鏁�(sh霉)閲忛棞(gu膩n)绯�

1.鏈夊洓浣嶆湅鍙嬬殑楂旈噸閮芥槸鏁村崈鍏嬫暩(sh霉)锛屼粬鍊戝€嗗€嗗悎绋遍珨閲嶏紝鍏辩ū5娆�锛岀ū寰楃殑鍗冨厠鏁�(sh霉)鍒嗗垾鏄�99锛�113锛�127锛�130锛�144锛屽叾涓叐鍊�(g猫)鏈€閲嶇殑娌掓湁涓€璧风ū閬庯紝閭ｄ箞閫欏叐浜轰腑楂旈噸杓冮噸鐨勪汉鐨勯珨閲嶆槸澶氬皯鍗冨厠?

A.51

B.65

C.72

D.86

2.濡傚湒锛屾湁涓€鍊�(g猫)11浣嶆暩(sh霉)锛屽畠鐨勬瘡3鍊�(g猫)鐩搁劙鏁�(sh霉)瀛椾箣鍜岄兘鏄�20锛屽墖妯�(bi膩o)鏈�*鐨勯偅鍊�(g猫)鏁�(sh霉)浣嶄笂鐨勬暩(sh霉)瀛楁噳(y墨ng)瑭叉槸澶氬皯?

A.9

B.7

C.5

D.3

3.鏌愭牎鐣㈡キ(y猫)鐢熷垎鐐�9鍊�(g猫)鐝紝姣忕彮浜烘暩(sh霉)鐩哥瓑銆傚凡鐭ヤ竴鐝敺鐢熸瘮浜�銆佷笁鐝コ鐢熺附鏁�(sh霉)澶�1銆傚洓銆佷簲銆佸叚鐝笁鍊�(g猫)鐝殑濂崇敓绺芥暩(sh霉)姣斾竷銆佸叓銆佷節鐝笁鍊�(g猫)鐝殑鐢风敓绺芥暩(sh霉)澶�1锛岄偅涔堣┎鏍＄暍妤�(y猫)鐢熶腑鐢�銆佸コ浜烘暩(sh霉)姣旀槸()銆�

A.5鈭�4

B.4鈭�5

C.3鈭�2

D.鐒℃硶瑷�(j矛)绠�

婧Θ鎻愮ず锛氱瓟妗堝強瑙ｆ瀽瑕嬩笅闋�(y猫)

鍙冭€冪瓟妗堝強瑙ｆ瀽

1.銆愮瓟妗堛€慏

瑙ｆ瀽锛氳ō(sh猫)閫欏洓鍊�(g猫)浜虹殑楂旈噸寰炲皬鍒板ぇ鍒嗗垾鐐篴銆乥銆乧銆乨銆傛牴鎿�(j霉)椤屾剰鍙緱鍥涗汉楂旈噸涔嬪拰鐐�113+144=257锛屽墖鏈€閲嶇殑鍏╁€�(g猫)浜虹殑楂旈噸涔嬪拰鐐�257-99=158鍗冨厠銆傚洜?y脿n)闁�+b=99銆乤+c=113锛屽墖c-b=113-99=14锛屽嵆c銆乥鐨勫樊鐐哄伓鏁�(sh霉)锛岄偅涔堝叐鑰呯殑鍜屼篃鐐哄伓鏁�(sh霉)锛屽洜姝ゆ湁b+c=130锛岃В寰梒=72銆傛墍浠ユ渶閲嶇殑浜虹殑楂旈噸鐐�158-72=86鍗冨厠銆�

2.銆愮瓟妗堛€態

瑙ｆ瀽锛氳ō(sh猫)閫欎覆?d膩ng)?sh霉)鐐�9abcdefghi7锛岀敱浜�“瀹冪殑姣�3鍊�(g猫)鐩搁劙鏁�(sh霉)瀛椾箣鍜岄兘鏄�20”锛屽彲鐭�9+a+b=a+b+c锛屾墍浠=9锛宎+b+c=b+c+d锛屽緱鍒癮=d锛屽悓鐞哹=e锛岄€欎覆?d膩ng)?sh霉)鍙互琛ㄧず鐐�9ab9ab…7锛屽嵆鍚勪綅鏁�(sh霉)瀛椾互3鐐哄懆鏈熷惊鐠�(hu谩n)鍑虹従(xi脿n)锛�11=3×3+2锛屾墍浠ョ浜屽€�(g猫)鏁�(sh霉)绛変簬绗崄涓€鍊�(g猫)鏁�(sh霉)7锛岀涓夊€�(g猫)鏁�(sh霉)鐐�20-9-7=4锛屾墍浠ラ€欏€�(g猫)鏁�(sh霉)鐐�97497497497锛屾(bi膩o)鏈�*鐨勯偅鍊�(g猫)鏁�(sh霉)浣嶄笂鐨勬暩(sh霉)瀛楁槸7銆�

3.銆愮瓟妗堛€慉

瑙ｆ瀽锛氳ō(sh猫)姣忕彮浜烘暩(sh霉)鐐簒锛屼竴銆佷簩銆佷笁鐝敺鐢熶汉鏁�(sh霉)涔嬪拰鐐轰簩銆佷笁鐝敺鐢熶汉鏁�(sh霉)+涓€鐝敺鐢熶汉鏁�(sh霉)=浜�銆佷笁鐝敺鐢熶汉鏁�(sh霉)+浜�銆佷笁鐝コ鐢熶汉鏁�(sh霉)+1=2x+1銆傚洓鍒颁節鐝敺鐢熶汉鏁�(sh霉)涔嬪拰鐐哄洓銆佷簲銆佸叚鐝敺鐢熶汉鏁�(sh霉)+涓冦€佸叓銆佷節鐝敺鐢熶汉鏁�(sh霉)=鍥涖€佷簲銆佸叚鐝敺鐢熶汉鏁�(sh霉)+鍥涖€佷簲銆佸叚鐝コ鐢熶汉鏁�(sh霉)-1=3x-1銆傛晠鐢风敓鍏辨湁2x+1+3x-1=5x锛�9鍊�(g猫)鐝附?c猫)钘�?sh霉)鐐�9x锛屽墖濂崇敓绺�?c猫)钘�?sh霉)鐐�9x-5x=4x浜�锛屽洜姝ょ敺濂虫瘮鐐�5x鈭�4x=5鈭�4銆�

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