人教版數(shù)學六下《5數(shù)學廣角》內(nèi)蒙古劉長河老師-教學設(shè)計-六年級數(shù)學教案

121?§ê±

1?ì?§??±ê.

1?￠?aê?ó????ü￡oá??a?°??32?êìa?±μ?ì?μ?￡?àí?a?°??32?àí?±μ?o?ò??￡ê1?§éú?§?áó?′??àí?a???òμ￥μ?êμ?ê?êìa?￡

2?￠1y3ìó?·?·¨￡o?àúì????°??32?àí?±μ??§?°1y3ì￡?ì??é1?2ì?￠2?2a?￠êμ?é?￠í?àíμè???ˉμ??§?°·?·¨￡?é?í?êyD??áo?μ??????￡

3?￠?é?D?￠ì??èoí???μ1?￡oí¨1yó??°??32?êìa?±?a???òμ￥μ?êμ?ê?êìa￡??¤·￠?§éúμ??§?°D?è¤￡?ê1?§éú?Dêüêy?§μ?÷èá|?￡

2?§?é·???.

??32?àíê??§éú′ó?′?ó′￥1yμ?D??aê?￡???ò?àí?a??32?àíμ????yo?ò?￡?·￠??óD?àμ±?àμ??§éú????×??oìá?°?è?§á?￡??ú??ì?·?μ?1y3ì?D￡????ú??ó????ù·?μ?·?·¨￡?ò2?ü?íò?????ì?μ??êìaμ?3??á???￡μ?ê??aD??§éú?D′ó?àêy???°?a??è?￡?2??a???ùò?è??±￡??aê2?′???ù·??ü±￡?¤?°?áéù?±μ??é??￡?????2￠2?àí?a?￡óDê±òa?òμ?êμ?ê?êìaó??°??32?àí?±????μ?áa?μ2￠2?èYò×￡??′ê1?òμ?á?￡?ò2oü??è·?¨ó?ê2?′×÷?a?°??32?±￡?òaó??????°??32?±?￡

1￡??êá?ì?μ?￡oáù?ê???§éú?èo??ˉó??úá2￡??ìê|ò?·???òaêêμ±òyμ?￡?òy·￠?§éúμ??§?°D?è¤￡?ê1????μ?×￠òaá|ê????ˉ?D?ú??ì?é?￡?áíò?·???òa′′?ìì??toí?ú?á￡?è??§éú·￠±í???a￡?·￠?ó?§éú?§?°μ??÷ì?D??￡

2￡?????ì?μ?￡o?aê?????é?￡?áù?ê??μ??§éú??óú×ü?á1??éμ?·?·¨?ó′￥±è??éù￡?óè????óú?°êy?§?¤?÷?±?￡òò′?￡??ìê|òa?íD?????μ?òyμ?￡????úè??§éú?àú?aê?μ?·￠éú?￠·￠?1oí1y3ì￡???2?ê?éú°áó2ì×￡????ó?á??￡?òaè??§éú2????a??è?￡??üòa?a???ùò?è??￡

3??μ???μ?.

?ì?§??μ?￡o

?àú?°??32?àí?±μ?ì???1y3ì￡?3?2?á??a?°??32?àí?±?￡

?ì?§??μ?￡o

àí?a?°??32?àí?±￡?2￠??ò?D??òμ￥êμ?ê?êìa?óò??°?￡Dí?ˉ?±?￡

4?ì?§1y3ì.

4.1μúò??§ê±

4.1.1?ì?§???ˉ.

???ˉ1??μ?è???ò??￠ó??·?¤è¤.

ê|￡oò??±??￡?è?3?′óD?í?￡??1ê￡52??￡?????5è???è???òa3éò???￡??áéùóD2????ê?í??¨é?μ??￡?aê2?′￡??a???D?ìo?×?ò???óDè¤μ?êy?§?àí￡??a?ú???ò???íò??eà′?D???a???àí?￡

á?×é5???§éúà′3é???????￡

???ˉ2?????ˉ???t?￠ì???D??a.

1.?ì?§ày1.(???t3?ê?àyìa1?é?3í?￡?

