6th Grade Math Textbook, Progress

(Marvins-Underground-K-12) #1
Find the missing term in each proportion.


  1. 
    1


n
2


2

5
0

 4. 
1

n
0

^3
5

 5. n
3


2

7
1

 6. ^6
5

^2
n

(^4) 



  1. ^4
    n



1
3

6
6
 8. ^2
n

^1
2

4
8

 9. ^1
4

(^2) ^1
n
8
 10. 
1
5
5

1
n
2




  1. 
    1


n
6


3
6

 12. 
n
9


5
9

 13.
n
7


6
2

 14. 
1
4

8
8


n
8



Find the value of n.


  1. 4 : 5n: 10 16. 6 : n3 : 9 17.n: 85 : 5

  2. 9 : 818 : n 19. n: 1218 : 9 20.13 : 5n: 15

  3. n: 60.4 : 12 22.9 : 42.7 : n 23.17 : 3n: 1.5


Select the two ratios that form a proportion.
Check by showing the cross products.


  1. ^1
    2
    , 
    1
    4
    , 
    2
    4
     25. 
    3
    5
    , 
    1


9
5
, 
6
9
 26.
2
3
, 
3
9
, 
1
3



  1. ^4
    6
    , 
    2
    5
    , 
    1


8
2
 28. 
5
8
, 
2
3

0
2
, 
1
1

5
6
 29.
1

3
0
, 
1

9
0
, 
3

9
0


Is the given value of nreasonable?
Explain your answer.


  1. ^3
    7



1

n
40

 No, 6 is not reasonable.

n 6


  1. 
    3
    6


3
0

4

n
0
 32. 
1

3
6

2
0

1
n
 33.
1
2

0
5

0
0

n
5
 34. 
3
n

5

0
0

.
.

2
4


n 30 0 n 5 0 n7.5 n 7 
1
2



3
7

1
2
so 
1

n
40
should be
1
2
.

8206-2_384-385 3/17/06 11:57 PM Page 385

Free download pdf