Why is it important to include both a number and a unit when describing a measure? Please help I can't think of anything!!! :(

2 answers

5 feet or 5 miles? They are not the same.
5 feet or 10 feet? They are not the same.
a number by itself gives no information about what is being measured.
12 books?
3 cups?
1/3 tsp?
133 eggs?
13 meters/second?
5 light-years?
without the units, it's just a number.