹傚€硷細锛?a 2 b 锛?( 3 ab 2 锛?a 2 b ) 锛?2(2 ab 2 锛?a 2 b ) 锛屽叾涓?a 锛濓紞 1 锛?b 锛濓紞 2.
瑙o細鍘熷紡锛濓紞 a 2 b 锛?3 ab 2 锛?a 2 b 锛?4 ab 2 锛?2 a 2 b 锛濓紞 ab 2 锛?(3 鍒?) 褰?a 锛濓紞 1 锛?b 锛濓紞 2 鏃讹紝鍘熷紡锛?4.
19 锛?锛?9 鍒嗭級 鑻ュ椤瑰紡 4 x n 锛?2 锛?5 x 2 锛?n 锛?6 鏄叧浜?x 鐨勪笁娆″椤瑰紡锛屾眰浠f暟寮?n 3 锛?2 n 锛?3 鐨勫€硷紟
瑙o細鐢遍鎰忓彲鐭ヨ澶氶」寮忔渶楂樻鏁伴」涓?3 娆★紝鍒嗗涓嬩袱绉嶆儏鍐碉細褰?n 锛?2 锛?3 鏃讹紝 n 锛?1 锛?鈭?鍘熷椤瑰紡涓?4 x 3 锛?5 x 锛?6 锛岀鍚堥鎰忥紝 鈭?n 3 锛?2 n 锛?3 锛?1 3 锛?2脳1 锛?3 锛?2 锛?(3 鍒?) 褰?2 锛?n 锛?3 鏃讹紝 n 锛濓紞 1 锛?鈭?鍘熷椤瑰紡涓?4 x 锛?5 x 3 锛?6 锛岀鍚堥鎰忥紝 鈭?n 3 锛?2 n 锛?3 锛?( 锛?1) 3 锛?2脳( 锛?1) 锛?3 锛?4.(5 鍒?) 缁间笂鎵€杩帮紝浠f暟寮?n 3 锛?2 n 锛?3 鐨勫€间负 2 鎴?4.
20 锛庯紙 9 鍒嗭級鏌愯嚜琛岃溅鍘備竴鍛ㄨ鍒掔敓浜?1050 杈嗚嚜琛岃溅锛屽钩鍧囨瘡澶╃敓浜?150 杈嗭紝鐢变簬鍚勭鍘熷洜瀹為檯姣忓ぉ鐢熶骇閲忎笌璁″垝閲忕浉姣旀湁鍑哄叆锛庝笅琛ㄦ槸鏌愬懆鐨勭敓浜ф儏鍐碉紙瓒呬骇涓烘銆佸噺浜т负璐燂級锛?
鏄熸湡
涓€
浜?
涓?
鍥?
浜?
鍏?
鏃?
澧炲噺
5
锕?2
锕?4
13
锕?10
16
锕?9
锛?1 锛夋牴鎹褰曞彲鐭ュ墠涓夊ぉ鍏辩敓浜? 杈嗭紱
锛?2 锛変骇閲忔渶澶氱殑涓€澶╂瘮浜ч噺鏈€灏戠殑涓€澶╁鐢熶骇 杈嗭紱
锛?3 锛夎鍘傚疄琛岃浠跺伐璧勫埗锛屾瘡杈嗚溅 50 鍏冿紝瓒呴瀹屾垚浠诲姟姣忚締濂?10 鍏冿紝灏戠敓浜т竴杈嗘墸 10 鍏冿紝閭d箞璇ュ巶宸ヤ汉杩欎竴鍛ㄧ殑宸ヨ祫鎬婚鏄灏戯紵
銆愯В绛斻€?瑙o細锛?1 锛? 5 锛堬梗 2 锛? 锛堬梗 4 锛?= 5 锛堬梗 6 锛?= 锕?1 锛?
