 Accept significant figures. How precise is your reading? This thing is fact that 2.000. I am going to take you to the next three digits are zero. Oh, sorry. You are sure that these two digits are zero and this is uncertain. But I am still writing zero here. It should not happen in some places. Okay? I cannot say. Okay? So what I was saying was how precise your reading is. Okay? So there is a rule to write the reading to indicate the reading itself. So in a way, it gives you an indication of how precise your readings are. Okay? So please write down several examples. Okay? Write down the rule number of the digits are in the reading. Alright? Then significant. Alright? So there is no ambiguity in terms of if there is a fit or not. Alright? So there are rules for the zeros. Write down the zeros between the zeros between significant. Zero three. How many significant digits? We know that what's understood is significant. So you should count it as a significant figure. For example, point one zero five zero zero. How many? Five. Are insignificant. We are telling you zeros are significant if there is a decimal place. Significant. Alright? Now what about this? Suppose the one point zero zero is significant. Getting it here you should count. Okay? Two thousand significant figures which signify how... It should not change the significant digits. Significant figures. So when you control the defined force, which is a multiplication of these two. So we found themselves have a few marks. This chapter is giving you three marks.