Winter is almost here and most animals are migrating to warmer countries. There are 4 bird families living near the mountain. If 47 bird families flew away to africa and 43 bird families flew away to asia How many bird families flew away for the winter?
There are 4 bird families living near the mountain. 
47 bird families flew away to Africa. 
43 bird families flew away to Asia. 

How many bird families flew away for the winter? 

There are a total of 94 bird families that flew away for the winter.