Chapter 5 Support File Answers - scarsdaleschools.k12.ny.us

[Pages:65]Chapter 5 Support File Answers

Practice 5-1

1. 2. 3. 4. 5. 6. 7.

8. 9. 10. 11. 12. 13.

14. 15. 16. 21 17. 96 18. 150

19. 18a3bc 20. 84x2y2 21. 144 22. 432

23. down; 358 . 312

24. yes; 223 , 234

25.

21,

23,

3 4

26.

13,

25,

37,

4 9

27.

181,

34,

78,

9 10

Practice 5-2

1.

2 5

2.

3 4

3.

4 25

4. 21570

5.

9 100

6. 845

7. 0.85 8. 0.875 9. 0.5625 10. 3.125

11. 6.28125 12. 2.696 13. 0.52 14. 4.62

15. 20.583 16. 0.4 17. 0.27 18. 1.36

19.

130,

0.4,

21,

3 5

20. 234, 0.6, 0.38, 238

21.

215,

0.2,

41,

2 5

22.

97 5

5

1925

5

19.4

23. 10970

24. 31215

25. 24131

26.

9 100

27.

3 8

28.

241 990

29. 30. 31. 32. 33. 34.

Practice 5-3

1.

5 6

2.

3 8

3. 127

4. 21130

5. 2112

6. 9274

7.

8x 15

8.

7n 30

9.

1 3

10. 535

11.

1 2

12.

4 5y

13. 1156 14. 21230 15. 6172 16. 231112

17. 678 18. 11 19. 141156 20. 1115 21. 11

22. 30

23. 56

24. 100

25. 212530

26.

61 126

27.

15 28

28.

20 33

29. 62645

30.

23 36

Practice 5-4

1.

4 5

2. 2154

3.

7 16

4. 1

5. 10

6. 212

7. 412

8. 313

9.

2 5

10. 223

11.

6 35

12.

1 3

13.

14 39

14. 21112

15. 2419

16. 21125

17. 2914

18.

3x 14

19.

3 8

20.

27t 68

21. 814 cups

22. 418 chapters

23. 15 sheets

Practice 5-5

1. 10 2. 9 3. 20 4. 1200 5. 212 6. 212 7. 114 8. 5 9. 18 10. 112 11. A glass of milk holds about 8 fl oz. 12. A newborn weighs about 712 lb. 13. Reasonable 14. ton; A whale is very heavy. 15. cup; Cookies have about a cup

of sugar. 16. inch; A mouse is small 17. capac-

ity 18. length 19. weight 20. length

Practice 5-6

1. March 5 2. 9 records per hour 3. page 198 4. 56F 5.a. 7 b. 31 c. 5 d. 3 e. 17

Practice 5-7

1. 21190

2. 1230

3.

14 15

4. 412

5.

1 4

6.

4 5

7. 359

8.

5 24

9. 259

10. 2136

11. 1113

12. 716

13. 538

14. 14112

15. 2170

16.

7 12

17. 734

18. 41112

19.

2 7

20.

7 9

21.

2 9

22.

2 5

23. h 1 3172 5 2116; h 5 17172 ft

24. h 1 134 5 614; h 5 412 ft

Practice 5-8

1.

x

5

3 4

2. p 5 234

3. k 5 2113

4.

h

5

4 5

5.

e

5

1 48

6. m 5 2423

7. p 5 229

8. w 5 1111

9. x 5 0

10. m 5 313

11.

c

5

2 15

12. k 5 2110

13. y 5 7

14.

f

5

8 15

15.

n

5

1 5

16. c 5 113

17. d 5 6

18. y 5 20

19. h 5 218 20. k 5 2123 21. 123m 5 2212;

m 5 1312 pages 22. 3x 5 156; x 5 52 mi/h

Practice 5-9

1.

25 36

2.

16 81

3.

x6 125

4. 8x3

5. 9y4

6. 125a3b6

7. 144m2n2 8. 1,000x3y9 9. 729q3r3s12

10.

4x2 81y2

11. a6b6

12. 16a12b8

13.

4x2 y2

14.

9x2 64y2

15.

27y6 x3

16.

32x5 y10

17. 64

18. 2

19. 1

20. 16

21.

4 9

22. 1

23. 5

24. 4

25. 3 26. 2 27. (4a2)2 5 16a4

28. (3z5)3 5 27z15

Reteaching 5-1

1.

4 18

.

3 18

2.

5 8

,

6 8

3. 246 . 256

4. 2158 , 2148

5.

