 Hi and welcome to the session. Today we will learn about addition of integers. First of all let us see how to add two positive numbers. Suppose we have two numbers plus 5 and plus 2 and now we want to add these two numbers. We will add 5 and 2 and thus we will get 7 and the answer 7 will take a positive sign. So we will get plus 7 which is simply written as 7. So to add two positive numbers we add the numbers, takes a positive sign. Now let us see how to add two negative numbers. Suppose we have two numbers minus 4 and minus 5 and we want to add these two numbers. Then we will add the number 4 and 5 and we will get 9 and the answer 9 will take the sign minus that is negative sign. So we get minus 4 plus minus 5 is equal to minus negative numbers. We add the numbers and the answer negative sign. Next let us see what happens when we add one positive negative integer. We have two integers minus 3 and we want to add these two integers. Then we will subtract the two numbers that is we will subtract 3 from 7 and we will get 4 and the answer 4 will take the sign of the bigger number. Now here we will decide that which number is bigger ignoring the signs of the numbers. So from 7 and 3 bigger number is 7 so 4 will take the sign of 7 that is we will get plus simply written as 4. Thus plus 7 plus minus 3 is equal to 4. Let us take one more example. Suppose we have two integers two numbers that is we will subtract 2 from 9 and we will get 7. 7 will take the sign of the bigger number. Now here from 2 and 9 bigger number will take the sign of 9 that is minus so here our answer will be minus 7. Thus minus 9 is equal to minus 7. So to add one positive and one negative integer and the bigger integer addition of integers on 8 number 9. For let us add two positive numbers that is we will move two steps on the right. So from here we will reach moving up we have 4. So we will move 4 we will reach is equal to we want to add minus 4 on the left of minus we get is equal to plus we want to add one positive and one negative number. That is we have number plus 5. So from 0 we will move 5 steps on the right of 0 and we will read we have number minus 2. So from 5 we will move 2 steps on the left of will reach at from 0 we will move 5 steps on the left of 0 and we will reach at minus number line. And suppose we want to add is equal to 0 is equal to 0 is additive inverse of being subtracted of minus 2 to the integer 5. And we will get so from 0 and we will reach at 7. So we get which is equal to.