number line activity数字线活动

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1、NumberLineActivity1)PrinttheNumberLineandFrog.Cutoutthefrogandthenumberline.Assemblethenumberline.2)Atthepositive(+)endofthenumberlinewritetheword“ADD”.Atthenegative(-)endofthenumberlinewritetheword“SUBTRACT”.3)ThisisatrainedfrognamedLEGS.LEGSwillmovewhengivenacommandwiththre

2、eparts.·ThefirstparttellsLEGSwheretostart.·Thesecondpartisoneofthetwowords“ADD”or“SUBTRACT”.IfthewordisADD,LEGSfacestheADDsign.IfthewordisSUBTRACT,LEGSfacestheSUBTRACTsign.·Thethirdpartofthecommandiseitherapositiveoranegativenumber.Ifthenumberispositive,LEGSmovesforward.Ifthe

3、numberisnegative,LEGSmovesbackward.Example1:LEGSisgiventhecommand,“Startat+2.ADD3.”LEGSstartsat+2,facestheADDsign,andmovesforward3spaces.Helandson+5.Example2:LEGSisgiventhecommand,“Startat+2.SUBTRACT3.”LEGSstartsat+2,facestheSUBTRACTsign,andmovesforward3spaces.Helandson-1.Exa

4、mple3:LEGSisgiventhecommand,“Startat-2.SUBTRACT-3.”LEGSstartsat-2,facestheSUBTRACTsignandmovesbackward3spaces.Helandson+1.ACTIVITY:“ABSOLUTELYLEGS”4)LEGSwasgiventhecommand,“Startat+3.SUBTRACT3.”MoveLEGSonthenumberline.OnwhatnumberdidLEGSland?5)PutLEGSon-3.LEGSwasgiventhecomma

5、nd,“Startat-3.ADD3.”ExplainwhereLEGSlanded?6)PutLEGSon+3.ADD-3.WheredoyoupredictLEGSwillland?Isthiscommandsimilartoanothercommand?7)IfLEGSissittingon-6,howmanyspaces(jumps)isthefrogfromzero?WhatistheothernumberwhereLEGScanstartandbethesamedistancefromzero?8)Filloutthetablebel

6、owandlookforapattern?PutLEGSonDistancefromZero-5+5+2-2+8.5-8.5Describethepatternyouobserved?Thispatterniscalledabsolutevalue.Itiswrittenlikethis:=3=39)Writeanotherexampleofabsolutevalue.Writeapositiveandnegativenumberthathavethesameabsolutevalue.10)Whatistheabsolutevalueof½(o

7、r)?Whatistheabsolutevalueof-3.71or()?ADDINGandSUBTRACTING1)StartLEGSon-3.“ADD+2.”WheredoesLEGSland?Anexpressionthatshowsthismovementis-3+2.2)HaveLEGSstayatthisnewlocation.“SUBTRACT+2.”LEGSgoesbackward2spaces.Whereishe?Anexpressionthatshowsthismovementis-1–(+2).Whatisanotherex

8、pressionthatwouldillustratethesamemovement?3)LEGSisstandingon(-2).a.