(-8)-(-1) 45 (-30) (-1.5)-(-11.5)

1:54onefifty-four=sixtotwo7：21seventwenty-one=twenty-onepastseven3：15threefifteen=aquarterpastthree4

threeo'clocktenpastfouraquarterpastfivehalfpastsixaquartertoeighttenpasteight

1:50onefifty;tentotwo4:15fourfifteen;:aquarterpastfour6:30sixthirty;halfpastsix8:45eightforty-five；a

1:50-Tentotwo或Onefifty4:15-Quarterpastfour或Fourfifteen6:30-Halfpastsix或Sixthirty8:45-Quartertoeight或

halfpastsevenfifteentoeighteighto'clockfifteentonineaquarterpasttentwelveo'clockhalfpastonehalfpasts

7:30halfpastseven,seventhirty1:58onefiftyeight,twototwo9:45ninefortyfive,aquartertoten5:29fivetwenty

24/30=4/512/16=3/44/8=1/230/45=2/340/60=2/384/96=7/8105/120=7/840/70=4/716/24=2/336/54=2/333/99=1/33

1:20onetwenty或twentypastone6:45sixforty-five或aquartertoseven5:55fivefifty-five或fivetosix8:05eightofi

1.threetwenty,fivethirty,nineten,fourforty-five,eightfifteen.2.twentypastthree,halfpastfive,tenpastn

8分之5-30%X=20分之130.3x=5/8-13/200.3x=-1/40x=-1/12(1+25%)X=451.25x=45x=36

twominutespasttwo,2.02o'clock15minutespastsix,aquarterpastsixhalfpastnine,thirtyminutespastninetenmi

1点50tentotwo/onefifty4点15aquaterpassfour/fourfifteen6点30ahalfpass6/ahalftoseven/sixthirty8点45aquater

sevenfifteenapuarterpastseveneightfivefivepasteightninethirteenhalfpastninetenfiftytentofivethreefor

Inthe30sinhisfortyyearsoldAt8:3019:157:45他们的数字都是直接写的.

上午的时间后面加am(拉丁字：antemeridiem=beforenoon/midday)下午的时间后面加pm(拉丁字：postmeridiem=afternoon=postmidday)

1点50--onefifty,4点15--fourfifteen6点30--sixthirty8点45--eightforty-five11点55--elevenfifty-five

halfpastonetwotwenty(twentyaftertwo)threefourty(twentytofour)fourforty-five(aquartertofive)aquarterp

（7：15）sevenfifteen/aquarterpastseven（5：30）fivethirty/halfpastfive（1：25）onetwenty-five/twenty-fivepas

halfpasttwop.m.14:30fivepasteight8:05aquartertonine8:45

第30——thirtieth6：30——halfpastsix10：45——aquartertoten7：15——aquarterpastseven8：08——eightpasteight1：20——