人教版數(shù)學(xué)二上《8.數(shù)學(xué)廣角搭配（一）》寧夏哈珺老師-教學(xué)設(shè)計-二年級數(shù)學(xué)教案

121?§ê±

1?ì?§??±ê.

1?￠í¨1y2ù×÷?￠1?2ì?￠2?2aμè???ˉ,°??ú?§éú3?2?ì??á??áDó?×éo?μ?????·?·¨?￡

2?￠?à??3?2?μ?1?2ì?￠·????￠í?àí?üá|,ò??°??μ±μ???DDêy?§±í′?μ??üá|?￡

3?￠°??ú?§éú3?2??Dêü??áDó?×éo?μ?????·?·¨?úè?3￡éú???Dμ?ó|ó?,3?2??Dêüêy?§ó?éú??μ?áa?μ?￡

2?§?é·???.

?úò??°μ??§?°?D?§éúò??óDá?3?2?μ??òμ￥μ???áD×éo?μ??aê?,±??ú????μ?í¨1y2ù×÷?￠1?2ì?￠2?2aμè???ˉ,°??ú?§éú3?2?ì??á??áDó?×éo?μ?????·?·¨?￡?à??3?2?μ?1?2ì?￠·????￠í?àí?üá|,ò??°??μ±μ???DDêy?§±í′?μ??üá|?￡

3??μ???μ?.

?ú???ˉ?D?à???§éú3?2?ì??á??áDó?×éo?μ?????·?·¨,?à??3?2?μ?1?2ì?￠·????￠í?àí?üá|?°??μ±μ???DDêy?§±í′?μ??üá|,?Dêüêy?§ó?éú??μ?áa?μ?￡

4?ì?§1y3ì.

4.1μúò??§ê±

4.1.1?ì?§???ˉ.

???ˉ1??μ?è???ìá?ê?¤è¤￡???1êμ?D?.

1?￠ê|:?a?ú??à?ê|??í??§??′?à′ò????????2??μ?o??óó?,?ò??ò??eà′?′?′??ê?????(ê|3?ê?:?ˉ???è???′óí·?ù×ó)

2?￠ê|:′óí·?ù×ó??ó??aá????¨??1oí2,??ò???,ó??aá????¨???ü′???3?????á???êy?

3?￠ê|:?à′°úò?°ú(à?ê|°???°úμ??á1???????à′)?￡

4?￠ê|:?àóDè¤??!á???D?D?μ??¨??,?ò????DDá?2?í?μ?′???,?í?ü×é3é2?í?μ?êy?￡?a?ú??à?ê|?íoí????ò??e×???êy?§1????a?a′???(°?êé??ìa)

???ˉ2??μ?è???êμ?ù2ù×÷￡?ì???D??a.

???ˉò??a?a?àú?TDòμ?óDDò?￡

1?￠ê|:??2?′óí·?ù×óìá3?μ?μúò????êìaí??§??ò??°????a??á?,?ò??ò??eà′?′?′′óí·?ù×óìá3?μ?μú?t???êìa?￡

2?￠ó?1?￠2oí3×é3éá???êy,????á???êyμ?ê???êyoí????êy2??üò??ù,?ü×é3é????á???êy?(???t3?ê?ìa??)

3?￠ê|:2?ò?2??ü′???3?????á???êy?

4?￠ê|:???1ê????????ó?????μ??¨??°úò?°ú,±?°ú±?°???°úμ???ò???êy???????ú?a??±í??é??￡°úíêoó°???μ???·¨oíí?×àμ?í??§??á÷ò????￡

5?￠?1ê??§éú°ú3?êyμ??á1??￡

2?íê???a?a?TDòíê???a?aóDDòíê??(2￠????°úò?°ú,???§éú????)

?1ê??TDòμ?·?·¨

μ÷??????:12?￠21?￠13?￠31?￠23?￠32

6?￠(±è??íê???TDòoííê??óDDò)ìá3??êìa:?ò??ò??eà′?′?′,?aá???°ú·¨,??·￠??á?ê2?′?°???μ???·¨oíí?×àμ?í??§??á÷ò????￡

7?￠ìá3??êìa:?a??óD1??éóDê2?′o?′|???

?òê?:óDDò?￠2????′?￠2?ò????￡(°?êé)

8?￠ê|:?1óD????óDDòμ?·?·¨?e??1ê??§éúμ????ü·?·¨?￡(?à′?à??ò????a??í??§μ?°ú·¨?￡

?é??ò?:1ì?¨ê???:12?￠13?￠21?￠23?￠31?￠32

?é???t:1ì?¨????:21?￠31?￠12?￠32?￠13?￠23

9?￠ê|:à?ê|?1óDò???°ú·¨?e??à′?à??ò???à?ê|μ?°ú·¨?￡

???ˉ?t?a?aí?à??°°ú?±?§?áóDDòμ?D′?￡

1?￠ê|:??2??ò??ò??eoí′óí·?ù×óê???á?Dí?à?aê??￡′óí·?ù×óóD???êìa??????′ó?ò,3?ê?ìa??:ó?2?￠6oí8×é3éá???êy,????á???êyμ?ê???êyoí????êy2??üò??ù,?ü×é3é??D?á???êy?

2?￠óé?§éú?àá￠D′3??éò?×é3éμ?á???êy?￡

3?￠?1ê??§éúμ?2?í?μ?D′·¨,°??ú?§éúóDò?′?ì??áóDDòD′μ?·?·¨?￡

???ˉèy?a?aí??1ó?ó|ó?

1?￠ê|:?ò????2?ó?3???¨??′???3?á?6??êy?￡′óí·?ù×ó?????êò???′ó?ò:ê?2?ê?è?òaèy??ò???êyò??¨?ü′???3?6??á???êy???

2?￠?§éú?è?àá￠????,?ù°???·¨ó?í?×àμ?í??§??á÷?￡

3?￠?§éú??±¨,????í??§D′êy?é?¤?￡

???ˉ???a?aí??1ó?ó|ó?

1?￠ê|:′óí·?ù×ó°??§μ?μ??aê?ó?μ?á?êμ?êéú??ó|ó?μ?ê±oò,ó?μ?á?ò????êìa?ò??ò??eà′°?°???o??e?2￥·???ò?:?ò?????òμ?o??óó??T?¨ì?′ò??μ??°,?ò????μ????òμ?μ??°μ??°????êyê?2?￠3?￠5?￠7oóèy??êyê?óé9?￠4?￠0×é3éμ?,?T?¨ì??òμ?μ??°o????é?üê??àéù???

2?￠ê|:??í??§??D′ò?D′?￡

3?￠?1ê??§éúD′μ?μ??°o???,í?ê±?μò??μD′μ?·?·¨?￡

???ˉ???a?aí??1ó?ó|ó?

1?￠ê|:í??§????à÷o|,°?′óí·?ù×ó?a??á????úéú???Dó?μ?μ?μúò????êìa,?ò??ò??e?′?′???úéú???Dó?μ?μ?μú?t???êìa:????oíD?í·°?°??￠?§è1?è?èò??e??ò???è??ò?￡?￡3?ê?ìa??:×?3éò???o?ó°,óD?àéù??×?·¨?????ó?í?D??￠·?o??￠×????￠??×?μè,?ò???￠D′ò?D′±íê?3?????μ?×?·¨?￡

2?￠éúD′,?1ê??￡

???ˉ3??×÷òμ??D??áè???.

ê|:?