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- 2022-07-28 发布
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PLACEVALUEWITHDECIMALSChapter1.2\nHowdoIknowwhatkindofdecimalitis?ThenameofadecimalisdeterminedbythenumberofplacestotherightofthedecimalpointNumberofPlacesDecimalNameExample1tenths0.72hundredths0.053thousandths0.016\nWhataremixeddecimals?MixeddecimalsarenumberswithbothwholenumbersanddecimalsThenameofawholenumberisdeterminedbythenumberofplacestotheleftofthedecimalpointInthenumber128.765,1isinthehundredsplace,2isinthetensplace,8isintheonesplace,7isinthetenthsplace,6isinthehundredthsplace,and5isinthethousandthsplace\nHowdoyoureaddecimals?Toreadadecimalcorrectly,firstfindthedecimalpointWholenumbersaretotheleftofthedecimalpoint;anynumberstotherightofadecimalpointformadecimalfractionSay“and”forthedecimalpointThedecimal2164.511isreadas“twothousand,onehundredsixty-fourandfivehundredeleventhousandths”\nZerosafterthedecimalpointWritingextrazerosafterthedecimalpointdoesnotchangethevalue!Thedecimals0.2,0.20,and0.200areequivalentdecimals\nHEREARESOMEPRACTICEPROBLEMSINWHICHIWILLWORKTHROUGHWITHYOUTOMAKESURETHATYOUUNDERSTANDTHEMAINCONCEPTSCOVERED.Practice\nExercise1Writethedecimals.FivethousandthsNinety-fourthousandthsThreehundredthirty-sixandsixty-ninehundredths\nExercise2Writeeachdecimalinwords.7884.0115592.44.203612.25010.44\nExercise3Inwhatplace(ontheplacevaluechart)istheunderlineddigit?Writetheanswer.1.4753.7637780.215412.407902.103\nExercise4Writeadecimalthathasthesamenumber.0.25.51410.6753.809
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