150 脳 3 锛堬梗 1 锛?=450 锕?1=449 锛堣締锛夛紝
鈭?鍓嶄笁澶╁叡鐢熶骇 449 杈嗭紱
锛?2 锛夎瀵熷彲鐭ワ紝鏄熸湡鍏敓浜ф渶澶氾紝鏄熸湡浜旂敓浜ф渶灏戯紝
16 锕o紙锕?10 锛?=16 10=26 锛堣締锛夛紝
鈭?浜ч噺鏈€澶氱殑涓€澶╂瘮浜ч噺鏈€灏戠殑涓€澶╁鐢熶骇 26 杈嗭紱
锛?3 锛? 5 锛堬梗 2 锛? 锛堬梗 4 锛? 锛? 13 锛? 锛堬梗 10 锛? 锛? 16 锛? 锛堬梗 9 锛夛紝
=5 锕?2 锕?4 13 锕?10 16 锕?9 锛?
=5 13 16 锕?2 锕?4 锕?10 锕?9 锛?
=34 锕?25 锛?
=9 锛?
鈭?宸ヤ汉杩欎竴鍛ㄧ殑宸ヨ祫鎬婚鏄細锛?1050 9 锛?脳 50 9 脳 10=52950 90=53040 锛堝厓锛夛紟
21 锛?锛?10 鍒嗭級 鎿嶄綔鎺㈢┒锛氬凡鐭ュ湪绾搁潰涓婃湁涓€鏁拌酱 ( 濡傚浘鎵€绀?) 锛?
鎿嶄綔涓€锛?
(1) 鎶樺彔绾搁潰锛屼娇 1 琛ㄧず鐨勭偣涓庯紞 1 琛ㄧず鐨勭偣閲嶅悎锛屽垯锛?3 琛ㄧず鐨勭偣涓?________ 琛ㄧず鐨勭偣閲嶅悎锛?
鎿嶄綔浜岋細
(2) 鎶樺彔绾搁潰锛屼娇锛?1 琛ㄧず鐨勭偣涓?3 琛ㄧず鐨勭偣閲嶅悎锛屽洖绛斾互涓嬮棶棰橈細
鈶?5 琛ㄧず鐨勭偣涓庢暟 ________ 琛ㄧず鐨勭偣閲嶅悎锛?
鈶?鑻ユ暟杞翠笂 A 銆?B 涓ょ偣涔嬮棿璺濈涓?11( A 鍦?B 鐨勫乏渚?) 锛屼笖 A 銆?B 涓ょ偣缁忔姌鍙犲悗閲嶅悎锛屾眰 A 銆?B 涓ょ偣琛ㄧず鐨勬暟鏄灏戯紟
瑙o細 (1)3(3 鍒?)
(2) 鈶?锛?3(6 鍒?)
鈶?鐢遍鎰忓彲寰楋紝 A 銆?B 涓ょ偣璺濈瀵圭О鐐圭殑璺濈涓?11梅2 锛?5.5. 鈭?瀵圭О鐐规槸琛ㄧず 1 鐨勭偣锛?鈭?A 銆?B 涓ょ偣琛ㄧず鐨勬暟鍒嗗埆鏄紞 4.5 锛?6.5.(9 鍒?)
2 2 锛庯紙 10 鍒嗭級濡傚浘锛岃€佺帇寮€杞︿粠 A 鍒?D 锛屽叏绋嬪叡 72 鍗冪背锛庡叾涓?AB 娈典负骞冲湴锛岃溅閫熸槸 30 鍗冪背 / 灏忔椂锛?BC 娈典负涓婂北璺紝杞﹂€熸槸 22.5 鍗冪背 / 灏忔椂锛?CD 娈典负涓嬪北璺紝杞﹂€熸槸 36 鍗冪背 / 灏忔椂锛屽凡鐭ヤ笅灞辫矾鏄笂灞辫矾鐨?2 鍊嶏紟 [
锛?1 锛夎嫢 AB=6 鍗冪背锛岃€佺帇寮€杞︿粠 A 鍒?D 鍏遍渶澶氬皯鏃堕棿锛?
