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We can weight everything even we can weight ourselves. This is an important Maths lesson because you will need this everywhere in your life when you go to a shop and purchase any material such as Sugar, rice etc. You need to ask them 1kg or 2kg of rice then they can give you that quantity and charge you accordingly. You should know the concept of weight so that you will not get cheated anywhere.
In this Video, Bob explains the basics of weight and explains how different objects have to be taken in different amounts to make up the same weight.