Question

write rules "Round off" number​

Answer 1

HERE IS YOUR ANSWER

• Give an example of a measurement whose number of significant digits is clearly too great, and explain why.

• State the purpose of rounding off, and describe the information that must be known to do it properly.

• Round off a number to a specified number of significant digits.

• Explain how to round off a number whose second-most-significant digit is 9.

• Carry out a simple calculation that involves two or more observed quantities, and express the result in the appropriate number of significant figures.

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Answer 2

Explanation:

1. If the first digit dropped is less than 5, the last digit retained should remain unchanged .

2. 1. If the first digit dropped is more than 5, the last digit retained is increased by one.

3. If the digit to be dropped is 5,the previous digit which is to be retained is increased by one if it is odd and retained as such if it is even.