21 36

,

22 36

6.

39 60

,

44 60

7. 22420 5 22420

8.

6 25

.

5 25

9.

15 28

,

16 28

10.

35 63

.

33 63

11.

15 51

5

15 51

12. 22650 . 22660

Reteaching 5-2

1. 0.636363 . . . , 63.6363 . . . , 0.636363 . . . ,63, 9693,

7 11

2. 0.83333 . . . , 83.3333 . . . , 8.3333 . . ., 75, 7950,

? Prentice-Hall, Inc. All rights reserved.

Answers

37

Pre-Algebra Chapter 5

Chapter 5 Support File Answers (continued)

5 6

3. 11138

4.

19 33

5. 41101

6. 2145

Reteaching 5-3

1. 2180 2 1110 5 1170 2. 4182 2 21112 5 32102 2 21112 5 1192 5 134 3. 5128 2 21158 5 42108 2 21158 5 2158 4. 7340 2 12310 5 63340 2 12310 5 51330 5. 1178 6. 31145

7. 31492

8.

23 36

9. 5154

10.

11 24

11.

34 45

12. 134

13.

1 4

14. 249

Reteaching 5-4

1.

1 3

2. 2225

3. 21013

4. 24

5. 2112

6.

1 2

7. 225 8. 2258

Reteaching 5-5

1. 112 2. 312 3. 114 4. 212 5. 25 6. 38 8. 5 9. 4,800 10. 334 11. 278 12. 214

7. 10

Reteaching 5-6

1.a. $3

b. $4

c. $8

d. $15

2. $44

3.

1 8

of

the pie

Reteaching 5-7

1.

h

5

1 8

2.

e

5

1 2

3. m 5 21136

4. p 5 7

5. x 5 1178 6. y 5 2116 7. k 5 2334

8. n 5 1170 9. f 5 22214 10. b 5 23345

Reteaching 5-8

1. x 5 112

2. x 5 112

3.

y

5

5 12

4. h 5 2121

5. j 5 6

6. p 5 278

7.

m

5

3 5

8. n 5 2445

9. x 5 114 10. k 5 2212

Reteaching 5-9

1. 10,000 2. 216 3. 16x2 4. a10b5

5. 9a2b6

6. 125m6n9

7.

4 81

8.

49 64

9. 21,20700

10.

16 x8

11.

27x3 125

12.

a8 b20

13.

x5y10 32z15

14.

1 16n12

15.

4r6s2 9t4

16. 2a62b73c6

18.

x8y4z12 16

19.

25 j6k2

20.

a3c12 64b3

17. p12q9r6

Enrichment 5-1

START ?15 16

?1

?31

?7

32

8

?2

?0.3

?8

?3

?0.9

7

9

4

?5

?4

?1

?1

?0.4

?1

?2

16

15

4

3

2

3

?6

?0.3

?6

?5

?2

17

25

19

3

?2 5

?9

?1

20

4

?0.3

?1 5

?7 27

?0.26

11 40

0.27

3 20

2 11

0.21

1 4

7

13

25

50

1 7

2

4

5

11

15

17

3 10

FINISH

Enrichment 5-2

1. 0.94 2. 0.27 3. 0.254 4. 0.24 5. 0.4 6. 7.138 7. 0.4 8. 0.7 9. 0.2 10. 0.5 11. 0.8 12. 0.8 13. 0.37 14. 0.82 15. 0.05 16. 0.61 17. 0.47 18. 0.47 19. 0.571 20. 0.007 21. 0.365 22. 0.998 23. 0.135 24. 0.135 25. 0.08705

Enrichment 5-3

Sample answers are shown.

1.

1 2

1

1 6

1

1 21

2.

1 2

1

16,

1 3

1

1 4

1

1 12

3.

1 3

1

16,

1 4

1

1 8

1

1 12

1

1 24

4.

1 2

1

1 4

1

18,

1 2

1

1 3

1

1 24

5.

1 4

1

1 9

1

118,

1 3

1

1 12

6.

1 3

1

14,

1 2

1

1 12

Enrichment 5-4

1.

3 5

2.

13 45

3.

12 29

4.

350 1,807

7.

4

1

1 1

21

1 3

8.

61

1 1

21

1 5

5.

5

1 1

1 6

6.

8

1 1

1 5

Enrichment 5-5

1. 2314, 3813; 3313, 2513; 3612, 10923; 7214, 10413; 8316, 9123; 1523, 4913; 1734, 23; 19152, 29; 3656, 7713; 3116, 2613 2. Sample answer: The larger units are more appropriate, but the people at American Forests probably wanted to avoid fractions.

