What would be a doubles fact for 1+2

Question

My 7 year old is doing double facts so I need help to find out the double facts for 1+2

Answer 1

1 + 2 = 3

2 + 4 = 6

Answer 2

Doubles facts are usually something plus itself. Like 2 + 2 = 4 is a doubles fact or 4 + 4 = 8 is a doubles fact. So (1 + 2) + (1 + 2) = 6 would be a doubles fact using "1 + 2"