First there were 5 dogs.
Then 2 dogs left.
Now there are how many dogs altogether?
First there were 6 cats.
Then 4 cats left.
Now there are how many cats altogether?
_ -_ = __
First there were 8 horses.
Then 2 horses left.
Now there are how many horses altogether?
_-_= __
First there were 4 rabbits.
Then 2 rabbits left.
Now there are how many rabbits altogether?
_-_= __
First there were 5 hedgehogs.
Then hedgehogs left.
Now there are how many hedgehogs altogether?