锛?2 锛夊綋 BC 鐨勯暱搴﹀湪涓€瀹氳寖
涓€銆侀€夋嫨棰?( 鏈ぇ棰樺叡 10 灏忛锛屾瘡灏忛 3 鍒嗭紝鍏?30 鍒嗭紟姣忓皬棰樺彧鏈変竴涓纭€夐」 )
1 锛?a 鐨勭浉鍙嶆暟鏄?( C )
A 锛?| a | B. C 锛庯紞 a D 锛庝互涓婇兘涓嶅
2 锛庝腑鍥戒汉寰堟棭寮€濮嬩娇鐢ㄨ礋鏁帮紝涓浗鍙や唬鏁板钁椾綔銆婁節绔犵畻鏈€嬬殑鈥滄柟绋嬧€濅竴绔狅紝鍦ㄤ笘鐣屾暟瀛﹀彶涓婇娆℃寮忓紩鍏ヨ礋鏁帮紝濡傛灉鏀跺叆 100 鍏冭浣? 100 鍏冿紝閭d箞锛?80 鍏冭〃绀猴紙 C 锛?
A 锛庢敮鍑?20 鍏? B 锛庢敹鍏?20 鍏? C 锛庢敮鍑?80 鍏? D 锛庢敹鍏?80 鍏?
3 锛庡湪 1 锛岋紞 2 锛?0 锛?53 杩欏洓涓暟涓紝鏈€澶х殑鏁版槸 ( C )
A 锛庯紞 2 B 锛?0 C.53 D 锛?1
4 锛庤嫢鏁拌酱涓婅〃绀猴紞 2 鍜?3 鐨勪袱鐐瑰垎鍒槸鐐?A 鍜?B 锛屽垯鐐?A 鍜岀偣 B 涔嬮棿鐨勮窛绂绘槸锛? D 锛?
A 锛庯紞 5 B 锛庯紞 1 C 锛?1 D 锛?5
5 锛庨暱鏂瑰舰绐楁埛涓婄殑瑁呴グ鐗╁鍥炬墍绀猴紝瀹冩槸鐢卞崐寰勫潎涓?b 鐨勪袱涓洓鍒嗕箣涓€鍦嗙粍鎴愶紝鍒欒兘灏勮繘闃冲厜閮ㄥ垎鐨勯潰绉槸 ( D)
A 锛?2 a 2 锛?蟺 b 2 B 锛?2 a 2 锛?b 2
C 锛?2 ab 锛?蟺 b 2 D 锛?2 ab 锛?b 2
绗?5 棰樺浘 绗?6 棰樺浘
6 锛庡鍥撅紝灏嗕竴寮犵瓑杈逛笁瑙掑舰绾哥墖娌垮悇杈逛腑鐐瑰壀鎴?4 涓皬涓夎褰紝绉颁负绗竴娆℃搷浣滐紱鐒跺悗灏嗗叾涓殑涓€涓笁瑙掑舰鎸夊悓鏍锋柟寮忓啀鍓垚 4 涓皬涓夎褰紝鍏卞緱鍒?7 涓皬涓夎褰紝绉颁负绗簩娆℃搷浣滐紱鍐嶅皢鍏朵腑涓€涓笁瑙掑舰鎸?鍚屾牱鏂瑰紡鍐嶅壀鎴?4 涓皬涓夎褰紝鍏卞緱鍒?10 涓皬涓夎褰紝绉颁负绗笁娆℃搷浣滐紱 鈥︹€?锛屾牴鎹互涓婃搷浣滐紝鑻ヨ寰楀埌 100 涓皬涓夎褰紝鍒欓渶瑕佹搷浣滅殑娆℃暟鏄?( B )
A 锛?25 B 锛?33 C 锛?34 D 锛?50
7 锛庝竴娆℃暟瀛﹁揪鏍囨娴嬬殑鎴愮哗浠?80 鍒嗕负鏍囧噯鎴愮哗锛屸€滃鏂椻€濆皬缁?4 鍚嶅鐢熺殑鎴愮哗涓庢爣鍑嗘垚缁╃殑宸涓?: 锛?7 鍒嗐€侊紞 6 鍒嗐€? 9 鍒嗐€? 2 鍒嗭紝浠栦滑鐨勫钩鍧囨垚缁╀负锛?D 锛?
A 锛?78 鍒? B 锛?82 鍒? C 锛?80.5 鍒? D 锛?79.5 鍒?
