1. There are 8 boxes of tea. How many boxes of tea are left when 3 boxes are removed?
2. There are 4 apples. How many apples are there if 5 more apples are added to the pile?
3. 9 apples are taken away from a pile of 12 apples and 3 apples are left.
4. 2 apples are added to 3 apples and the total becomes 5.