Approximate values and Estimation

Round off 83.0598 to 3 decimal places.

• 83.05

• 83.050

• 83.06

• 83.060

Round up 49.1931 to 4 significant figures.

• 49.19

• 49.194

• 49.20

• 50.00

Round off 0.08352 L to the nearest mL.

• 83.5 mL

• 84 mL

• 835 mL

• 840 mL

22 / 7 =

• 3.1 (correct to the nearest hundredth)

• 3.14 (correct to 3 decimal places)

• 3.143 (correct to 4 significant figures)

• 3.1428 (correct to 4 decimal places)

After rounding off to the nearest tenth digit, a number become 20.1, the original number can be

• 19.998

• 20.0542

• 20.155

• 21.02

z = 0.0842 (correct to 3 significant figures), which of the following is true?

• 0.08415 ≤ z < 0.08425

• 0.08415 < z ≤ 0.08425

• 0.0840 ≤ z < 0.0845

• 0.0840 < z ≤ 0.0845

How many significant figures is the approximate value 0.07030 correct to?

• 3

• 4

• 5

• 6

Which of the following numbers may have been corrected to 3 significant figures?

I. 0.032

II. 3.80

III. 6500

• I only

• II only

• I and III only

• II and III only

If the value of x lies between 0.086386 and 0.086403, which of the following ks true?

• x = 0.0864 (correct to 3 decimal places)

• x = 0.0864 (correct to 3 significant figures)

• x = 0.08638 (correct to 4 decimal places)

• x = 0.08638 (correct to 4 significant figures)

If the value of y is larger than 63.0853 and smaller than 63.0862, which of the following must be true?

• y = 63.0 (correct to 3 significant figures)

• y = 63.08 (correct to 4 significant figures)

• y = 63.09 (correct to 2 decimal places)

• y = 63.0850 (correct to 4 decimal places)