CHAPTER

2 Whole Number Multiplication and Division

Lesson 2.1 Using a CalculatorUse your calculator in this lesson.

Add.

1. 3,85712,6845

2. 5,72912,8655

3. 1,89814,5735

4. 2,94814,6765

Subtract.

5. 4,21621,6785

6. 5,04221,8575

7. 26,111212,9355

8. 108,123215,9875

Multiply.

9. 2683945

10. 4793585

11. 1,5793485

12. 36,4503285

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Divide.

13. 6,356475

14. 6,344485

15. 2,6324475

16. 5,7964695

17. 15,6964365

18. 322,0774985

Use your calculator to solve this question.

19. Step 1 Writeanywholenumberbetween100and999.Step 2 Multiplythenumberby11.Step 3 Thenmultiplytheproductby91.

RepeatthethreestepsbychoosinganothernumberinStep1.Whatdoyounoticeabouttheanswers?

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Chapter 2 Lesson 2.1

Lesson 2.2 Multiplying by Tens, Hundreds, or ThousandsMultiply.

1. 383105 2. 7463105

3. 6243105 4. 8573105

5. 7583105 6. 6803105

Find the missing factors.

7. 6813 56,810

8. 31051,900

9. 4533 54,530

10. 1,9053 519,050

11. 310564,000

12. 3105808,000

Fill in the blanks.

13. 563805(563 )310

5 310

5

14. 7563405(7563 )310

5 310

5

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15. 6803505(6803 )310

5 310

5

16. 8573605( 3 )310

5 310

5

Multiply.

17. 38340 18. 572380

19. 490330 20. 375370

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Chapter 2 Lesson 2.2

Multiply.

21. 4731005 22. 32531005

23. 16831005 24. 23131,0005

25. 19231,0005 26. 75931,0005

Fill in the blanks.

27. 3863 538,600

28. 31005712,000

29. 6233 5623,000

30. 8163 581,600

31. 31,00057,910,000

32. 31,00055,200,000

Fill in the blanks.

33. 2436005(243 )3100

5 3100

5

34. 10834005(1083 )3100

5 3100

5

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35. 16035005(1603 )3100

5 3100

5

36. 3733,0005(373 )31,000

5 31,000

5

37. 10338,0005(1033 )31,000

5 31,000

5

38. 32534,0005(3253 )31,000

5 31,000

5

Multiply.

39. 2093700 40. 1463 9,000

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Chapter 2 Lesson 2.2

Lesson 2.3 Multiplying by Powers of TenMultiply.

1. 953105

9531025 3

5

9531035 3

5

2. 863105

8631025 3

5

8631035 3

5

3. 4533105

45331025 3

5

45331035 3

5

4. 1283105

12831025 3

5

12831035 3

5

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5. 6,2503105

6,25031025 3

5

6,25031035 3

5

6. 9,3603105

9,36031025 3

5

9,36031035 3

5

7. 248335 8. 347355

2483305 3473505

9. 137345 10. 564385

13734005 56438005

11. 526365 12. 196395

52636,0005 19639,0005

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Chapter 2 Lesson 2.3

Lesson 2.4 Multiplying by 2-Digit NumbersMultiply. Estimate to check if your answers are reasonable.

1. 46380 2. 53390

3. 49346 4. 58352

5. 37363 6. 65347

7. 86343 8. 96384

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Multiply. Estimate to check if your answers are reasonable.

9. 763340 10. 370360

11. 495327 12. 856356

13. 1,268339 14. 1,046393

15. 1,203378 16. 3,108324

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Chapter 2 Lesson 2.4

Lesson 2.5 Dividing by Tens, Hundreds, or ThousandsDivide.

1. 7,2004105 2. 2,8004105

3. 23,0004105 4. 680,0004105

Fill in the blanks.

5. 2,3204105

6. 4105160

7. 24,0004 52,400

8. 84,0004 58,400

9. 4105398

10. 41055,500

Fill in the blanks.

11. 9,3004305(9,3004 )43

5 43

5

12. 9,5004505(9,500410)4

5 4

5

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13. 126,0004605(126,000410)4

5 4

5

Divide.

14. 60,000440 15. 372,000460

16. 486,000490 17. 267,400470

Divide.

18. 4,80041005

19. 35,70041005

20. 79,00041,0005

21. 350,00041,0005

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Chapter 2 Lesson 2.5

Fill in the blanks.

22. 19,20041005

23. 410052,750

24. 77,0004 5770

25. 930,0004 5930

26. 41,0005514

27. 410056,800

Fill in the blanks.

