Fourth Grade Multistep Problems

[Pages:16] FourthGradeMath:WrittenResponse:MultiStepWordProblems

Objective:

? Studentswillbeabletouseaddition,subtractionandmultiplicationtosolvemulti- stepproblems.

? Studentswillwriteproblemresponsesincompletesentences. ? Studentswilllabeltheiranswersusingthecorrectunits. Standard: ? 4.1.1.5:Solvemulti-steprealworldandmathematicalproblemsrequiringtheuseof

addition,subtractionandmultiplicationofmulti-digitwholenumbers.Usevarious strategies,includingtherelationshipbetweenoperations,theuseoftechnology,andthe

contextoftheproblemtoassessthereasonablenessofresults. Materials:

? Pencils ? Markers ? Highlighters ? Problemsolvingsteps ? Picture/ProblemWorksheets ? Calculators

Motivation:

? Goodafternoon!Howiseveryonedoingtoday? o Good,okay,excited

? I'mgladtohearthat!IamhavingagooddaymyselfandIamreadytodosome learning.Lastweek,welookedatsomegraphsthatgaveusalotofgood information.Whatkindsofdatadidwelookat? o Bargraphs o Tables

? Whatinformationdidthebargraphsandtablesgiveus? o Exercisedogsneed o Heightofdogs o Howmuchdogscostinoneyear

? Yes,thoseareallthingsthedatatoldus.Whyisitgoodinformationforustoknow? o Ifsomeonewantsadog,theycostalotofmoney o Ifyouliveinasmallhome,youshouldn'tgetareallybigdog o Ifyoudonothaveenoughtimetoexerciseyourdog,youshouldnotget certaindogs

? Yes,thoseareallimportantthingstothinkaboutwhenwearechoosingadogtolive inourhomes.Thankyouforreviewingthelastlessonwesharedtogether.Next,I

haveaspeciallessonplan.Wehavealreadyworkedonsomestoryproblems,butI havesomenewoneIreallythinkyouaregoingtolike.Theyarealittlemoreofa challenge,butIhaveaspecialtooltohelpusfindthecorrectanswers. Procedure: ? ThefirstthingIwouldlikeustodotogetherisgooverourstoryproblemsolving steps.BeforeIshowyoumycopy,Iwouldliketoseeifyoucanrecallthemonyour own!Let'sseeifwecanworktogethertothinkofthesixsteps.

o Stepone:Readtheproblem,andreaditagain o Steptwo:Takenoteofallthenumbers o Stepthree:Statewhattheproblemislookingfor o Stepfour:Drawapicture,ifyouneedto,tohelpyouseetheproblem o Stepfive:Writeanumbersentence o Stepsix:checkyouranswer (Ifstudentsareunabletorecallthefivesteps,promptthemtowardsthecorrectanswers. Haveacopyofthestepstoshowthemonceyouhavediscussedallfive) ? Thankyou,thatwasverygoodteamwork.Nowwewillusethestepstohelpussolve somenewproblems.WewillbeginwithacoupleofproblemsIknowyoucansolve, andthenwewillmoveontoafewmoredifficultones.Eachproblemhasapictureto helpyouvisualizetheproblem. (Studentswillworktosolvethewordproblems15.Aftereachone,discusswiththestudents howtheyfoundtheiranswers,goingthrougheachstep,anddecideifitisreasonable) ? Thatwasverynicework!Now,wecanmoveontoafewdifficultproblems.Inorder tosolvetheseproblems,weneedtouseaddition,subtractionormultiplication. However,thenumbersareverylarge.Tohelpussolvethem,Ihavebroughtalong somecalculators.Haveyouusedacalculatorbefore? o Yes o No ? Tohelpusmakesureweusethemcorrectly,let'stryacoupleofsmallproblemsto testthemout.Pleasepunchintoyourcalculator:2x2=___.Whatdidyougetforan answer? o 4 ? Isthatthecorrectanswer? o Yes

? Verygood,wewilltryanotheroneforsomemorepractice.Pleasepunchintoyour calculator:24x3=____

? Whatdidyougetforananswer?

o 48

? Nicework!Ithinkwearereadytobeginsolvingourwordproblems.

