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1、3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412
2、737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051
3、320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473
4、035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989380952572010654858632788659361533818279682303019520353018529689957736225994138912497217752834791315155748572424541506959508295331168617278558890750983817546374649393192550604009277016711390098488240
5、128583616035637076601047101819429555961989467678374494482553797747268471040475346462080466842590694912933136770289891521047521620569660240580381501935112533824300355876402474964732639141992726042699227967823547816360093417216412199245863150302861829745557067498385054945885869269956909272107975093029
6、553211653449872027559602364806654991198818347977535663698074265425278625518184175746728909777727938000816470600161452491921732172147723501414419735685481613611573525521334757418494684385233239073941433345477624168625189835694855620992192221842725502542568876717904946016534668049886272327917860857843
7、838279679766814541009538837863609506800642251252051173929848960841284886269456042419652850222106611863067442786220391949450471237137869609563643719172874677646575739624138908658326459958133904780275900994657640789512694683983525957098258226205224894077267194782684826014769909026401363944374553050682
8、034962524517493996514314298091906592509372216964615157098583874105978859597729754989301617539284681382686838689427741559918559252459539594310499725246808459872736446958486538367362226260991246080512438843904512441365497627807977156914359977001296160894416948685558484063534220722258284886481584560285
9、060168427394522674676788952521385225499546667278239864565961163548862305774564980355936345681743241125150760694794510965960940252288797108931456691368672287489405601015033086179286809208747609178249385890097149096759852613655497818931297848216829989487226588048575640142704775551323796414515237462343
10、645428584447952658678210511413547357395231134271661021359695362314429524849371871101457654035902799344037420073105785390621983874478084784896833214457138687519435064302184531910484810053706146806749192781911979399520614196634287544406437451237181921799983910159195618146751426912397489409071864942319
11、615679452080951465502252316038819301420937621378559566389377870830390697920773467221825625996615014215030680384477345492026054146659252014974428507325186660021324340881907104863317346496514539057962685610055081066587969981635747363840525714591028970641401109712062804390397595156771577004203378699360
12、072305587631763594218731251471205329281918261861258673215791984148488291644706095752706957220917567116722910981690915280173506712748583222871835209353965725121083579151369882091444210067510334671103141267111369908658516398315019701651511685171437657618351556508849099898599823873455283316355076479185
13、358932261854896321329330898570642046752590709154814165498594616371802709819943099244889575712828905923233260972997120844335732654893823911932597463667305836041428138830320382490375898524374417029132765618093773444030707469211201913020330380197621101100449293215160842444859637669838952286847831235526
14、582131449576857262433441893039686426243410773226978028073189154411010446823252716201052652272111660396665573092547110557853763466820653109896526918620564769312570586356620185581007293606598764861179104533488503461136576867532494416680396265797877185560845529654126654085306143444318586769751456614068
15、007002378776591344017127494704205622305389945613140711270004078547332699390814546646458807972708266830634328587856983052358089330657574067954571637752542021149557615814002501262285941302164715509792592309907965473761255176567513575178296664547791745011299614890304639947132962107340437518957359614589
16、019389713111790429782856475032031986915140287080859904801094121472213179476477726224142548545403321571853061422881375850430633217518297986622371721591607716692547487389866549494501146540628433663937900397692656721463853067360965712091807638327166416274888800786925602902284721040317211860820419000422
17、966171196377921337575114959501566049631862947265473642523081770367515906735023507283540567040386743513622224771589150495309844489333096340878076932599397805419341447377441842631298608099888687413260472156951623965864573021631598193195167353812974167729478672422924654366800980676928238280689964004824
18、354037014163149658979409243237896907069779422362508221688957383798623001593776471651228935786015881617557829735233446042815126272037343146531977774160319906655418763979293344195215413418994854447345673831624993419131814809277771038638773431772075456545322077709212019051660962804909263601975988281613
