II. Don bought shirts lor the lewis and Oar1l
25. P'8I1< rangers are culling 9-klot lengths oj
rope.. HowITI3fly Ieogthscan they make from 781eet of rope?
132 Chapter 5 Chapter ReviewfreSl
Show YIHl Undentand wtlefldividing. as the dMsor becomes greater why ooes the quotioot become less?
Extra Practice
Set An.-> 1.w. "0-111)
Oivide. Use menIal math.
1.240 .... 4 4.2.100 ... 30 7. 720,000 ... 800
Set B ~2.pp. \12-1131 Divide. Cheek yo..., answer.
2.560 .... 80 5. 16.000 ... 200 8.450,000 ... 500
3.9.000'" 10 6. 64.000 ... 800
1.22)53 5.840'" 42
2.32)98
6.727'" 42 7.496+61 8. 245 ... 22
Set C (\..->n4. IlP_ 118-1191
Divide. Cheek your answer.
1.68J201 5.58)264 ll.26}514
Set 0 (\..->n5. pp. 120-121)
Divide.
2.74}294 3.47)338 4. 89}566
e. 38h83 7.22)433 8. 39)707
10. 42}803 11.27)628 12. 29}415
... ... ...
1.24)7.252
$. 63)25,864
Set E n.-6,pp, 12...'261 Simplify.
2. 46Jl:2B6 6.26)14,610
3.62IT:406 7.82}46,613
4. 19J7.365 8. 65}23,486
1. (15+6)-8
4. (72-3)-(16+4)~
7,8+(11-7)+42
2.7+(24+6)xa
5. (36- 9) - (9 - 4)2 ... (6 x 7) 8. 2.550 - (69 - 64) x 500
3. (7 x 4) ... z2
6.(~+7)+(20+5)
8. (106 +- 12) ... 33 Chapter 5 ExIra Practice 133
Hear1beate petMinu'" (al ~etJ
""'" ... '" • GrouldH...iogbirdSQuirTel ""
""
"- " MOOM ""
e.roblem Solving I
Use the data In the chart to sotve Problems 1-5.
o
o
o
o
o
How many limes does a ground squirrel's hearl beal in 1hour? (Hint: 60 minutes .. 1hour) To find lhe number of heartbeats in IS seconds, divOe lhe number of beats per minute by 4.
How many limes does a hummingbird's heart beal in 15 seconds?
When a hummingbird is excited, its hearl rale may increase10 1.260beats per minute, About how many ~mes faster is lhatlhan yom heartbeat?
In 15 minules. the hearl of one of Ihe animals IiSled in the chart will beal 9,750 times. Which animal is il?
A scien~stused special equipment to mooitor a polar bear's resting heart ,ale. The equipment registe,ed 1.150heartbeats.Fa,how loog did the scienlisl monitor lhe poIa, bear's heart rate?
EducationPlace
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ont1UStopic.
Enrichment
Your school is ceIebnlting its 25th annil/efsary.
Using 365 days peryear,)'OIl lind that 9,131 days haYepassed since your school fifst opened, How canyou use the Distributive Property toc:l1eck
your multiplication?
365 n.. ' -bMI'IllloIP
x 25 ,...cleddl~
1825 9,125
730 ... 6
- -9,125 -9,131
You can use 1I 1.JlK'-'tIIble,ullMf 1I~r.m.
Write eadllaetor in ~ form .,w;I multiply::
25 )( 365 - (20 + 5) x (300 + 60 + 5}.
.. .. ,
m 20 x 300 _ 6.000 2Ox80_I200 2OxS_l00
, S. 300 _ 1.500 S x 80_ .. SxS_ "
.. .. ,
m , 20 x 300 _ 6,000 20.80_ 1200 2OxS_100 , ...
S x 300 _ 1,500 S x 80_ .. SxS_ " ... 1,825
7,500 ... 1.500 ... '" . 9,125
Notice that by adding IICf'OS$aod then down you get the same litlm aswhen you add down lind then across.