? Prentice-Hall, Inc. All rights reserved.

Pre-Algebra Chapter 5

38

Chapter 5 Support File Answers (continued)

Enrichment 5-6

1. 1176

2. 158

3.

3 16

4.

7 16

5.

3 16

6.

7 8

7.

5 16

and

3 8

b. 112 and 1196

c. 11156 and 2

d.

13 16

and

7 8

8. 12332

9.

5 32

10.

15 32

11.

9 32

12. 1392

13.

1 32

Enrichment 5-7

1. h 1 6,194 5 29,028; h 5 22,834 ft 2. 2254

3. 1154

4. 1115

5. 2154

6. 2356

7.

5 8

8. 21430

9. 211230

10. 221178

11. 10230

12. 11214

13.

25 42

14. 2117

15.

7 48

ACONCAGUA ARGENTINA

Enrichment 5-8

1.

1 2

s,

1 2

s, 1 s, 2 s

2.

1 4

s,

1 4

s,

1 8

s,

1 8

s,

1 8

s,

1 8

s,

1

s,

2

s

3.a.

3 4

s

b. 3 s

4.

1 4

s,

1 2

s,

3 8

s,

112

s,

3 32

s,

3 4

s

Enrichment 5-9

1.a. 64 b. 64 c. 43 5 26 2.a. 6,561 b. 6,561 c. 94 5 38 3. 43 5 (22)3 5 26 4. 94 5 (32)4 5 38 5. 211 6. 310 7. 212 8. 67 9. 313 10. 218 11. 222 12. 510 13. 229 14. 318 15. 713 16. 1017 17. 341 18. 249

Checkpoint 1

1. 112 2. 200 3. 77 4. 5. 6.

7. 1.6

8.

2 3

9. 0.27

10. D

Checkpoint 2

1. 2154 2. 6 3. 712 4. 7,500

y

5

1 4

7. t 5 212

8. x 5 2115

11 ft from the center line

5. 114 ft 6.

9.

k

5

8 11

10.

Assessment Form A

1. D 2. G 3. A 4. F 5. D 6. G 7. C

8. H

9. D

10. G

11.

12.

13.

5 11

14. 0.583 15. x 5 21134 16. t 5 1218

17. n 5 21214 18. 114 19. 26 20. 16x2

21.

27m3 8n3

22. x3y6

23. 23c 5 54; c 5 81 coins

24. 20 puppies 25. Sample answer: A baby lost

3 4

lb

in

the

week

after

it

was

born.

At

the

end

of

the week it weighed 634 lb. What was its birth weight?

Assessment Form B

1. A 2. F 3. C 4. H 5. C 6. G 7. D

8. F

9. B

10. J

11.

12.

13.

8 9

14. 0.46

15.

x5

7 15

16. y 5 114

17. z 5 2512

18.

3 4

19. 6

20. 125x3

21.

49m2 81n2

22. x10y5 23. 1130m 5 195; m 5 150 months

24. 12

25.

Sample

answer:

Thomas

runs

3 4

mi

a

day. How many days will it take him to run a total

of 6 mi?

Alternative Assessment

1. Answer is incorrect; find the LCM of 9 and 3;

multiply

1 3

by

33;

then

add

249

1

39. The

correct

answer is 219

2.

Multiply

each

amount

by

1 2

or

divide each amount by 2. 3. Sample answer: Lisa

and George bought a pizza with 15 equal pieces.

George

ate

1 3

of

the

pizza

and

together

they

ate

35.

How

much

did

Lisa

eat?

Lisa

ate

4 15

of

the

pizza.

4.a. 416 b. 1.27 c. cm to m; It is easier to divide

by 100 than 12.

5. (ab)5 5 (ab)(ab)(ab)(ab)(ab)

5 a ? a ? a ? a ? a ? b ? b ? b ? b ? b 5 a5b5

Cumulative Review

1. D 2. G 3. A 4. H 5. D 6. H 7. 1254

8. 2158

9. 31670

10. 42

11. 214

12.

11 20

13.

2 15

14. 2645

15. 100

16.

6 7

17. 36k2

18.

x4 81

19.

8m3 n6

20. 821, 2423, 7229; Sample answer: Start

with

2

and

multiply

by

1 3

repeatedly.

? Prentice-Hall, Inc. All rights reserved.

Answers

39

Pre-Algebra Chapter 5

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