认rèn识shi时shí间jiān我wǒ们men的de一yì天tiān由yóu二èr十shí四sì个gè小xiǎo时shí组zǔ成chéng。我wǒ们men通tōng常cháng用yòng十shí二èr小xiǎo时shí制zhì来lái计jì时shí，凌líng晨chén零líng点diǎn到dào中zhōng午wǔ十shí二èr点diǎn是shì一yī个gè时shí段duàn，中zhōng午wǔ十shí二èr点diǎn开kāi始shǐ到dào凌líng晨chén零líng点diǎn又yòu是shì一yī个gè时shí段duàn。我wǒ们men通tōng常cháng把bǎ十shí三sān点diǎn计jì为wéi下xià午wǔ一yì点diǎn，十shí四sì点diǎn计jì为wéi下xià午wǔ两liǎng点diǎn，十shí五wǔ点diǎn计jì为wéi下xià午wǔ三sān点diǎn，以yǐ此cǐ类lèi推tuī。【例1】(★★)请你认一认时钟上的时间。【例2】(★★)小xiǎo明míng起qǐ床chuáng()小xiǎo明míng学xué习xí()小xiǎo明míng踢tī球qiú()小xiǎo明míng睡shuì觉jiào()【例3】(★★★)请qǐng你nǐ计jì算suàn下xià面mian的de时shí间jiān⑴现xiàn在zài是shì8∶30，请qǐng问wèn再zài过guò10分fēn钟zhōng是shì几jǐ点diǎn几jǐ分fēn？⑵现xiàn在zài是shì8∶20，请qǐng问wèn再zài过guò50分fēn钟zhōng是shì几jǐ点diǎn几jǐ分fēn？1⑶现xiàn在zài是shì10∶40，请qǐng问wèn30分fēn钟zhōng前qián是shì几jǐ点diǎn几jǐ分fēn？⑷现xiàn在zài是shì11∶15，请qǐng问wèn40分fēn钟zhōng前qián是shì几jǐ点diǎn几jǐ分fēn？【例4】(★★★★)艾ài迪dí早zǎo上shang从cóng家jiā里lǐ出chū发fā去qù上shàng学xué，他tā再zài路lù上shang走zǒu了le40分fēn钟zhōng，到dào了le学xué校xiào他tā一yī看kàn已yǐ经jīng8点diǎn20分fēn了le，请qǐng问wèn艾ài迪dí几jǐ点diǎn才cái从cóng家jiā里lǐ出chū发fā的de？【例5】(★★★★)小xiǎo丸wán子zi早zǎo上shang九jiǔ点diǎn出chū门mén去qù公gōng园yuán玩wán，她tā下xià午wǔ两liǎng点diǎn回huí家jiā了le，请qǐng问wèn她tā在zài外wài面miàn玩wán了le多duō长cháng时shí间jiān？【例6】(★★★★★)为wèi了le迎yíng接jiē儿ér童tóng节jié的de到dào来lái，百bǎi货huò商shāng店diàn把bǎ营yíng业yè时shí间jiān调tiáo整zhěng成chéng早zǎo上shang8点diǎn到dào晚上11点wǎnshangdiǎn，请qǐng问wèn百bǎi货huò商shāng店diàn一yì天tiān一yí共gòng营yíng业yè多duō长cháng时shí间jiān？2
