Algebra session 6 – We have started with the concept of Signed integers i.e. Negative numbers from the last session. We are using a method developed by the mathematician W. W. Sawyer. To learn this concept we are using easily available material at home. Signed integers is the new concept and we are going to learn this concept by doing. We have already learned about the concept of Positive one (+1) and Negative one (-1). In this session we are going to revise the same concepts again and we are going to start with addition and subtraction of signed integers.