(Ifstudentshavenotusedcalculatorsbefore,helpthemtodiscoverhowtheywork,wherethe buttonstheyneedarelocatedandtopunchinproblems.Ifstudentsgetthewrongnumber, helpthemtofigureouttheirerrorandhowtofixitforthenextproblem)

? Wewilldothefirstonetogether._______,pleasereadtheproblemforus.

o Makaylabought3booksaboutplantsand5booksaboutfish.Shealsobought 10sciencemagazines.Eachbookcost$18andeachmagazinecost$6.How muchdidMakaylaspendinall?

? Whatisourfirststep?

o Re-readtheproblem

? _______,pleasereadtheproblemthistime.

o Makaylabought3booksaboutplantsand5booksaboutfish.Shealsobought 10sciencemagazines.Eachbookcost$18andeachmagazinecost$6.How muchdidMakaylaspendinall?

? Verynicejob,andthankyouforreadingtheproblem.Whatisstepnumbertwo?

o Takenoteofallthenumbers o Shebought8booksfor$18.00eachand10magazinesfor$6.00each

? Thatiscorrect.Wealreadyhaveapictureforustolookat.Butwhatistheproblem asking?

o ItisaskinghowmuchMakaylaspentinall

? Howdoweusethenumberswehavetofindthatout?

o Putthemintoanumbersentence

? Let'sdothattogethernow.

o $18.00x3=____

o $10.00x6=____ o ____+____=? ? Nowusingourcalculators,wewillfindtheanswertoourquestion.Whatis18x3? o $18.00x3=$54.00 ? Whatis$10.00x6? o $10.00x6=$60.00 ? Weknowhowmuchthebooksandthemagazinescost.Howdowefindthetotal? o Addthemtogether o $54.00+$60.00=$144.00 ? Yes_______and________$144.00isthecorrectanswer.Nowlet'strysomemore problemsandputourcalculatorstogooduse!Donotforgettolabelyouranswers. (Fortheremainderofthelesson,followthesixstepstohelpstudentssolveasmanyofthe remainingquestionsaspossible.Expandtheirknowledgeofcalculatorsandhowtocheck theiranswers) Closure: ? Thankyouforyourhardworktoday,ourcalculatorsgotarealworkout.Whatis onethingyoulearnedtoday_______? o Howtousecalculators ? Yes,thankyou.______,whatdidyoulearntoday? o Calculatorscanhelpussolvemoredifficultproblems ? I'mgladyouenjoyedtoday'slesson.Pleasereturntoyourseatsandwaitforyour nextinstructions. InformalAssessment: ? Observation/Discussion ? Product:Problemworksheets;givenanswers FormalAssessment:

? None References:

? Problemsusedandadaptedfrom

In Marco's desk drawer there are 9 yellow highlighters. There are 6 more pink highlighters than yellow

highlighters, and there are 6 more blue highlighters than pink highlighters. How many highlighters are in Marco's

desk drawer in all?

In Marco's desk drawer there are 9 yellow highlighters. There are 6 more pink highlighters than yellow

highlighters, and there are 6 more blue highlighters than pink highlighters. How many highlighters are in Marco's

desk drawer in all?

Pedro had 21 stickers. He bought 16 more stickers from a store in the mall and got 10 more for his birthday. Then Pedro gave 10 of the stickers to his sister and used 12 to decorate a greeting card. How many stickers does Pedro have left?

Pedro had 21 stickers. He bought 16 more stickers from a

store in the mall and got 10 more for his birthday. Then

Pedro gave 10 of the stickers to his sister and used 12 to

decorate a greeting card. How many stickers does Pedro

have left?

Nelson needs 38 paper plates for a birthday party. He already has 20 blue plates and 10 red plates. How many

more plates should Nelson buy?

Nelson needs 38 paper plates for a birthday party. He already has 20 blue plates and 10 red plates. How many

more plates should Nelson buy?

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