8 锛庤绠楋紞 3 锛?( 锛?1) 鐨勭粨鏋滄槸 ( D)
A 锛?2 B 锛庯紞 2 C 锛?4 D 锛庯紞 4
9 锛庣瓑杈光柍 ABC 鍦ㄦ暟杞翠笂鐨勪綅缃鍥炬墍绀猴紝鐐?A 銆?C 瀵瑰簲鐨勬暟鍒嗗埆涓?0 鍜岋紞 1 锛岃嫢鈻?ABC 缁曢《鐐规部椤烘椂閽堟柟鍚戝湪鏁拌酱涓婅繛缁炕杞紝缈昏浆 1 娆″悗锛岀偣 B 鎵€瀵瑰簲鐨勬暟涓?1 锛屽垯杩炵画缈昏浆 2012 娆″悗锛岀偣 B 锛? C 锛?
A 锛庝笉瀵瑰簲浠讳綍鏁? B 锛庡搴旂殑鏁版槸 2010 C 锛庡搴旂殑鏁版槸 2011 D 锛庡搴旂殑鏁版槸 2012
10 锛庡凡鐭?a 锛?b 锛?c 涓洪潪闆剁殑瀹炴暟锛屽垯 鐨勫彲鑳藉€肩殑涓暟涓猴紙 B 锛?
A 锛?4 B 锛?5 C 锛?6 D 锛?7
浜?銆?濉┖棰?( 姣忛 3 鍒嗭紝鍏?6 灏忛璁?18 鍒?)
11 锛庢煇鍦版煇澶╃殑鏈€楂樻皵娓╂槸 6 鈩冿紝鏈€浣庢皵娓╂槸锛?4 鈩冿紝鍒欒鍦板綋澶╃殑娓╁樊涓? 10 鈩冿紟
12 锛庤嫢 a 锛?3=0 锛屽垯 a 鐨勭浉鍙嶆暟鏄? -3 锛?
13 锛庣偣 A 琛ㄧず鏁拌酱涓婄殑涓€涓偣锛屽皢鐐?A 鍚戝彸绉诲姩 7 涓崟浣嶏紝鍐嶅悜宸︾Щ鍔?4 涓崟浣嶏紝缁堢偣鎭板ソ鏄師鐐癸紝鍒欑偣 A 琛ㄧず鐨勬暟鏄? -3 锛?
14 锛庤瀹氬浘褰?琛ㄧず杩愮畻 a 锛?b c 锛屽浘褰?琛ㄧず杩愮畻 x z 锛?纬 锛?w 锛庡垯
= 0 ( 鐩存帴鍐欏嚭绛旀 ) 锛?
15 锛庡凡鐭?| x | 锛?2 锛?| y | 锛?5 锛屼笖 x 锛?y 锛屽垯 x 锛?y 锛?___ 锛?3 鎴栵紞 7_____ 锛?
1 6 锛庡凡鐭ヤ袱涓畬鍏ㄧ浉鍚岀殑澶ч暱鏂瑰舰锛岄暱涓?a 锛屽悇鏀惧叆鍥涗釜瀹屽叏涓€鏍风殑鐧借壊灏忛暱鏂瑰舰鍚庯紝寰楀埌鍥?鈶?銆佸浘 鈶?锛岄偅涔堬紝鍥?鈶?涓槾褰遍儴鍒嗙殑鍛ㄩ暱涓庡浘 鈶?涓槾褰遍儴鍒嗙殑鍛ㄩ暱鐨勫樊鏄?____ a ____( 鐢ㄥ惈 a 鐨勪唬鏁板紡琛ㄧず ) 锛?
涓夈€佽В绛旈 ( 鍏?72 鍒?)
