Question

What are two reasons a common measuring system is important? Make sure you answer in complete sentences.

Answer 1

To unify and simplify.
We have tried to make a standard for everything so that misinterpretations and disagreements in trade and science does not happen.
One meter is the same all over the world. Where as One foot is not the same all over the world. One Litre is the same all over the world where as one Gallon is not. The United States is far behind regarding this standardisation process of using the "new" standardized Sl system.
One could argue that it would be easier to use the "American system" instead over the rest of the world, and of course this could work. The problem is though that even within America there are same words of measurement but different actual values may still apply.
Another problem is that a lot of the old methods include multiples of 12 and 20. This makes it harder to work with when it comes to math.

The Sl standard acknowledges all of this and all measurements are made of multiples of 10. If we buy a packet of 10 eggs, we buy 10 eggs. If we buy 10 packets, we know that 10 times 10 is 100. With the Sl standard we do not operate with quantities as in units of 12 or 20 or other except where it is not practical due to limitations of packing.