FRACTIONS JEOPARDY REVIEW

GCF/LCM/PRIME FACTORS

100

find the GCF of 36 & 60

ans = 12

200

find the LCM of 6 and 9

ans = 18

300

find the GCF of 15 and 25

ans = 5

400

find the LCM of 8 and 6

ans = 24

500

make me a factor tree & tell me what the prime factors of 81 are:

        81

       /   \

      9     9

     / \   / \

    3   3 3   3

81 = 3^4

SIMPLIFY/ CONVERT

100

simplify 24/28

1/2

200

simplify 18/24

3/4

300

convert 17/5 into a MIXED fraction

3 2/5

400

convert 2 3/4 into a MIXED fraction

11/4

500

convert 37/7 into a MIXED fraction

5 2/7

ADDING/SUBTRACTING

100

2/3 + 1/6 = ?

4/6 + 1/6 = 5/6

200

5/4 + 7/6 = ?

15/12 + 14/12 = 29/12 = 2 5/12

300

5/8 - 1/4 = ?

5/8 - 2/8 = 3/8

400

9/5 - 3/7 = ?

63/35 - 15/35

=48/35 

= 1 13/35

500

3 1/2 - 1 3/4 = ?

7/2 - 7/4 

= 14/4 - 7/4 

= 7/4 

= 1 3/4

MULTIPLY

100

1/3 x 1/5 = ?

2/15

200

4/7 x 3/8 = ?

12/56 = 3/14

300

5/12 x 2/9 = ?

10/108 = 5/54

400

3/4 x 5/6 x 7/8 = ?

3 x 5 x 7 = 105

4 x 6 x 8 = 192

= 105/102

= 35/64

500

7/15 x 4/5 x 3/8 = ?

7 x 4 x 3 = 84 

15 x 5 x 8 = 600

= 84/600

= 7/50

DIVIDE

100

2/3 ÷ 4/5 = ?

2/3 x 5/4 

= 10/12 

= 5/6

200

3/8 ÷ 2/5 = ?

3/8 x 5/2 

= 15/16

300

7/9 ÷ 3/4 = ?

7/9 x 4/3 

= 28/27

= 1 1/27

400

5/12 ÷ 2/3 = ?

5/12 x 3/2 

= 15/24

= 5/8

500

10/7 ÷ 14/25 = ?

10/7 x 25/14 

= 250/98

= 125/49

= 2 27/29