Which pairs of fractions can be added using the given common denominators? Write a pair of fractions on each blank to show their common denominator.
Use the pairs of fractions in the box. Not all answer choices will be used.
1.7
2' 9
3 2
46
4 6
5' 10
13
3'5
5 2
6' 9
3 1
20' 3
124
3'9
Common denominator: 24
Common denominator: 15
Common denominator: 9