Show ho'II' toUN the D1l1trlbUtlve Property to aoll/8 each problem.
o Daniel's latheJ eams $28 per hour.
He wor1l.s 35 hours each week.
Roo how much Daniel's father eams in one week.
136 Unil2 Enrichment
e Heather'smother is 38 years oklo Roo how many days okl she is.
There have been 9 leap years since she was born.
Tic-Tac-Toe
~ with • partnet"andtryto be the flm 10get .. In • row!
Howto Play.
1. Copy!hegame board shownbellM.
...icat:ioII Tic- T8c.T_
" " " ..
'"
'"
'"
'"
2. Decide who will beX's and who will beO's.
3. The first player chooses 8 number from Ihe lOP and a number from theside and estimates their product The player then finds the actual product using II calculator.
4. If the dif'ereoce betweeo the estimate and the actual prodlJCl.
is less than 500. lhefirst player me"", their !eller in the 00x where the column and IT1N meet. IIthe difference isgreater than 500.!hesecood pl3yef marks their Iener in !he box.
5. Players take toms until one playergets 4 in aIT1N horilonlally.
vertically. or diagooally.
Now, try DMtIIonnc-lac-Toe. Estimatethe quotient,then use the ..;J key to chedt.
",no
"
"
"
"
Unit 2 TechoologyTme 137
.e Unit 2 Test
VOCABULARY
I. When you multipfy 25 x 28.you get the • 200 lind 500. ~you then IIdc:IIO flrld the product 2. "one numberdivides imo anotherwith
a remainderof O. the mmbers arecalled •.
;J.. Y Ol.lU$l! • tosimplifyapo IJIIS with more than one operation.
CONCEPTS AND SKIUS
Evaluate. Tell which property you used.~:II
4. (57 )( fit x 25. giYen n ..4 S. 4 )( 40 x a, given a "" 1 .. Show how to usethe DislribulNe Property10lind the pmdud
8 x 53. Show your~
Vocabulary
... ~
P'C$I ty
-- _ _. II., ... -. ..
~"l~ C~
Andthe proollC!.~:lj
7,432x7
EaUmale.lCJ>opln~I
11.69 x 83 11. 705 + 9
8.86)(67
10.79 x 318 12.1.452 + 7 Use meRUIt math to solve each equatlon.~~
13.7n-56 14.64+n-a
Divide. Chedt your an_.~"
115.1.705 + 3 1•. 1.080+ 16
DivIde.us. mental matto.~"
11.4.900 + 70 , .. &4.000 + 800
138
Simplify.~51
,',9 x9 - 6 + 2 + 1 2O.(7x5)-41 -(1I +8) 21.(3+4)2_(4+3)
Open Response
PROBLEM SOLVING
22. Eric. Fran. Greg. and Hannah each have a different color pencil: red. yel- low. gray.Of brown. Fran's pencil is not
red or yellow. Greg'S pencil is brown.
Hannah's pencil is not yellow. What color is each student's pencil?
24. A group of59 students signed lJP to go on a field trip. Each minivan holds 1 driver and 7 student passengers.
How many minivans will be needed?
23. Theresa spent $45 on refreshments for the fifth-grade class party. She paid for the refreshments using $10. $5. and
$1 bills. She received no change. If Theresa gave the cashier 10 bills in all.
how many of each bill did she use?
25. Ashipment of300 math books came in boxes. Each box. except one. held
24 books. How many books were in the carton that did not hold 24 books?
Performance Assessment
Extended Respome
Task Mitchell has saved $400. He would like to usesome of the money to buy clothes while they are00 sale.
Use the advertisement aboVe and the information at the right. What can Mitchell buy? Explain your thinking.
lnfonnatlon VOlJ Need
• Mitchell wants to spend onlyhall ottha moneyha'ssaved al the clothing sala.
• He wantsto buyat laasl one of each 1y?e01 clothing that ison sala.
• He wants no mo<a Itlan SSillchange lorthe entire purchase.