Make sure to show ALL of your work, including intermediate steps (down to adding and subtracting)

Make sure to show ALL of your work, including intermediate steps (down to adding and subtracting). If you use manipulatives (such as unit blocks) to assist in performing the operations below, then make sure to include pictures of their use and explanations as to how you are using them. 
Use unit blocks to: 
1. Perform the operation: 1 5 ten + 22ten (in base 10) (4 points) 2. Perform the operation: 15 ten ' 22ten (in base 10) (13 points) 3. Perform the operation: 15,i, • 22,i, (in base 6) (13 points) 
Perform each operation on a separate page to avoid cluttered work. You can draw pictures of the unit blocks, if you don't have unit blocks.