Question

How could u demonstrate that there are 1,000 millimeters in 1 meter

Answer 1

milli- = one thousand
I × I,OOO = I,OOO

Answer 2

There are 1000 millimeters in a meter.

Starting from lower scale that is, centimeter, decimeter and then meter

1 cm = 10 mm

1 dm = 10 cm

And 1 meter = 10 dm

So, when you go up to mm from meter, we will do
`10^(3)` to get the relation between meter and mm.

Hence, 1 meter =
`10*10*10=1000` millimeters.