?????êìa￡o?￡?aê2?′??￡??°×üóD?±oí?°?áéù?±ê?ê2?′òa??￡?°?4?§?|±ê·???3??±êí2?D￡?2?1ü???′·?￡?×üóD1??±êí2à??áéùóD2?§?|±ê

?§éúí¨1y2ù×÷·￠??1??é?úàí?a1??ü′êμ?o?ò??úì????¤?÷?úè?ê??°??32?êìa?±μ??§?°1y3ìà′?a???êìa?￡

(1)2ù×÷·￠??1??é￡oí¨1y°?4?§?|±ê·???3??±êí2?D￡??éò?·￠??￡o2?1ü???′·?￡?×üóD1??±êí2à??áéùóD2?§?|±ê?￡

(2)àí?a1??ü′êμ?o?ò?￡o?°×üóD?±oí?°?áéù?±ê???°?4?§?|±ê·???3??±êí2?D￡?2?1ü???′·?￡?ò??¨óD1??±êí2à?μ??|±êêy′óóú?òμèóú2?§?￡

(3)ì????¤?÷?￡

·?·¨ò?￡oó??°???ù·¨?±?¤?÷?￡

°?4·??a3é3??êy?￡

óéí??é?a￡?°?4·??a3é3??êy￡?ó????ù·¨?à??￡?ò2óD4?D?é??￡???ò????é??·?μ?μ?3??êy?D￡??áéùóD1??êyê?2?D?óú2μ?êy?￡

￡¨4￡?·?·¨?t￡oó??°?ùéè·¨?±?¤?÷

°?5?§?|±ê·???4??±êí2?D￡?2?1ü???′·?￡?×üóD1??±êí2à??áéùóD2?§?|±ê?￡?aê2?′??￡?è?1?100?§?|±ê·?μ?99??±êí2à?￡?×üóDò???±êí2à??áéùóD???§?|±ê??￡?

ó?ê2?′·?·¨?üoü?ìμ??ò3?′e°???￡?

?§éúó??ùéè·¨?μ?÷￡?2￠áD3???ê?￡??ìê|°?êé??ê??￡

2?￠?ì?§ày2(???t3?ê?àyìa2?é?3í?￡?

?????êìa￡o￡¨ò?￡?°?7±?êé·???3??3éì?￡?2?1ü???′·?￡?×üóD1??3éì?à??áéùóD3±?êé?￡?aê2?′??￡?￡¨?t￡?è?1?óD8±?êé?á???ù??￡?10±?êé??￡?

?§éúí¨1y?°ì????¤?÷?úμ?3??á???±μ??§?°1y3ìà′?a???êìa￡¨ò?￡??￡

￡¨1￡?ì????¤?÷?￡

ó??ùéè·¨?¤?÷?￡

°?7±?êé???ù·?3é3·Y￡?7??3=2￡¨±?￡?......1￡¨±?￡?￡?è?????3éì?·?2±?￡??ò?1ê￡1±??￡è?1?°?ê￡??μ??a1±?êé·???è?òa1??3éì??D￡????′?a??3éì?à??íóD3±?êé?￡

￡¨2￡?μ?3??á???￡

í¨1yò?é?á???·?·¨???éò?·￠??￡o7±?êé·???3??3éì??D￡?2?1ü???′·?￡?×üóD1??3éì?à??áéù·???3±?êé?￡

?§éúí¨1y?°?ùéè·???·¨?ú1é?é×ü?á?±μ??§?°1y3ìà′?a???êìa￡¨?t￡??￡

￡¨1￡?ó??ùéè·¨·????￡

8??3=2￡¨±?￡?......2￡¨±?￡?￡?ê￡??2±?￡?·?±e·??????D2??3éì??D￡?ê1???D2??3éì???±?3é3±?￡?òò′?°?8±?êé·???3??3éì??D￡?2?1ü???′·?￡?×üóD1??3éì?à??áéù·???3±?êé?￡

10??3=3￡¨±?￡?......1￡¨±?￡?￡?°?10±?êé·???3??3éì??D￡?2?1ü???′·?￡?×üóD1??3éì?à??áéù·???4±?êé?￡

￡¨2￡?1é?é×ü?á￡o

×?o?é???á????é??￡?òa°?a±?êé·???3??3éì?à?￡?è?1?a??3=b￡¨±?￡?......1￡¨±?￡??òa??3=b￡¨±?￡?......2￡¨±?￡?￡????′ò??¨óD1??3éì?à??áéù·???￡¨b+1￡?±?êé?￡

￡¨3￡?á??a?°??32?àí?±μ?àúê·?aê??￡

???ˉ3??á·?°??èy?￠1?1ìá·?°.

1.à?ó??ù?§?aê??μ?÷?a??ê±??????ó??·μ??àí?￡

1?￠íê3é?ì2?μú70ò3μ??°×?ò?×??±μú1ìa?￡

?§éú?