17 锛?(12 鍒?) 璁$畻棰橈紙 1 锛?( 锛?78) ( 5) ( 78) 锛?2 锛?( 23) ( 锛?17) ( 6) ( 锛?22)
锛?3 锛?[ 4 5 锛?( 锛? ) 脳 36] 梅 5 锛?4 锛?99 脳 ( 锛?36)
绛旀锛? 1)5 2)-10 3 锛?4 4 锛?-3599.5
18 锛?锛?10 鍒嗭級 鍏堝寲绠€锛屽啀姹傚€硷細锛?a 2 b 锛?( 3 ab 2 锛?a 2 b ) 锛?2(2 ab 2 锛?a 2 b ) 锛屽叾涓?a 锛濓紞 1 锛?b 锛濓紞 2.
瑙o細鍘熷紡锛濓紞 a 2 b 锛?3 ab 2 锛?a 2 b 锛?4 ab 2 锛?2 a 2 b 锛濓紞 ab 2 锛?(3 鍒?) 褰?a 锛濓紞 1 锛?b 锛濓紞 2 鏃讹紝鍘熷紡锛?4.
19 锛?锛?9 鍒嗭級 鑻ュ椤瑰紡 4 x n 锛?2 锛?5 x 2 锛?n 锛?6 鏄叧浜?x 鐨勪笁娆″椤瑰紡锛屾眰浠f暟寮?n 3 锛?2 n 锛?3 鐨勫€硷紟
瑙o細鐢遍鎰忓彲鐭ヨ澶氶」寮忔渶楂樻鏁伴」涓?3 娆★紝鍒嗗涓嬩袱绉嶆儏鍐碉細褰?n 锛?2 锛?3 鏃讹紝 n 锛?1 锛?鈭?鍘熷椤瑰紡涓?4 x 3 锛?5 x 锛?6 锛岀鍚堥鎰忥紝 鈭?n 3 锛?2 n 锛?3 锛?1 3 锛?2脳1 锛?3 锛?2 锛?(3 鍒?) 褰?2 锛?n 锛?3 鏃讹紝 n 锛濓紞 1 锛?鈭?鍘熷椤瑰紡涓?4 x 锛?5 x 3 锛?6 锛岀鍚堥鎰忥紝 鈭?n 3 锛?2 n 锛?3 锛?( 锛?1) 3 锛?2脳( 锛?1) 锛?3 锛?4.(5 鍒?) 缁间笂鎵€杩帮紝浠f暟寮?n 3 锛?2 n 锛?3 鐨勫€间负 2 鎴?4.
20 锛庯紙 9 鍒嗭級鏌愯嚜琛岃溅鍘備竴鍛ㄨ鍒掔敓浜?1050 杈嗚嚜琛岃溅锛屽钩鍧囨瘡澶╃敓浜?150 杈嗭紝鐢变簬鍚勭鍘熷洜瀹為檯姣忓ぉ鐢熶骇閲忎笌璁″垝閲忕浉姣旀湁鍑哄叆锛庝笅琛ㄦ槸鏌愬懆鐨勭敓浜ф儏鍐碉紙瓒呬骇涓烘銆佸噺浜т负璐燂級锛?
鏄熸湡
涓€
浜?
涓?
鍥?
浜?
鍏?
鏃?
澧炲噺
5
锕?2
锕?4
13
锕?10
16
锕?9
锛?1 锛夋牴鎹褰曞彲鐭ュ墠涓夊ぉ鍏辩敓浜? 杈嗭紱
锛?2 锛変骇閲忔渶澶氱殑涓€澶╂瘮浜ч噺鏈€灏戠殑涓€澶╁鐢熶骇 杈嗭紱
锛?3 锛夎鍘傚疄琛岃浠跺伐璧勫埗锛屾瘡杈嗚溅 50 鍏冿紝瓒呴瀹屾垚浠诲姟姣忚締濂?10 鍏冿紝灏戠敓浜т竴杈嗘墸 10 鍏冿紝閭d箞璇ュ巶宸ヤ汉杩欎竴鍛ㄧ殑宸ヨ祫鎬婚鏄灏戯紵
銆愯В绛斻€?瑙o細锛?1 锛? 5 锛堬梗 2 锛? 锛堬梗 4 锛?= 5 锛堬梗 6 锛?= 锕?1 锛?
