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第九届学而思综合能力测评二年级数学试卷及答案解析

发布时间:2013-11-10 08:47:57  

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2.???????咥????ヨ????ヨ?ㄨ?

乏?3.???ㄨ?????ㄨㄨ乬??????????ㄨ????????????????????????ㄨ乬???ˊ????????乬?乬??????????????

1.???10ˇ11ˇ12ˇ13ˇ14ˇ…ˇ29ˇ30ˇ29ˇ….ˇ13ˇ12ˇ11ˇ100˙澬????????澭??????澞????=300φ30-2φ?1+2+3+4+5+6+7+8+9?=810澬????????澭????????И?????????澞

2.???????????????Ё?Ё?3????????????

澬????????澭???澞????????????????????????????????????????????????????????????澞澬????????澭???????????澞

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澬????????澭????????

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4ˊ1?3?2?2?1?3?2?2?1?3?…??????Ё??35???????????

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5ˊ??????Ё???????????

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6ˊ????????????????1???????1??2???????3??3???????5????????????????????47??М?????????????????

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7ˊ??哴????????????????????20????????????12??????8??????112

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澬????????澭?????????????????澞????????????М12h8=96????112-96=16????16r?20-12?=2??????????2???????8-2=6????????澬????????澭淪???澞

2/6

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8ˊ???????24????????????????????????24???????????4??????

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3/6

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澬????????澭???????澞

10ˊ???????????????????0?????????????????????9??????

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澬????????澭????З澞9=1+2+6????126,162,216,261,612,621??6?

=1+3+5????135,153,315,351,513,531??6?

=2+3+4????234,243,324,342,423,432??6???????3φ6=18???

澬????????澭???????澞

?ˊ?????????乬??????????????

11ˊ???????????????

2

6

8

澬????????澭????澞???????6+8?φ2+4h2=36?

澬????????澭??????澞

12ˊ???????????????Ф????????????????????????3??????Ф???

?????????ㄝ???????Ф??19?????????????????????????Ф?3?????????????????????

澬????????澭????З澞????????З????Щ?Ды????唉?????????????????Щ????З澞??????Щ????????????З???Т??????????????Щ??3h2+19h2=44????44r?3-1?=22????22+19=41????????41+3h2=47????澬????????澭???????????????????澞

4/6

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13ˊ??20???????????????????????????????????????????????????????????????????

????????????????????????ㄝ???????ㄝ??М?20????????????????????澬????????澭????????澞??????????▲???▲????Т?????????????????????ИИ??????З????????О??????????????????????????????О???????????????????????????????????#?????????????????????#?????????????????????????????#??????????澞

澬????????澭????????澞

14ˊ???????ā?????????????Ё??Ё??ā???????乕?????????佄?????????????????

???买??????????2???П???3?咘??????????2?????П???П???1???????????????????????????????????148???М?咘???????????

澬????????澭?????澞?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????#???????????????????????????????????

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5/6

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15ˊ????a??????????????????????????????????????????Ё????????????オオ????????????М?????????????????

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