It makes sense to learn and use metric

Think about it:

Quick, add these lengths:

1/2 + 11/16 + 3/4 + 2/3

or

.123 + .565 + .321 + .978

Which is easiest? And, very importantly - which is least error prone? Error measurements can cost you alot of money in some situations, or even your life.

This applies to volume measurements also.
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