Why do we need unit for …

1. Knowing the units of measurement that correspond with a number can give you so much more information than a digit sitting there by itself.
2. Help to show another person the exact amount you have
3. Assist in solving a mathematical problem, especially in chemistry, where you can follow the units to get to the answer
4. Show which measurement system the person is using (i.e. metric or standard).

Knowing the units of measurement that correspond with a number can give you so much more information than a digit sitting there by itself. Units can:

• Help to show another person the exact amount you have;
• Assist in solving a mathematical problem, especially in chemistry, where you can follow the units to get to the answer;
• Show which measurement system the person is using (i.e. metric or standard).

In a nutshell, the unit of measurement in science serves as the supporting pillar upon which a number rests.