19、323166636528619326686336062735676303544776280350450777235547105859548702790814356240145171806246436267945612753181340783303362542327839449753824372058353114771199260638133467768796959703098339130771098704085913374641442822772634659470474587847787201927715280731767907707157213444730605700733492436931
20、138350493163128404251219256517980694113528013147013047816437885185290928545201165839341965621349143415956258658655705526904965209858033850722426482939728584783163057777560688876446248246857926039535277348030480290058760758251047470916439613626760449256274204208320856611906254543372131535958450687724
21、602901618766795240616342522577195429162991930645537799140373404328752628889639958794757291746426357455254079091451357111369410911939325191076020825202618798531887705842972591677813149699009019211697173727847684726860849003377024242916513005005168323364350389517029893922334517220138128069650117844087
22、451960121228599371623130171144484640903890644954440061986907548516026327505298349187407866808818338510228334508504860825039302133219715518430635455007668282949304137765527939751754613953984683393638304746119966538581538420568533862186725233402830871123282789212507712629463229563989898935821167456270
23、102183564622013496715188190973038119800497340723961036854066431939509790190699639552453005450580685501956730229219139339185680344903982059551002263535361920419947455385938102343955449597783779023742161727111723643435439478221818528624085140066604433258885698670543154706965747458550332323342107301545
24、9405165537906866273337995851156257843229882737231989875714159578111963583300594087306812160287649628674460477464915995054973742562690104903778198683593814657412680492564879855614537234786733039046883834363www.readinga-Visit www.readinga- for thousands of books and materials.LEVELED BOOK RWritten by
25、Nora MillerPi DayA Reading AZ Level R Leveled BookWord Count:911www.readinga-Pi DayLevel R Leveled Book Learning AZWritten by Nora MillerAll rights reserved.www.readinga-Photo Credits:Back cover:Joe Gill/Express-Times/Landov;title page:Mike Vogt/Idaho Press-Tribune/AP Images;page 3:Chitose Suzuki/AP
26、 Images;page 4:iStock/DebbiSmirnoff;page 6:Christies Images/Bridgeman Images;page 7:Michael Sullivan/The News-Review/AP Images;page 8:David Frazier/Corbis;page 10(top):Hubble data:NASA,ESA,and A.Zezas(Harvard-Smithsonian Center for Astrophysics);GALEX data:NASA,JPL-Caltech,GALEX Team,J.Huchra et al.
27、(Harvard-Smithsonian Center for Astrophysics);Spitzer data:NASA/JPL/Caltech/Harvard-Smithsonian Center for Astrophysics;page 10(bottom):Xinhua/Landov;page 12:Keystone Pictures USA/Alamy;pages 13,15:ZUMA Press,Inc/Alamy;page 14:Amy Snyder,Exploratorium,www.exploratorium.eduIllustration Credits:Pages
28、5,9,11:John Manders/Learning AZTitle page:On Pi Day,some people compete in a pi-throwing event.Page 3:Some students make themselves into pi on Pi Day.Back cover:Sometimes people get a choice of pies to eat on Pi Day.Written by Nora MillerCorrelationLEVEL RN3030Fountas&PinnellReading RecoveryDRA1516A
29、fter all that eating,some people work off their food by walking or running a pi marathon.These runs have distances of 3.14 miles(5.05 km)or 3.14 kilometers(1.95 mi.).Walking or running in a circle is also an option.Other people celebrate by decorating their rooms or themselves with pi-themed objects
30、.They cut out the shape of and put it on walls and tables.Some people wear T-shirts with on them or-shaped jewelry.Mathematicians celebrate the number pi because it is useful and important for many mathematical and scientific projects.The rest of us can celebrate Pi Day,too.It helps us remember that
31、 science can be fun as well as useful.Glossaryarea(n.)the amount of space that could cover the surface of a shape or region as measured in square units(p.8)calculate(v.)to work out or estimate an answer using mathematics(p.7)circumference the distance around the outside (n.)of a circle(p.5)decimal p
32、oint the dot in a number such as 1.47 (n.)that indicates that the numbers to the right of it are tenths,hundredths,and so on(p.7)diameter(n.)the length of a straight line drawn through the center of a circle or a sphere from one side to the other(p.5)digits(n.)the numerals from 0 to 9 that can be us
33、ed to write any number(p.7)divided(v.)worked out a number by the process of division,in math;found how many times one number went into another number(p.5)pi(n.)a constant value that represents the ratio between the circumference and diameter of a circle(p.4)volume(n.)the amount of space that somethi
34、ng takes up as measured in cubic units(p.9)Some people like pi so much that they wear it.Pi Day Level Rwww.readinga-Pi DayLevel R Leveled Book Learning AZWritten by Nora MillerAll rights reserved.www.readinga-Photo Credits:Back cover:Joe Gill/Express-Times/Landov;title page:Mike Vogt/Idaho Press-Tri
