Subnets are used for many AWS tasks (like creating an EC2 VM), so Brien Posey sheds some light on common errors to end some of the frustration around subnetting. There are any number of tasks within ...
The way you combine the /24 subnets is to change the subnet mask to a /22. (ie. 255.255.252.0) This makes it all one contiguous address space. Just change the subnet mask to 255.255.252.0 and ...