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小学一年级奥数举一反三c版精校版带解题答?- 百度文库

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ͬǵԭ෴ͼбķҲǽⳣõһַͨоǺ׷ֹɣӶ⡣

һ

1һֻСѼСӵ֮صΡһεһͽһΡʣ

1СѼ󰶣ɴֻ֮ص󰶣ôֻСѼεĴǵ˫

2СѼҰ99ΣСѼ󰶻Ұ

24Ѿñط֣꣬ÿ˶һֵ֣֪ܴǵ˫

ڻͨ

33+5+7+9++99ĺǵ˫

23ͼ

СѣͼܹǽһѧͼΣʶǵǵĹ۲һɣ

һͼм߶Σ A B C D E F

ֱ߲һ߶ΣʱУA߶ABACADAEAF5B߶BCBDBEBF4C߶CDCFCE3

D߶DEDF2E߶EF15+4+3+2+1=15

㾦 ߶ΡǡʱҪϸ۲죬˭ͷЩȺСģƴɵĵȵȣҪȲظֲ©

һ

1һͼймǣ

2 һͼжٸΣ

ڻͨ

3 һͼмΣ

24ж

Сѣ൱Сйߣȥжϰɣ СССһ˭ĻƬࡣ С˵ұСնࡣ С˵ұС١ С˵ұСࡣ Ƭ˭ٵ˭

ȰСѵĻóССն࣬СС٣СձСࡣڶ䣺ССٿ˵СС࣬ǰ֪СĻƬࡣ֣СձС࣬СյĻƬڶ࣬СĻƬ١ԣƬСٵС

㾦 жϵĹУҪϸ۲죬עеÿһϸ΢Ϣʾзͨ仰ĹжϣȵóһڽӶжϳĽҪʱɽлͼб һ

1 Сѱȶܡһ룬˭죿˭ 1 С˵ұС 2 Сǿ˵ұС졣 3 С˵ұСǿ

2塢ͳ壬һ˵ҽһˣһǽ

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˵Ҳǽʦ

˵˵ںһҽ彲֪ʶ ֪˵ְҵֱʲô

3ʦɺ졢ơɫĻֱСѡ С˵õIJǺ컨 С˵:õIJ

С˵ҿʦѺ컨ͻƻǰСѡ ˵һ˵СѷֱõʲôɫĻ ڻͨ

4 ССáСܺСĸСŶһȥѧС

ڵСýСܵĺߡĸСŵģд

25

ѧн෽;е⻻һ˼Ҳͱúܼ򵥡Ǿַȥоɣ

һ룬ÿĸʲô 7 A - B 3 ------------- 2 5

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ͬǵԭ෴ͼбķҲǽⳣõһַͨоǺ׷ֹɣӶ⡣ һ 1һֻСѼСӵ֮صΡһεһͽһΡʣ 1СѼ󰶣ɴֻ֮ص󰶣ôֻСѼεĴǵ˫ 2СѼҰ99ΣСѼ󰶻Ұ 24Ѿñط֣꣬ÿ˶һֵ֣֪ܴǵ˫ ڻͨ 33+5+7+9++99ĺǵ˫ 23ͼ СѣͼܹǽһѧͼΣʶǵǵĹ۲һ

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