小学一年级奥数义1-24.doc

我会比一比 tuī?lǐ?bǐ?jiào 推?理比?较 kèqiánhuódòng 课?前?活????动 xiǎopéngyǒumenlái?bǐ?yì?bǐ????nǎtiáohóngxiàngèngchángne 小????朋????友?们?来比一比，哪?条????红????线????更??????长????呢？ yǎnjīngyǒudeshíhouchǎnshēngshìjuéchā?yì????yàoyòng?yì?xiēgōngjù 眼?睛?有?的?时?候????产??????生????视?觉?差?异，?要????用?一?些?工?具 lái?bǐ?jiàochángduǎn?kě?yǐ?shìchǐ?zi????shéng?zi????gé?zi????chǐ?zi?héshéng 来比?较?????长??????短?。可以?是?尺?子、?绳?子、格子。尺?子和????绳 zi?dōushìzhíjiēliáng?yì?liángjiùkě?yǐ?le?yònggé?zi?zuògōngjùdeshíhou 子?都?是?直?接?量?一?量?就?可以了，?用?格子?做????工?具的?时?候 yàozhù?yì?jì?qiǎo?ò 要?注?意技?巧?哦！ 【例?1】(★★) xiàmianchánzàigùn?zi?shàngdeliǎnggēnshéng?zi?????shuíchángshuí 下?面?????缠?在?棍?子????上????的?两????根?????绳????子，?谁??????长??????谁 duǎn 短?？ 【巩固】(★★) xiàmianliǎngzhīxiǎodòngwùzǒude?lù?xiàn????shuízǒudecháng 下?面?????两?只?小????动?物?走?的路?线?，?谁?走?的????长?？ 1 【例?2】(★★★) jiāngdàibiānhàodeqiān?bǐ?cóngduǎndàocháng?yī?cì?páiqǐ?lái 将?带?编?号?的?铅?笔?从?????短????到?????长?依次?排?起来。 【例?3】(★★★★) liǎngzhīxiǎoyā?zi?zhèngzàizhǎomāmā????shuíxiānzhǎodàomāmāne 两?只?小?鸭子?正????在?找?妈?妈?，?谁?先????找????到?妈?妈?呢？ zàixiānzhǎodàomāmādexiǎoyā?zi?shēnshàngdǎ 在?先????找????到?妈?妈?的?小?鸭子?身??????上????打“√”。 【巩固】(★★★★) liǎngzhīqīngwā?bǐ?sàichīdàngāo????tóngshíkāishǐchī????bìngqiěchīde?yí 两?只?青?蛙?比?赛?吃?蛋?糕?，?同?时?开?始?吃?，?并?且?吃?的?一 yàng?kuài????shuí?néng?xiān?chī?dào?yǒu?là?zhú?de?dì?fāng?bǎ?là?zhú?chuī 样?????快?，?谁?????能?????先?吃?到?有?蜡?烛?的?地?方?把?蜡?烛?吹 miè????qǐngbǎtāgěiquānqǐ?lái 灭?？?请?把它?给?圈?起来？ 【拓展】(★★★★) bǐ?yì?bǐ?????nǎzhīmāozuìxiānzhuādàolǎoshǔ????nǎzhīmāozuìhòuzhuā 比一比，?哪?只?猫?最?先????抓????到?老?鼠?？哪?只?猫?最?后????抓 dàolǎoshǔ 到?老?鼠?？ 2 tāzhēndezàidòngma 【开心课间】它?真?的?在?动?吗?？ hé????????liǎngxiōng?dì “”和?“”?两?????兄?弟 xiǎopéngyǒumendōurènshiděngyúhào?kěshì?nǐ?menzhīdàoděngyú 小????朋????友?们?都?认?识?等?于?号?，可?是?你?们?知?道????等?于 hàoháiyǒuliǎnggèxiōng?dì?ma????zhèliǎnggèxiōng?dì?dōuyǒu?yī?zhāng 号?还?有????两?个?兄?弟?吗?？?这????两?个?兄?弟?都?有?一????张 dàdàdezuǐbā????yī?gèjiàodàyúhào??????????dàzuǐbāzǒngshìcháozuǒ?zhǐ 大?大?的?嘴?巴，一个?叫?大?于?号?“”，大?嘴?巴?总?是?朝????左?，只 yàozuǒbianyǒudàde?zhòngde?chángde?duōdeděngděng?tājiù 要?左