28. 13,50043005(13,5004 )43

5 43

5

29. 85,00045005(85,0004100)4

5 4

5

30. 840,00044005(840,0004 )44

5 44

5

31. 924,00046,0005(924,0004 )46

5 46

5

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32. 981,00049,0005(981,00041,000)4

5 4

5

33. 756,00047,0005(756,0004 )47

5 47

5

Divide.

34. 12,4004400

35. 456,00043,000

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Chapter 2 Lesson 2.5

Lesson 2.6 Dividing by 2-Digit NumbersDivide.

1. 80420 2. 100418

3. 130443 4. 620452

5. 198423 6. 240434

7. 624429 8. 831445

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Estimate the quotient. Then divide.

9. 3,160440 10. 3,250450

11. 2,566424 12. 3,129438

13. 4,163442 14. 1,986451

15. 1,300449 16. 1,170461

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Chapter 2 Lesson 2.6

Lesson 2.7 Order of OperationsFind the value of each expression. Record each step.

1. 602201705

Step 1

Step 2

2. 20045375

Step 1

Step 2

3. 1002135431275

Step 1

Step 2

Step 3

4. 801108493105

Step 1

Step 2

Step 3

5. 42310272485

Step 1

Step 2

Step 3

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Find the value of each expression. Record each step.

6. 903(38218)41005

Step 1

Step 2

Step 3

7. (10028042)215345

Step 1

Step 2

Step 3

Step 4

Find the value of each expression.

8. 148152298

9. 5002165187

10. 363849

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Chapter 2 Lesson 2.7

11 . 9734735

12. 30021238

13. 156171244

14. 494739230

15. 2936215043

16. 43(18132)410

17. 1804(60255)1(19117)37

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18. 281(140256)462(80239)

19. (619)3[(120290)29]47

20. 240482[322(140268)49]

Find the value of each expression. State the order of operations.

Expression Order

21. 3433465 34

22. 184127335

23. 100268137345

24. 1934184465

25. 714738442285

26. 302(45217)5

27. 73(14126)485

28. (73127)2136445

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Chapter 2 Lesson 2.7

Lesson 2.8 Real-World Problems: Multiplication and Division

Solve. Show your work.

1. Afruitsellerbuys1,456applesandpacksthemequallyintoboxesof56each.Hesellseachboxfor$18.Howmuchmoneydoeshecollectifhesellsalltheapples?

2. Mrs.Brandonhad230softtoys.Shekept50softtoysanddistributedtherestequallyto15childrentosellforcharity.Eachtoywassoldfor$20.Howmuchmoneydideachchildcollect?

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3. Thereare641boysand490girlsinGreenlandSchool.Eachchildmakes8artpiecesforclassroomdecorations.Alltheartpiecesarethendistributedequallyamong58classrooms.Howmanyartpiecesareineachclassroom?

4. Tinacollects487seashellsandWaynecollects345.Aftergiving40seashellstoCalvin,theyputtheremainderequallyinto36boxes.Howmanyseashellsareineachbox?

5. Thetableshowsthebookingfeeforatenniscourtinacommunityclub.

From9a.m.to5p.m. $4perhour

After5p.m. $7perhour

Edwinbookedthetenniscourtfrom4p.m.to8p.m.HowmuchdidEdwinpayforthetenniscourt?

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Chapter 2 Lesson 2.8

6. ThreetimesasmanychildrenasadultsattendedaconcertonSaturday.Anadult’sticketcost$7andachild’sticketcost$3.Thetheatercollectedatotalof$6,000.Howmanypeopleboughttickets?

7. Mrs.Danielpays$324forahandbagand3pairsofshoes.Thehandbagcostshalfasmuchasthe3pairsofshoescombined.Findthecostofthehandbag.

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8. Mr.Jacobis55yearsoldandTonyis7yearsold.InhowmanyyearswillMr.Jacobbe4timesasoldasTony?

9. Thecostof5similardigitalcamerasand3similarvideocamerasis$3,213.Eachvideocameracosts4timesasmuchaseachdigitalcamera.Johnbuysadigitalcameraandavideocamera.Howmuchdoeshepay?

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Chapter 2 Lesson 2.8

10. Anne,RyanandJoelcollectemptycansforrecycling.Theycollectatotalof1,925cans.AnnecollectshalfasmanycansasRyan.JoelcollectstwiceasmanycansasRyan.HowmanycansdoesJoelcollect?

11. DavidandJosephhaveatotalof328marbles.MatthewandDavidhave176marbles.Josephhas5timesasmanymarblesasMatthew.HowmanymarblesdoesDavidhave?

