Estimation and Approximation

The round off value of 78.25m to the nearest 10m is

• 90

• 78

• 80

• 75

Round 866 to 2 significant figures.

• 900

• 860

• 870

• 865

Which of these is an approximation of π?

The estimated value of the product of 6.4 and 7.9 is

• 50.56

• 505.6

• 5.056

• 0.056

The following number has been rounded to 1 significant figure.

800

Find the upper bound...

• 850

• 750

• 849

• 749

Round 234578 to 3 significant figures

• 235

• 234000

• 235000

• 234

The round off value of 348g to the nearest 10g is

• 340g

• 345g

• 300g

• 350g

Use estimation to find value for 4x8.93

• 3.575

• 35.72

• 3572

• 0.3572

The estimated value of 74.6 ⁄ 3.8 is

• 1.963

• 19.63

• 196.3

• 196.3

Which of the following numbers does NOT round to 400 when rounding to the nearest 100?

• 467

• 371

• 448

• 385