In this video Narendra (IITB 2003, Purdue Univ) Sir will tell all the rules for addition and subtraction, multiplication and division of significant figures in the units and dimensions physics class 11. This topic is also there in some basic concepts of chemistry class 11. So it is there in both physics and chemistry chapter 1 class 11. Also understand how to know significant digits in a number and rounding off numbers.


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