F1 Ch 8 Significant Figures

0.00754281 =

• 0.00754, cor. to 3 sig. fig.

• 0.00755, cor. to 5 d.p.

• 0.007542, cor. to 6 sig. fig.

• 0.008, cor. to 1 d.p.

• 3.14159, cor. to 5 d.p.

• 3.1415, cor. to 5 sig. fig.

• 3.14285, cor. to 5 d.p.

• 3.14286, cor. to 6 sig. fig.

Estimate the value of 56 + 44 + 34 + 27 + 112 by rounding up each number to the nearest ten, the result is

• 260

• 270

• 280

• 300

By rounding off the number 34612, which of the following approximate values CANNOT be obtained?

• 30000

• 34610

• 34700

• 35000

Round up 123.45 to 2 significant figures

0.0496454 =

• 0.049 (cor. to 2 sig. fig.)

• 0.0496 (cor. to 3 sig. fig.)

• 0.04965 (cor. to 5 sig. fig.)

• 0.049646 (cor. to 6 d.p.)

How many significant figures are there?
0.00400

• 1
• 3
• 5
• 6

How many significant figures are there?
100.00

• 1
• 3
• 4
• 5

How many significant figures are there?
5.00000008

• 2
• 6
• 8

• 9

Round off 0.0751828 to 4 decimal places.