Rounding

Question 1

Measured value 28.7053 cm, which has six significant figures. Round the measurement to three significant figures.

Answer 1

28.7cm

Question 2

Measured value 28.7053 cm, which has six significant figures.Round the measurement to two significant figures.

Answer 2

29cm

Question 3

Measured value 28.7053 cm, which has six significant figures. Round the measurement to one significant figure.

Answer 3

30cm

Question 4

Measured value 28.7053 cm, which has six significant figures. Round the measurement to four significant figures.

Answer 4

28.71cm

Question 5

Measured value 28.7053 cm, which has six significant figures. Round the measurement to five significant figures.

Answer 5

28.705cm

Question 6

Round off 77.655 and 77.625 to four significant figures.

Answer 6

77.66 and 77.63

Question 7

Which of following is 3942.25 rounded to 3 significant figures?

Answer 7

3940

Question 8

Round off 35.65 to three significant figures.

Answer 8

35.7

Question 9

Which of the following is 2.45986 rounded to 3 significant digits?

Answer 9

2.46

Question 10

Rounding off 0.072251 to four significant figures gives _____.

Answer 10

0.07225

Question 11

We round numbers to reflect accurately the correct number of significant digits
True or False?

Answer 11

True

Question 12

Before we round a number we need to know, how many significant digits we can use.
True or False?

Answer 12

True