MSM07G6_RESBK_Ch04_061-068.pe
12/29/05
9:42 PM
Page 62
Name
Date
Class
Practice B
LESSON
4-8 Adding and Subtracting with Like Denominators
Subtract. Write each answer in simplest form.
4
18
10
2. 24
24
1. 1 7
3
7
1
3
11
2
5
4. 8
13
13
1
1
2
6. 2 17
3
9
5
7
14
4
6
7. 69 49
3
3
8. 711 611
9. 10 55
1
2
29
1
13
5. 5 34
31
3
8
2
3. 23 13
2
11
1
45
2
ᎏ
Evaluate each expression for x ᎏ
15 . Write each answer in
simplest form.
14
13
ᎏ
12. ᎏ
15 x
1
ᎏ
10. x ᎏ
15
11. x ᎏ1ᎏ
5
1
16
or 1
15
15
1
15
7
ᎏ
13. x ᎏ
15
11
15
3
5
Write each sum or difference in simplest form.
2
17
14. 21
21
9
13
15. 32
32
5
7
76
2
8
16. 1
5
15
11
16
26
14
17. 27
100
10 0
1
132
2
3
1
4
5
18. 15
15
15
9
2
5
19. 2
6
26
26
8
13
2
3
20. Maria has 8 gallons of paint she wants to use in three rooms
1
of her house. She will use 24 gallons in the bedroom and
1
14 gallons in the bathroom. Use pictures to model how many
gallons she will have left to paint the playroom, and then write
your answer in simplest form.
1
2
4 gallons
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MSM07G6_RESBK_Ch04_077-096
12/29/05
9:44 PM
Page 91
Puzzles, Twisters & Teasers
4-7 Celestial Fractions
Reading Strategies
4-7 Use a Graphic Aid
LESSON
LESSON
Your goal is to pull fractions out of the “sky.” Find the single
largest fraction and the single smallest fraction in the cloud
of fractions below.
A number line can help you compare fractions.
0 1 2 3 4 5 6 7 1
8 8 8 8 8 8 8
3 180
14 840
Use the number line and write , , or for each.
1
1. 8
5
8
5
2. 8
2
8
6
3. 8
3
8
4. When you compare two fractions with the same denominator, how you can tell
which one has the greater value?
5
7
315
840
A number line can help you compare fractions with different
denominators.
0
1
6
2
3
2
6
3
6
4
6
5
6. 6
5
9. 6
1
2
2
4
1
4
0
3
4
2
2
4
4
1
3
2
3
2
7. 3
1
10. 3
4
6
1
6
2
14. 8
He
S
H
U
F
3
4
3
12. 4
1
4
2
15. 4
7
8
1
13. 2
5
8
4
8
6
16. 8
1
2
59
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Holt Mathematics
4
2
8. 1 3
5
7
13. ᎏ8ᎏ x
12. x 8
7
8
2
1
3. 23 13
1
13
2
6. 2 17
3
14
5
7
3
9. 10 55
4
3
8. 711 611
1
11
1
1
14
ᎏ
10. x ᎏ
15
5
8
2
45
7
13
ᎏ
12. ᎏ
15 x
ᎏ
11. x ᎏ15
16
1
or 1
15
15
1
15
13. x ᎏ1ᎏ
5
11
15
3
5
Write each sum or difference in simplest form.
7
1
16. 9 9
17
2
14. 21
21
2
3
8
4
18. 11 11
13
9
15. 32
32
5
7
4
4
19. 1
2
12
4
11
3
4
Holt Mathematics
2
4
9
2
4
17. 8 8
21
W
ᎏ
Evaluate each expression for x ᎏ
15 . Write each answer in
simplest form.
Write each sum or difference in simplest form.
1
10
F
60
2
29
2
1
3
15. 9 9
3
A
1
5. 5 34
8
6
7. 69 49
Evaluate each expression for x ᎏ8ᎏ. Write each answer in
simplest form.
1
1
14. 2 2
7
F
9
313
3
34
1
8
S !
7
O
1
3
11
2
4. 813 51
3
1
9. 4 4
1
3
1
5
L
3
7
3
38
11. x 8
K
28
U
18
10
2. 24
24
1. 1 7
7
4
6. 48 18
1
2
5
8
8
H
L
Practice B
4-8 Adding and Subtracting with Like Denominators
1
7
5
2
5. 16 16
3
15
K
A
Subtract. Write each answer in simplest form.
1
5
1
12
6
S
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4
3
3. 7 7
7
5
2. 1
1
0
0
1
3
S when he W
LESSON
Subtract. Write each answer in simplest form.
3
5
E
14
S
12
L
Practice A
4-8 Adding and Subtracting with Like Denominators
10. x ᎏ8ᎏ
L
2
K
LESSON
1
7. 2 2
F
20
E
4
1
4. 9 9
630
840
How can you tell that your friend plays cards?
2
2
2 3 4 5 6
8 8 8 8 8
4
1
1. 5 5
3
4
Find the denominator of the smallest fraction and repeat the
process to find the second word.
Use the number line and write , , or .
3
11. 8
350
840
To solve the riddle, take the denominator of the largest fraction
as given and find it in the rectangle below. Record the letter
directly below that number in the first answer blank. Move
clockwise, skip the next letter, and write the letter that comes
after that in the next answer blank. Continue skipping and
listing letters until you have the eight letters of the first word.
1
5
6
2
3
3
3
3
8. 6
700
840
3
3
Use the number line and write , , or .
2
5. 6
5
12
4 160
21 840
5
6
690
840
23
28
560
840
2
3
7 392
15 840
greater value.
600
840
2 336
5 840
3 252
10 840
Sample answer: The fraction with the greater numerator has the
1
3
5 210
20 840
1 420
2 840
4
8
76
26
14
17. 27
100
100
2
3
2
8
16. 1
1
5
5
11
16
1
132
2
3
1
4
5
18. 1
1
5
5
15
9
2
5
19. 2
2
6
6
26
8
13
2
3
2
20. Betty read 3 of her book. Use pictures to model how much of her book
is left for her to read, and then write your answer in simplest form.
20. Maria has 8 gallons of paint she wants to use in three rooms
1
of her house. She will use 24 gallons in the bedroom and
1
14 gallons in the bathroom. Use pictures to model how many
gallons she will have left to paint the playroom, and then write
your answer in simplest form.
1
of the book
3
1
2
21. Sheera ate 5 of the pizza. Andre ate 5 of the same pizza. Use
pictures to model how much of the pizza was left over, and then
write your answer in simplest form.
1
2
4 gallons
2
of the pizza
5
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
61
Copyright © by Holt, Rinehart and Winston.
Holt Mathematics
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
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Holt Mathematics