150 脳 3 锛堬梗 1 锛?=450 锕?1=449 锛堣締锛夛紝
鈭?鍓嶄笁澶╁叡鐢熶骇 449 杈嗭紱
锛?2 锛夎瀵熷彲鐭ワ紝鏄熸湡鍏敓浜ф渶澶氾紝鏄熸湡浜旂敓浜ф渶灏戯紝
16 锕o紙锕?10 锛?=16 10=26 锛堣締锛夛紝
鈭?浜ч噺鏈€澶氱殑涓€澶╂瘮浜ч噺鏈€灏戠殑涓€澶╁鐢熶骇 26 杈嗭紱
锛?3 锛? 5 锛堬梗 2 锛? 锛堬梗 4 锛? 锛? 13 锛? 锛堬梗 10 锛? 锛? 16 锛? 锛堬梗 9 锛夛紝
=5 锕?2 锕?4 13 锕?10 16 锕?9 锛?
=5 13 16 锕?2 锕?4 锕?10 锕?9 锛?
=34 锕?25 锛?
=9 锛?
鈭?宸ヤ汉杩欎竴鍛ㄧ殑宸ヨ祫鎬婚鏄細锛?1050 9 锛?脳 50 9 脳 10=52950 90=53040 锛堝厓锛夛紟
21 锛?锛?10 鍒嗭級 鎿嶄綔鎺㈢┒锛氬凡鐭ュ湪绾搁潰涓婃湁涓€鏁拌酱 ( 濡傚浘鎵€绀?) 锛?
鎿嶄綔涓€锛?
(1) 鎶樺彔绾搁潰锛屼娇 1 琛ㄧず鐨勭偣涓庯紞 1 琛ㄧず鐨勭偣閲嶅悎锛屽垯锛?3 琛ㄧず鐨勭偣涓?________ 琛ㄧず鐨勭偣閲嶅悎锛?
鎿嶄綔浜岋細
(2) 鎶樺彔绾搁潰锛屼娇锛?1 琛ㄧず鐨勭偣涓?3 琛ㄧず鐨勭偣閲嶅悎锛屽洖绛斾互涓嬮棶棰橈細
鈶?5 琛ㄧず鐨勭偣涓庢暟 ________ 琛ㄧず鐨勭偣閲嶅悎锛?
鈶?鑻ユ暟杞翠笂 A 銆?B 涓ょ偣涔嬮棿璺濈涓?11( A 鍦?B 鐨勫乏渚?) 锛屼笖 A 銆?B 涓ょ偣缁忔姌鍙犲悗閲嶅悎锛屾眰 A 銆?B 涓ょ偣琛ㄧず鐨勬暟鏄灏戯紟
瑙o細 (1)3(3 鍒?)
(2) 鈶?锛?3(6 鍒?)
鈶?鐢遍鎰忓彲寰楋紝 A 銆?B 涓ょ偣璺濈瀵圭О鐐圭殑璺濈涓?11梅2 锛?5.5. 鈭?瀵圭О鐐规槸琛ㄧず 1 鐨勭偣锛?鈭?A 銆?B 涓ょ偣琛ㄧず鐨勬暟鍒嗗埆鏄紞 4.5 锛?6.5.(9 鍒?)
2 2 锛庯紙 10 鍒嗭級濡傚浘锛岃€佺帇寮€杞︿粠 A 鍒?D 锛屽叏绋嬪叡 72 鍗冪背锛庡叾涓?AB 娈典负骞冲湴锛岃溅閫熸槸 30 鍗冪背 / 灏忔椂锛?BC 娈典负涓婂北璺紝杞﹂€熸槸 22.5 鍗冪背 / 灏忔椂锛?CD 娈典负涓嬪北璺紝杞﹂€熸槸 36 鍗冪背 / 灏忔椂锛屽凡鐭ヤ笅灞辫矾鏄笂灞辫矾鐨?2 鍊嶏紟 [
锛?1 锛夎嫢 AB=6 鍗冪背锛岃€佺帇寮€杞︿粠 A 鍒?D 鍏遍渶澶氬皯鏃堕棿锛?
锛?2 锛夊綋 BC 鐨勯暱搴﹀湪涓€瀹氳寖
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