鏁�(sh霉)閲忛棞(gu膩n)绯�

1.绠卞瓙閲屾湁绱�銆佺櫧鍏╃ó鐜荤拑鐞�锛岀磪鐞冩暩(sh霉)鏄櫧鐞冪殑3鍊嶅2鍊�锛屾瘡娆″緸绠卞瓙閲屽彇鍑�7鍊嬬櫧鐞�锛�15鍊嬬磪鐞�銆傚鏋滅稉(j墨ng)閬庤嫢骞叉浠ュ悗锛岀瀛愰噷鍓╀笅3鍊嬬櫧鐞�锛�53鍊嬬磪鐞冿紝閭ｄ箞绠卞瓙閲屽師鏈夌磪鐞冨灏戝€�?

A.137

B.143

C.152

D.158

2.鐐轰簡杩庢帴绡€(ji茅)鏃�锛屾煇鍏徃瑕佸皣鑺卞湌鍏�(n猫i)鎵€鏈夌殑400鏍湀瀛ｉ兘鎻涙垚鐜懓锛屼絾鏄敱浜庨ⅷ(f膿ng)澶�锛屾瘡澶╅兘鏈夌浉鍚屾暩(sh霉)閲忕殑鐜懓鎼嶅銆傚凡鐭ユ瘡浜烘瘡澶╁彲浠ユ洿鎻�10鏍帿鐟帮紝鑻�4鍊嬩汉鏇存彌鍓囬渶瑕�20澶╂墠鍙互灏囪姳鍦掑収(n猫i)鐨勬湀瀛ｅ叏閮ㄦ彌鎴愭柊鐨勭帿鐟�锛岄偅涔堣嫢6鍊嬩汉鏇存彌锛屽墖闇€瑕佸灏戝ぉ鍙互灏囪姳鍦掑収(n猫i)鐨勬湀瀛ｅ叏閮ㄦ彌鎴愭柊鐨勭帿鐟�?( )

A.10

B.12

C.15

D.18

3.寰濧甯傚埌B甯傜殑鑸彮姣忓懆涓€銆佷簩銆佷笁銆佷簲鍚勭櫦(f膩)涓€鐝�銆傛煇骞�2鏈堟渶鍚庝竴澶╂槸鏄熸湡涓�銆傚晱鐣�(d膩ng)骞村緸A甯傚埌B甯傜殑鏈€鍚庝竴娆¤埅鐝槸鏄熸湡骞惧嚭鐧�(f膩)鐨�?( )

A.鏄熸湡涓€

B.鏄熸湡浜�

C.鏄熸湡涓�

D.鏄熸湡浜�

4.鏌愬競鐐哄悎鐞嗙敤闆�锛岄紦鍕靛悇鐢ㄦ埗瀹夎宄拌胺闆昏〃銆傝┎甯傚師闆诲児鐐�0.5鍏冩瘡搴︼紝鏀硅钖〃鍚�锛屾瘡澶╂櫄涓�9榛炶嚦娆℃棩鏃╀笂9榛炵偤浣庤胺锛屾瘡搴︾偤0.2,7鍏冿紝鍏朵綑鏅傞枔鐐洪珮宄板€�锛屾瘡搴︾偤0.53鍏冦€傜偤鏀硅鏂伴浕琛�锛屾瘡鍊嬬敤鎴堕爤浜ょ磵50鍏冩敼瑁濊不銆傚亣瀹氭煇鐢ㄦ埗姣忔湀鐢�100搴﹂浕锛屽叐鍊嬩笉鍚屾檪娈电敤闆婚噺鍚勭偤50搴�锛岄偅涔堟敼瑁濋浕琛ㄤ竴骞村悗锛岃┎鐢ㄦ埗鍙互绡€(ji茅)绱�( )鍏�銆�

A.90

B.70

C.50

D.30

婧Θ鎻愮ず锛氱瓟妗堣涓嬮爜

鍙冭€冪瓟妗堝強瑙ｆ瀽

1.銆愮瓟妗堛€慏

瑙ｆ瀽锛氬亣濡傛瘡娆″緸绠卞瓙涓彇鐧界悆7鍊�銆佺磪鐞�7×3=21鍊嬶紝閫欐ǎ锛屽湪绠卞瓙涓磪鐞冨€嬫暩(sh霉)绺戒繚鎸佺偤鐧界悆鏁�(sh霉)鐨�3鍊嶅2鍊�锛岀稉(j墨ng)閬庤嫢骞叉鍚�锛岀涓墿鐨勭櫧鐞冩暩(sh霉)閭勬槸3鍊�锛岀磪鐞冨氨鎳�(y墨ng)瑭插墿3×3+2=11鍊�銆傝垏椤屼腑鐩告瘮锛岀磪鐞冩瘡娆″鍙栦簡21-15=6鍊�锛屽彲瑕嬪叡鍙栦簡(53-11)÷6=7娆★紝鐧界悆鏈�7×7+3=52鍊�锛岀磪鐞冩湁52×3+2=158鍊嬶紝鎳�(y墨ng)閬告搰D銆�

2.銆愮瓟妗堛€慉

瑙ｆ瀽锛氳ō(sh猫)姣忓ぉ鏈墄鏍帿鐟版悕澹�锛�6鍊嬩汉闇€瑕亂澶╁彲浠ュ皣鑺卞叏閮ㄦ彌鎴愭柊鐨勭帿鐟�锛屽墖鍙緱锛� 400=(4×10-x) ×20 ;400=(6×10-x)×y銆傝В寰梮=20,y=10銆�

3.銆愮瓟妗堛€慉

瑙ｆ瀽锛氱敱椤屾剰鍙煡锛�2鏈堟渶鍚庝竴澶╂槸鏄熸湡涓夛紝鍓�3鏈�1鏃ョ偤鏄熸湡鍥�銆傚緸3鏈�1鏃ヨ嚦12鏈�31鏃ュ叡瑷堝ぉ鏁�(sh霉)閭勬湁365-31-28=306(闁忓勾鐐�366-31-29)銆�306÷7=43鍛ㄤ綑5澶�锛屽彲鍋囪ō(sh猫)3鏈�1鏃ユ槦鏈熷洓鐐虹涓€鍛ㄧ殑绗竴澶╋紝鍓囩43鍛ㄧ殑鏈€鍚庝竴澶╃偤鍛ㄤ笁锛屽啀缍�(j墨ng)閬�5澶╁墖鐐哄懆涓€锛屽嵆瑭插勾鐨勬渶鍚庝竴澶�12鏈�31鏃ョ偤鏄熸湡涓€锛屾晠鐣�(d膩ng)骞存渶鍚庝竴娆¤埅鐝槸鏄熸湡涓€鍑虹櫦(f膩)鐨�銆傛晠姝ｇ⒑绛旀鐐篈銆�

4銆愮瓟妗堛€態

瑙ｆ瀽锛氶浕琛ㄦ敼瑁濆墠瑭茬敤鎴朵竴骞寸殑鐢ㄩ浕璨荤敤鐐�100×0.5×12=600(鍏�);瑭茬敤鎴舵敼瑁濋浕琛ㄥ悗涓€骞村収(n猫i)鐨勭敤闆昏不鐢ㄥ姞涓婃敼瑁濊不鐢ㄥ叡(0.27×50+0.53×50)×12+50=530(鍏�)锛岃┎鐢ㄦ埗鏀硅闆昏〃涓€骞村悗鍙瘈(ji茅)绱�600-530=70(鍏�)銆�

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