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WRITING RATIOS #4--KEY

Directions: Write the correct ratios for each situation below.  Write your ratio in three different ways: using words (3 reds to 12 total marbles), using a colon (3:12), and as a fraction (3/12).

 3

5

6

6

8

4

2

8

9

4

3

8

1)	 Prime #’s to Circles  	2)  Composite #’s to Pentagons    3)  Factors of 8 to Total 	4)  3’s to Squares	 

     4 to 8   	                                             8 to 3                                        6 to 12                           2 to 1            
              
 4:8 or 1:2			                      8:3		                6:12 or 1:2                           2:1                   

       4/8 or 1/2		                                 8/3		               6/12 or 1/2                            2/1                      
       
5)	 4’s to Multiples of 2        6)  Pentagons to Odd #’s   	      7)  Factors of 7 to Total 	8)  5’s to Even # Circles	
     2 to 8   	                                     3 to 4                                                 0 to 12                             1 to 6                           

 2:8 or 1:4			              3:4		                                    0:12                                   1:6                              

       2/8 or 1:4		                          3/4		                                   0/12                                   1/6                              

3

8

1

 3

5

6

6

4

 3

2

2

8

9

4

8

 		

11)	 Prime #’s to Cylinders  	12)  Composite #’s to Squares      13)  Factors of 9 to 9’s    14)  Squares to 3’s	
  
     	      6 to 3   	                                 9 to 2                                       5 to 1                           2 to 3                           

       6:3 or 2:1			          9:2		                      5:1                               2:3                             

            6/3 or 2/1		                      9/2		                      5/1                               2/3                
             
16)	 Multiples of 3 to Primes  	17)  Odd Circles to Total   	      18)  Factors of 3 to 3’s    19)  Primes to 1’s & 2’s	 
        6 to 6   	                             1 to 15                                          4 to 3                            6 to 3                        

    6:6 or 1:1	                             1:15		                        4:3                          6:3 or 2:1                           

          6/6 or 1/1	                            1/15		                                    4/3                           6/3 or 2:1                           

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