1) 4 3/7
+ 9 2/11 =
2) 15
- 11 2/3 =
3) 3/4
x 16/19 =
4) 3 1/7
x 9 1/11 =
5) 3.2 divided by into 396.8 =
6) 7/8 divided by 21/1 =
For the first ones do you mean 4+3/7 or 4*3/7 ?
I can give you the answers for the others:
3) 12/19
5) 1/124
6) 1/24
As long as I dont know whether you mean + or * the number of possibilities how it actually could be is way too large to give you any help. Tell me what you meant and I'll gladly help you.