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12. Thelibraryhasatotalcollectionof2,630books.Thenumberofnon-fictionbooksis240fewerthanthenumberoffictionbooksbut190morethanthenumberofpicturebooks.Howmanybooksofeachtypeareinthelibrary?

13. Thetotallengthof4bluebannersand5yellowbannersis49meters.Thetotallengthof2bluebannersand1yellowbanneris17meters.Allbannersofthesamecolorhavethesamelength.Findthelengthofeachbluebanner.

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Chapter 2 Lesson 2.8

14. Atthelocalclothingstore,3similarshirtsand4similarjacketscost$360,and1shirtand3jacketscost$220.Findthecostofeachshirt.

15. Jamesboughtafewhamsters.Foreachdayafterthefirstdayoftheweek,thehamstersate20gramsoffoodmorethanthepreviousday.Thehamstersgrewfast,finishing1,260gramsoffoodinthefirstweek.Howmuchfooddidthehamsterseatonthefirstday?

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16. Annhad$198morethanhersister.AftertheirmothergaveAnn$20andhersister$60,Annhadtwiceasmuchmoneyashersister.HowmuchmoneydidAnnhaveatfirst?

17. Therewere7timesasmanymarblesinboxAasinboxB.AfterJoycetransferred294marblesfromboxAtoboxB,bothboxeshadthesamenumberofmarbles.HowmanymarbleswereinboxAatfirst?

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Chapter 2 Lesson 2.8

Put on Your Thinking Cap!

Solve. Show your work.

1. Inamathematicsquiz,20problemsaregiven.5pointsaregivenforeachcorrectanswerand2pointsaredeductedforeachincorrectanswer.Ashleyscores51points.Howmanycorrectanswersdoesshehave?

2. Theproductoftwoconsecutiveevennumbersis624.Whatisthegreaternumber?(Consecutiveevennumbersareevennumbersplacedoneafteranotherinanunbrokensequence.Forexample,2,4,6,8or10,12,14.)

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3. Useacalculatortomultiply.

243115

353115

723115

693115

583115

763115

Whatdoyounoticeabouttheanswers?Findashortcuttotheanswerswithoutusingacalculator.

4. AaronandBengahaveatotalof976tradingcards.Bengahas7timesasmanycardsasAaron.HowmanycardsshouldBengagiveAaronsothatAaronwillhave3timesasmanycardsasBenga?

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Chapter 2 Put on Your Thinking Cap!

5. Therewere149angelfishandgoldfishinanaquarium.Thereweretwiceasmanyguppiesasangelfish.Afterselling35goldfish,therearehalfasmanygoldfishasangelfish.Howmanyfishareleftintheaquarium?

6. Sophiabuysanequalnumberoforangesandpearsforaparty.Thepriceoforangesis7for$2andthepriceofpearsis5for$3.Shepays$33moreforthepearsthanfortheoranges.

a. HowmuchdoesSophiapayinall?

b. Howmanyorangesandpearsdoesshebuyaltogether?

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7. MaritandJenniferhadanequalnumberofcrackers.Eachday,Maritate12crackersandJenniferate6morecrackersthanMarit.WhenJenniferhad24crackersleft,Marithad96crackersleft.Howmanycrackersdideachofthemhaveatfirst?

8. RobertandDamienhadthesameamountofmoney.Eachday,Robertspent$4andDamienspent$6.WhenDamienhad$12left,Roberthad4timesasmuchmoneyleftasDamien.Howmuchmoneydideachboyhaveatfirst?

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Chapter 2 Put on Your Thinking Cap!

9. Forevery5highlightersthatAgnesbuys,shegets1free.IfAgnesneeds80highlighters,whatistheleastnumberofhighlightersshehastobuy?

10. Benitahasthreeropesmeasuring54centimeters,108centimeters,and189centimeters.Shecutsallofthemintoequalpieces.Thelengthofeachpieceisthelongestpossiblelengthshecancut.

a. Whatisthelengthofeachpieceofcutrope?

b. HowmanypiecesofcutropedoesBenitaget?

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11. Jessicaandhermotherreturnfromshoppingwith14packages.Theyparkthecarintheparkinglot,whichis120metersawayfromtheirhouse.Thentheymakeseveraltripstobringthepackagesintotheirhouse.Jessica’smothercancarry3packagesatatimeandJessicacancarry2.Giventhattheyalwayswalktogetherandtheleastpossiblenumberoftripsismade,findthetotaldistancecoveredbybothofthem.

12. Formthegreatestandleastpossibleproductsbyfillingineachboxwithoneofthesedigits:

2 3 4 5 6

Foreachproduct,useeachdigitonlyonce.

Greatest Product

3 3

Least Product

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Chapter 2 Put on Your Thinking Cap!