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六年级下册数学总复习教?及反? - 百度文库

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ڼܳõʲôλܾ˵𣿣סףףǧףĿ𣿣

2ſμ

ܾ˵ʲôƽͼε𣿣ıΧƽĴСǵ

õλЩƽסƽסƽף 3ƽͼεܳıȽϣ

⣺뾶Ϊ1cmԲܳ˵Ϊʲô 1ж೤1ж೤1cmж೤ƱȻһ 2ܳļ㣺

1ѧļͼεܳ㹫ʽΪʲôҪ㣿

εܳĹʽ ĸʽ εܳĹʽ ĸʽ Բ֪ܳ뾶 ֱ֪

2ѧϰļͼε㹫ʽЩʽôƵģ

ϰſμ

1һƽıκһεȵ׵ȸߣ֪ƽıεδ7ƽסεǣ ƽıεǣ

2СԲ뾶2cmԲ뾶3cmСԲԲܳıǣ

3һԲֽƬƴһڰ뾶ȵĽƳΣε12.56 cmԭԲֽƬǣ cm

ġС᣺ڿЩջ 塢ҵ

ҵ87ҳġһ4⣬ϰʮ89ҳ5⣬91ҳ16⡣ κҵ87ҳġһ1⡢3⣬ϰʮ89ҳ23468⡣

21

22ѧ˼

˹оԡǻ۲DZģֻ֯úܺõ֪ʶϵϰεĿ֮һǽʦƽʱɢѧ֪ʶ㣬ѧһ׼ࡢϣŪǵȥ֪ͨʶ֮ϵһ֪ʶӶγõ֪ṹӽĽǶȿѧѧϰָѧԼѧ֪ʶĻˣϰҪѧһĿռ䣬ѧȥһԼ֪ʶһڡγõ֪ṹڡѧķ

ʱ ͼεʶ3

ѧݣʶͼΡ ѧĿ꣺

1ʹѧʶ塢壬ԲԲ׶֪ǵص㡣 2ѧϴӲͬ״

3ͼεʶֱ۹۲죬ʵѧϰ

4ǿѧ֪ʶճϵչѧĿռѧĴ¾ ѧصѵ㣺ͼ塢塢Բص㡣 ѧ׼μ ѧ̣

һϰعˣͼεʶ һʶ

ٲſμ88ҳ4һͼ

ָѧ˵˵ͼεƺص㡣 ѧ˵һ˵ͼиĸʾʲô ܰͼη

ÿ涼ƽ һ

Բ Բ׶

ݳ

22

1ص㡣 ͬ 桢12⡢˸ ͬ ĸdzΡ 涼 2Ĺϵ壬ͼԣ ʶԲԲ׶

ԲԲ׶ʲôص㣿˵һ˵дһд

Բ棬棬ͬСԲһ档 Բ׶棬һԲһ档 ϰ

88ҳ489ҳ9ԲʲôͼתõԳεһΪתɣԲ׶ʲôͼתõģֱεһֱDZΪᣬתɡ С᣺ڿʲôջ ġҵ 1 ͼ ƽı Բ ߳׻뾶 12m 20m ϵ7dmµ12dm ߻ֱ ܳ 6m 9m 14m 9dm 22.4dm 25.12cm 78cm2

ѧ˼ 1עؼǿ֪ʶ໥ϵ

ڿΣץס㣺һǿռͼεγɣǿռͼε֪ʶҾ֪ͨʶɽѧߡڸϰռͼεγʱѧܵͼθԵ͹ͬԼͬ㣻ڸϰռͼε֪ʶʱͨ۲졢䡢ͼε֪ʶͨ飬֪ʶ磬ǿ֪ʶ໥ϵ 2עطչѧĿռ

ͨĽѧߣѧͼεʶּڶСѧ׶ѧ

23

ͼνǿϵʵؿѧ֪档磺ѧԲIJչһʱ˳ѧһdzмֿܣչȽϣڱȽϱѧ֪ṹչռ

4ʱ ͼεʶ4

ѧݣͼεʶͼεıļ㡣 ѧĿ꣺

1ϰ塢塢ԲԲ׶ļ㹫ʽѧͼεʶʹѧѧ֪ʶϵͳ͸ 2ͨʵʲѧĶֲ

3ʹѧڽʵĹУѧϵ ѧصѵ㣺

1ɸͼεı㹫ʽϵ 2ѧ֪ʶеʵ⡣ ѧ׼μ ѧ̣

һϰļ㣺 1Ķ壺

ʲôͼεı塢塢ԲıЩ֣

ڳıЩ֮ͣԲıЩ֮ͣ 2ϰԲIJ

ԲIJظչʲô״չijεijԲʲôϵԲIJ㣿

չijεijԲĵܳԲĸߡ ԲIJ=ܳ S=ch

3DZļ㷽88ҳıУдͼεı㹫ʽ S=2ab+ah+bh

S=6a

SԲ=2rh+2r

ͼε㹫ʽ

1ϰ壬壬ԲԲ׶

һװˮУ㿴ʲô ˮˣΪռԲˮĿռ䡣

Ȥһλΰѧң׵£һɣӶĴš

2ϰ壬壬ԲԲ׶㷽 S

V= a b h V=sh

24

22

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ڼܳõʲôλܾ˵𣿣סףףǧףĿ𣿣 2ſμ ܾ˵ʲôƽͼε𣿣ıΧƽĴСǵ õλЩƽסƽסƽף 3ƽͼεܳıȽϣ ⣺뾶Ϊ1cmԲܳ˵Ϊʲô 1ж೤1ж೤1cmж೤ƱȻһ 2ܳļ㣺 1ѧļͼεܳ㹫ʽΪʲôҪ㣿 εܳĹʽ ĸʽ εܳĹʽ ĸʽ

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