 Hello and welcome to the session. In this session we will discuss the fundamental operations on logarithms. First we shall discuss about the addition and subtraction of logarithms. We have to find 2.4832-2.4832 minus 0.64 minus 0.4832 plus 3 minus 0.64 to A. According to the first step we need to add and subtract the mentisa using simple algebraic rules. Now as we have the mentisa as 0.4832 it can be characteristics together minus the algebraic rules. Now the characteristics are 2 and 3.5 minus 0.154.8404. Capturing these two we get 4.8404 as our final answer to discuss about the multiplication of logarithms. In that case we seem to believe we written as minus 3 plus 0.6243 the whole multiplied by the mentisa. The characteristic is minus 3 and the mentisa is 0.6243 and we need to multiply this by 8. This would be equal to minus 3 multiplied by 8 plus 0.43 multiplied by 44. Now minus 24 plus 4.9944 gives us 4.3 by 8 we get minus 20.9944. Next we consider an example in which we need to divide multiplied by 1 upon 9. Now this plus 0 for this one multiplied by 1 upon 9. The characteristic minus 4 is not divisible by 9, characteristic such that it would be divisible by 4. For this we add and subtract 6 to this whole multiplied by 1 upon 9 5.53 and this whole multiplied by 1 upon 9. Then the characteristic as minus 9 which is divisible by 9. So this is equal to minus 9 upon 9 plus divided by 9 gives us 0.6151. So this is equal to 1 bar 0.6151 dividing 4 bar 0.5362 by 9 we get 1 bar 0.6151. So this is how we can multiply or divide two logarithms. So this completes the session. Hope you have understood the concept of fundamental operations on logarithms.