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## Algebra 1

### Course: Algebra 1>Unit 3

Lesson 2: Appropriate units

# Reporting measurements

We should think about the appropriate level of precision of different measurements in modeling problems. Created by Sal Khan.

## Want to join the conversation?

• Why are there so many different units to measure in math. Why can't we just use one?
• There's a good reason we can't. let's say we only stick to using metres. Now, how would you measure the distance between planets in metres? it would be an incredibly large number which would be inconvenient to deal with. Hence, we use a different unit (like light years) to make our numbers smaller and manageable.
• Second. Yay!
• what is K2？？？？？？？？？？ can anyone please tell me?
• It is the second largest mountain
• at he said we are nowhere near to finding the height of an atom but a height of an atom is 100 picometer
• what is k2
• Its the second tallest mountain(tallest in winter due to snow accumulation) located in Pakistan
(1 vote)
• At - Sal says that if we were measuring jewelry and we had a 3/4" piece to measure that an inch gradient would be enough precision, however, I have heard that we would need a measuring stick with fractions of an inch gradients to make a measurement.
(1 vote)