How to do unit conversions.

Assalam o Alaikum dear students: I have made this video specially for low grade students (5 to 8). I have used unitary method to convert one unit to other. The main thing to remember are standards, which I have highlighted here as 1 meter is equal to 100 cm, 1 cm = 10 mm, 1 g = 1000 mg & 1 kg = 1000 g.