35、bune/AP Images;page 3:Chitose Suzuki/AP Images;page 4:iStock/DebbiSmirnoff;page 6:Christies Images/Bridgeman Images;page 7:Michael Sullivan/The News-Review/AP Images;page 8:David Frazier/Corbis;page 10(top):Hubble data:NASA,ESA,and A.Zezas(Harvard-Smithsonian Center for Astrophysics);GALEX data:NASA
36、,JPL-Caltech,GALEX Team,J.Huchra et al.(Harvard-Smithsonian Center for Astrophysics);Spitzer data:NASA/JPL/Caltech/Harvard-Smithsonian Center for Astrophysics;page 10(bottom):Xinhua/Landov;page 12:Keystone Pictures USA/Alamy;pages 13,15:ZUMA Press,Inc/Alamy;page 14:Amy Snyder,Exploratorium,www.explo
37、ratorium.eduIllustration Credits:Pages 5,9,11:John Manders/Learning AZTitle page:On Pi Day,some people compete in a pi-throwing event.Page 3:Some students make themselves into pi on Pi Day.Back cover:Sometimes people get a choice of pies to eat on Pi Day.Written by Nora MillerCorrelationLEVEL RN3030
38、Fountas&PinnellReading RecoveryDRA1516After all that eating,some people work off their food by walking or running a pi marathon.These runs have distances of 3.14 miles(5.05 km)or 3.14 kilometers(1.95 mi.).Walking or running in a circle is also an option.Other people celebrate by decorating their roo
39、ms or themselves with pi-themed objects.They cut out the shape of and put it on walls and tables.Some people wear T-shirts with on them or-shaped jewelry.Mathematicians celebrate the number pi because it is useful and important for many mathematical and scientific projects.The rest of us can celebra
40、te Pi Day,too.It helps us remember that science can be fun as well as useful.Glossaryarea(n.)the amount of space that could cover the surface of a shape or region as measured in square units(p.8)calculate(v.)to work out or estimate an answer using mathematics(p.7)circumference the distance around th
41、e outside (n.)of a circle(p.5)decimal point the dot in a number such as 1.47 (n.)that indicates that the numbers to the right of it are tenths,hundredths,and so on(p.7)diameter(n.)the length of a straight line drawn through the center of a circle or a sphere from one side to the other(p.5)digits(n.)
42、the numerals from 0 to 9 that can be used to write any number(p.7)divided(v.)worked out a number by the process of division,in math;found how many times one number went into another number(p.5)pi(n.)a constant value that represents the ratio between the circumference and diameter of a circle(p.4)vol
43、ume(n.)the amount of space that something takes up as measured in cubic units(p.9)Some people like pi so much that they wear it.Pi Day Level R1314Some people like to start their celebration of Pi Day at 1:59 pm and 26 seconds.This marks the first eight digits of pi3.1415926!And once in each century,
44、theres a special Pi Day3-14-15.On that Pi Day,people can get“extra credit”for starting the celebration at 9:26 am and 53 seconds.This time adds two more digits to the celebration string 3.141592653.Whew!In 2009,the U.S.Congress voted to make March 14 National Pi Day.One representative who voted for
45、it said he hoped students would“discover that they really do like math and they really do like science.”How Do People Celebrate Pi Day?The first Pi Day was celebrated in 1988.An American scientist named Larry Shaw arranged for a huge celebration at the San Francisco Exploratorium.People marched arou
46、nd a circular room,sang songs,and ate pie.News stories about the celebration spread the idea to schools,museums,and communities.Eventually,Pi Day events were held all over the world.Many people celebrate Pi Day with family and friends.The most popular way to celebrate is by eating pi-themed foods.Ma
47、ny people make pizzas(round ones,of course)and bake fruit or cream pies.Some people even use a special pie pan shaped like the Greek letter .Those who are willing to go one step further drink pi-neapple juice,too.If all that food is too sweet,there are always dinner foods such as shepherds pie and c
48、hicken potpie.In 1988,Shaw led the parade,followed by people carrying the numbers of pi.In 2010,elementary school students in Florida made a pi chain with 5,904 links.Pi Day Level R34Table of ContentsIntroduction .4What Is Pi?.5A Day to CelebratePi Day!.12How Do People Celebrate Pi Day?.14Glossary .
49、16 IntroductionWhats your favorite kind of pie?Apple?Pumpkin?Lemon cream?If youre a mathematician or someone who uses math in your work,it might be something very different.Pi sounds just like pie,but its the name of a special number that allows people around the world to do many interesting things.
50、Pi Day Level R34Table of ContentsIntroduction .4What Is Pi?.5A Day to CelebratePi Day!.12How Do People Celebrate Pi Day?.14Glossary .16 IntroductionWhats your favorite kind of pie?Apple?Pumpkin?Lemon cream?If youre a mathematician or someone who uses math in your work,it might be something very diff