Place value of a digit in a number is its value when it is separated by expanding the number. To understand it, an example is illustrated below. *suppose we need to find the place value of 5 in a number 275689. First we expand the number . 275689=200000+70000 + 5000 +600 + 80 +9. Therefore place value of 5 is 5000. Note: In shortcut we can find the place value of 5 by writing the number 5 and putting zeros (000) to its right side equal to the number of digits (689) ie. 5000. See this image .

is video is particularity for class 1 to clarify them the concept of dozen. Dozen is the measuring unit of countable think. 1 Dozen=12 Here l am explaining one small event for the student. Suppose you went to the market for buing banana because you like banana. What you tell to the shopkeeper. Will you tell give me 1 kilogram of banana or will you tell give me one pound of banana or what will you say give me few banana . That means there must be a particular unit ; which you need to explain your demand for buying the banana. You can say that give me 1 banana or 2  or like this. But there is a standard units of measurement which is acceptable throughout the world. As the shop keeper or the dealer do the business so they cannot count 1 piece of banana for dealing business. That's why they use a standard unit of counting things in a lot. And this Dozeni concept is the result of that business relationship . You can watch this video. This video is with hindi lecture. English lectur