Saturday, September 7, 2013

Maths (Cl-2) 8 September 2013

WEIGHT : MASS.
To measure the weight of an object, we must have a standard unit of weight.
Kilogram (kg) is a standard unit of weight.
1 kg = 1000 g.
Conversion : To convert kilogram (kg) into grams (g), multiply the number of kg by 1000 and write g in place of kg.
To convert kg and g into g, multiply the number of kg by 1000 and add to it the number of g.
Example 1 : Convert 6 kg into g.
Solution : We know that 1 kg = 1000 g
                 So                   6 kg = 1000 g x 6 = 6000 g.

Example 2 : Convert 9 kg 800 g into g.
Solution : 9 kg 800 g = 9 x 1000 g + 800 g
                                   = 9000 g +800 g
                                   = 9800 g.

Example 3 : Convert 5430 g into kg and g.
Solution : We know that 1000 g = 1 kg 
                 So                   5430 g = 5000 g + 430 g
                                                    = 5 kg 430 g.

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