Work Step by Step
1. Add the right side column 4 + 7 = 11. Write the 1 and carry the 1 by placing it at the top 2. Add the left side column and add any numbers carried from the right side column 5 + 6 = 11. Then take the 1 that is placed on top and added to that value making it 11+1=12. Write 12. Reading left to right, we get 121 as the answer.