Addition / Subtraction of Fractions

• 3

• 9

• 12

• 15

• 3/15

• 2/15

• 5/15

• 10/12

• 5/20

• 7/20

• 9/20

• 14/20

What fraction should be added to 9/12 to get a sum of 11/12

• 2/1

• 2/11

• 2/12

• 3/12

• 1

• 5

• 6

• 2

• 3/10

• 6/10

• 10/5

• 10/6

• 8/16

• 11/16

• 8/24

• 2/8