Question

which of the following measurement is more precise?

20
0.2
0.02
0.020​

Answer 1

Answer:

20 is the more precise...

Answer 2

Answer:

0.020 is more precise.

Explanation:

• Precise measurement is the measurement which have least error.
• So when we have differentiate among same units we see the total numbers.
• In the first case 20,the number is rounded only upto 10th place.
• In the second case 0.2 ,the number is rounded to its 10th place.
• In the third case 0.02, the number is rounded to 100th place.
• In the fourth case 0.020, so there are 3 significant figures.So the number is rounded up to thousands.
• If we are differentiating among different units of same measurement then we have to see the lowest measurement.
• The lowest measurement will have the least error.
• Example: mm is more precise than cm.

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